EXHIBIT 4.1

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                            ----------------------
                              MUZAK HOLDINGS LLC
                                      and
                         MUZAK HOLDINGS FINANCE CORP.,
                                  as Issuers,

                            ----------------------

                                      and


                STATE STREET BANK AND TRUST COMPANY, as Trustee


                                   INDENTURE

================================================================================

                          Dated as of March 18, 1999

             $75,000,000 aggregate principal amount at maturity of

                      13% Senior Discount Notes due 2010

 
                             CROSS-REFERENCE TABLE



TIA                                                                           Indenture
Section                                                                        Section
- -------                                                                        -------
                                                                           
310(a)(1).................................................................    7.10
   (a)(2).................................................................    7.10
   (a)(3).................................................................    N.A.
   (a)(4).................................................................    N.A
   (b)....................................................................    7.08; 7.10; 12.02
   (b)(1).................................................................    7.10
   (b)(9).................................................................    7.10
   (c)....................................................................    N.A.
311(a)....................................................................    7.11
   (b)....................................................................    7.11
   (c)....................................................................    N.A.
312(a)....................................................................    2.05
   (b)....................................................................    10.03
   (c)....................................................................    10.03
313(a)....................................................................    7.06
   (b)(1).................................................................    7.06
   (b)(2).................................................................    7.06
   (c)....................................................................    12.02
   (d)....................................................................    7.06
314(a)....................................................................    4.02; 4.04; 12.02
   (b)....................................................................    N.A.
   (c)(1).................................................................    12.04; 12.05
   (c)(2).................................................................    12.04; 12.05
   (c)(3).................................................................    N.A.
   (d)....................................................................    N.A.
   (e)....................................................................    10.05
   (f)....................................................................    N.A.
315(a)....................................................................    7.01; 7.02
   (b)....................................................................    7.05; 10.02
   (c)....................................................................    7.01
   (d)....................................................................    6.05; 7.01; 7.02
   (e)....................................................................    6.11
316(a) (last sentence)....................................................    12.06
   (a)(1)(A)..............................................................    6.05
   (a)(1)(B)..............................................................    6.04
   (a)(2).................................................................    8.02
   (b)....................................................................    6.07
   (c)....................................................................    8.04
317(a)(1).................................................................    6.08
   (a)(2).................................................................    6.09
 

 
 
                                                                            
   (b)....................................................................    7.12
318(a)....................................................................    12.01


                           N.A. means Not Applicable

____________________
NOTE:  This Cross-Reference Table shall not, for any purpose, be deemed to be a
       part of this Indenture.

 
                               TABLE OF CONTENTS

 
 
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                                   ARTICLE 1

                  DEFINITIONS AND INCORPORATION BY REFERENCE
                                                                                              
Section 1.01.  Definitions....................................................................    1             
Section 1.01.  Other Definitions..............................................................   44             
Section 1.02.  Incorporation by Reference of                                                                    
                  Trust Indenture Act.........................................................   45             
Section 1.03.  Rules of Construction..........................................................   46             
                                                                                                                
                                  ARTICLE 2  
                                 
                                  THE NOTES  
            
Section 2.01.  Dating; Incorporation of Form in Indenture.....................................   46             
Section 2.02.  Execution and Authentication...................................................   47             
Section 2.03.  Registrar and Paying Agent.....................................................   49             
Section 2.04.  Paying Agent to Hold Money in Trust............................................   49             
Section 2.05.  Noteholder Lists...............................................................   50             
Section 2.06.  Transfer and Exchange..........................................................   50             
Section 2.07.  Replacement Notes..............................................................   51             
Section 2.08.  Outstanding Notes..............................................................   52             
Section 2.09.  Temporary Notes................................................................   52             
Section 2.10.  Cancellation...................................................................   52             
Section 2.11.  Defaulted Interest.............................................................   53             
Section 2.12.  Deposit of Moneys..............................................................   53             
Section 2.13.  CUSIP Number...................................................................   54             
Section 2.14.  Book-Entry Provisions for Global Notes.........................................   54             
Section 2.15.  Registration of Transfers and Exchanges........................................   56             
Section 2.16.  Joint and Several Liability....................................................   62             
                                        
                                                
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                                    ARTICLE 3   
                                                
                                   REDEMPTION   
                                                                                                
Section 3.01.  Notices to Trustee.............................................................   63             
Section 3.02.  Selection by Trustee of Notes to Be Redeemed...................................   63             
Section 3.03.  Notice of Redemption...........................................................   64             
Section 3.04.  Effect of Notice of Redemption.................................................   65             
Section 3.05.  Deposit of Redemption Price....................................................   65             
Section 3.06.  Notes Redeemed in Part.........................................................   66             
Section 3.07.  Optional Redemption............................................................   66             
                                                                              
                                   ARTICLE 4
                                                                              
                                   COVENANTS   
                                                                              
Section 4.01.  Payment of Notes...............................................................   67             
Section 4.02.  Provision of Financial Statements and Other Information........................   67             
Section 4.03.  Waiver of Stay, Extension or Usury Laws........................................   68             
Section 4.04.  Compliance Certificate; Notice                                                                   
                  of Default; Tax Information.................................................   69             
Section 4.05.  Taxes..........................................................................   70             
Section 4.06.  Limitation on Additional Indebtedness..........................................   70             
Section 4.07.  Limitation on Restricted Payments..............................................   71             
Section 4.08.  Limitation of Guarantees by Restricted Subsidiaries............................   76             
Section 4.09.  Limitation on Certain Asset Sales..............................................   77             
Section 4.10.  Limitation on Transactions with Affiliates.....................................   82             
Section 4.11.  Limitations on Liens...........................................................   85             
Section 4.12.  Limitations on Investments.....................................................   85             
Section 4.13.  Limitation on Sale and Lease-Back Transactions.................................   86             
Section 4.14.  Payments for Consent...........................................................   86             
Section 4.15.  Corporate Existence............................................................   86             
Section 4.16.  Change of Control..............................................................   87             
Section 4.17.  Maintenance of Office or Agency................................................   90             
 

                                     -ii-

 


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Section 4.18.  Limitation on Dividend and Other Payment Restrictions Affecting
                 Affecting Restricted Subsidiaries............................................   91
Section 4.19.  Limitation on Conduct of Business..............................................   93
Section 4.20.  Compliance with Laws...........................................................   94
Section 4.21.  Limitation on Preferred Stock of Restricted Subsidiaries.......................   94
Section 4.22.  [Intentionally Omitted]........................................................   94
Section 4.23.  Maintenance of Properties and Insurance........................................   94

                                    ARTICLE 5

                              SUCCESSOR CORPORATION

Section 5.01.  Limitation on Consolidation Merger and Sale of Assets..........................   95
Section 5.02.  Successor Person Substituted...................................................   97

                                    ARTICLE 6

                              DEFAULTS AND REMEDIES

Section 6.01.  Events of Default..............................................................   98
Section 6.02.  Acceleration...................................................................  100
Section 6.03.  Other Remedies.................................................................  101
Section 6.04.  Waiver of Past Defaults and Events of Default..................................  102
Section 6.05.  Control by Majority............................................................  102
Section 6.06.  Limitation on Suits............................................................  103
Section 6.07.  Rights of Holders to Receive Payment...........................................  103
Section 6.08.  Collection Suit by Trustee.....................................................  104
Section 6.09.  Trustee May File Proofs of Claim...............................................  104
Section 6.10.  Priorities.....................................................................  105
Section 6.11.  Undertaking for Costs..........................................................  105

                                    ARTICLE 7

                                     TRUSTEE

Section 7.01.  Duties of Trustee..............................................................  106


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Section 7.02.  Rights of Trustee..............................................................  108
Section 7.03.  Individual Rights of Trustee...................................................  109             
Section 7.04.  Trustee's Disclaimer...........................................................  109             
Section 7.05.  Notice of Defaults.............................................................  110             
Section 7.06.  Reports by Trustee to Holders..................................................  110             
Section 7.07.  Compensation and Indemnity.....................................................  111
Section 7.08.  Replacement of Trustee.........................................................  112             
Section 7.09.  Successor Trustee by Consolidation, Merger or Conversion.......................  113             
Section 7.10.  Eligibility; Disqualification..................................................  113             
Section 7.11.  Preferential Collection of Claims Against Issuers..............................  114             
Section 7.12.  Paying Agents..................................................................  114             
                                                                                                
                                    ARTICLE 8                                                   
                                                                                                
                       AMENDMENTS, SUPPLEMENTS AND WAIVERS                                      
                                                                                                
Section 8.01.  Without Consent of Holders.....................................................  115             
Section 8.02.  With Consent of Holders........................................................  116             
Section 8.03.  Compliance with Trust Indenture Act............................................  118             
Section 8.04.  Revocation and Effect of Consents..............................................  118             
Section 8.05.  Notation on or Exchange of Notes...............................................  119             
Section 8.06.  Trustee to Sign Amendments, etc................................................  119             
                                                                                                
                                    ARTICLE 9                                                   
                                                                                                
                       DISCHARGE OF INDENTURE; DEFEASANCE                                       
                                                                                                
Section 9.01.  Satisfaction and Discharge of Indenture........................................  119             
Section 9.02.  Legal Defeasance...............................................................  120             
Section 9.03.  Covenant Defeasance............................................................  121             
Section 9.04.  Conditions to Defeasance or Covenant Defeasance................................  122             
Section 9.05.  Deposited Money and U.S. Government Obligations to Be Held in                                    
                  Trust; Other Miscellaneous Provisions.......................................  125             
Section 9.06.  Reinstatement..................................................................  126             
Section 9.07.  Moneys Held by Paying Agent....................................................  126             
Section 9.08.  Moneys Held by Trustee.........................................................  127             


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                                   ARTICLE 10                                                  
                                                                                               
                                   GUARANTEES                                                  
                                                                                               
Section 10.01. Guarantees.....................................................................  127             
Section 10.02. Limitation on Liability........................................................  130             
Section 10.03. Successors and Assigns.........................................................  131
Section 10.04. No Waiver......................................................................  131             
Section 10.05. Modification...................................................................  131             
Section 10.06. Release of Guarantor...........................................................  132             
Section 10.07. Execution of Supplemental Indenture for Future Guarantors......................  132             
Section 10.08. Execution and Delivery of Guarantees...........................................  133             
                                                                                               
                                   ARTICLE 11                                                  
                                                                                               
                      INTERCREDITOR AGREEMENT WITH LENDERS                                     
                        UNDER THE SENIOR CREDIT FACILITY                                       
                                                                                               
Section 11.01. Non-Petition Covenant..........................................................  134
Section 11.02. Subordination Upon Substantive Consolidation...................................  134             
Section 11.03. When Distribution Must be Paid Over............................................  135             
Section 11.04. Trustee's Relation to Senior Indebtedness......................................  136             
Section 11.05. Subrogation of Rights of Holders of Senior Indebtedness........................  136             
Section 11.06. Provisions Solely to Define Relative Rights....................................  137             
Section 11.07. Trustee to Effectuate Subordination............................................  138             
Section 11.08. No Waiver of Subordination Provisions..........................................  139             
Section 11.09. Notice to Trustee..............................................................  140             
Section 11.10. Reliance on Judicial Order or Certificate of Liquidating Agent.................  141             
Section 11.11. Rights of Trustee as a Holder of Indebtedness under the Senior                                   
                  Credit Facility; Preservation of Trustee's                                                    
                  Rights......................................................................  142             
Section 11.12. Article Applicable to Paying Agents............................................  142             
                                                                    

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Section 11.13. No Suspension of Remedies...................................................... 122              
                                                 
                                   ARTICLE 12    
                                                 
                                  MISCELLANEOUS  
                                                 
Section 12.01. Trust Indenture Act Controls...................................................  122             
Section 12.02. Notices........................................................................  123             
Section 12.03. Communications by Holders with Other Holders...................................  124             
Section 12.04. Certificate and Opinion as to Conditions Precedent.............................  124             
Section 12.05. Statements Required in Certificate and Opinion.................................  125             
Section 12.06. When Treasury Notes Disregarded................................................  125             
Section 12.07. Rules by Trustee and Agents....................................................  126             
Section 12.08. Business Days; Legal Holidays..................................................  126             
Section 12.09. Governing Law..................................................................  126             
Section 12.10. No Adverse Interpretation of Other Agreements..................................  126             
Section 12.11. No Recourse Against Others.....................................................  126             
Section 12.12. Successors.....................................................................  127             
Section 12.13. Multiple Counterparts..........................................................  127             
Section 12.14. Table of Contents, Headings, etc...............................................  127             
Section 12.15. Separability...................................................................  127             
                
EXHIBITS        
              
Exhibit A.   Form of Note..................................................................... A-1              
                                                                                                                
Exhibit B.   Form of Legend for Global Notes.................................................. B-1              
                                                                                                                
Exhibit C.   Form of Certificate to Be Delivered in Connection with Transfers to                                
             Non-QIB Accredited Investors..................................................... C-1              
                                                                                                                
Exhibit D.   Form of Certificate to Be Delivered in Connection with Transfers                                   
             Pursuant to Regulation S......................................................... D-1              
                                                                                                                
Exhibit E.   Form of Guarantee................................................................ E-1              
                                                  

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Exhibit F.   Form of Supplemental Indenture................................................... F-1
 

                                   -vii-   
                                                                            
                                                                            

 
          INDENTURE, dated as of March 18, 1999, among MUZAK HOLDINGS LLC, a
Delaware limited liability company (the "Company"), MUZAK HOLDINGS FINANCE
CORP., a Delaware corporation ("Finance Corp." and, together with the Company,
the "Issuers") and STATE STREET BANK AND TRUST COMPANY, a Massachusetts banking
corporation, as Trustee (the "Trustee").

          Each party agrees as follows for the benefit of the other parties and
for the equal and ratable benefit of the Holders of the Issuers' 13% Senior
Discount Notes due 2010 (the "Notes").

                                   ARTICLE 1

                  DEFINITIONS AND INCORPORATION BY REFERENCE

Section 1.01.  Definitions.
               ----------- 

          "ABRY" means ABRY Partners, Inc., a Delaware corporation.

          "ABRY Management Agreement" means the Management Agreement dated as of
October 6, 1998, and as amended prior to the Issue Date, between ABRY and the
Company.

          "ABRY Subordinated Debt" means Indebtedness of the Company or Muzak
LLC in principal amount not to exceed $30 million in the aggregate at any time
outstanding (a) that is owed to ABRY III, ABRY, MEM Holdings, Inc. or any other
investment fund controlled by ABRY, (b) if such Indebtedness is Indebtedness of
the Company, as to which the payment of principal of (and premium, if any) and
interest and other payment obligations in respect of such Indebtedness shall be
subordinate to the prior payment in full of the Company's Obligations under the
Notes such that no payments of principal (or premium, if any) or interest on or
otherwise due in respect of such Indebtedness may be permitted for so long as
any Default or Event of Default shall have occurred and be continuing, (c) that
shall automatically convert into common equity of the Company within 

 
                                      -2-

18 months of the date of issuance thereof, unless refinanced, and (d) the terms
of which have been determined to be fair and reasonable to the Company or Muzak
LLC, as the case may be, as determined in good faith by the Board of Directors
of the Company or Muzak LLC, as the case may be, and evidenced by a Board
Resolution delivered to the Trustee.

          "ABRY II" means ABRY Broadcast Partners II, L.P., a Delaware limited
partnership.

          "ABRY III" means ABRY Broadcast Partners III, L.P., a Delaware limited
partnership.

          "Accreted Value" means an amount per $1,000 principal amount at
maturity of the Notes that is equal to (a) as of any date prior to March 15,
2004, the sum of (x) $533.285 and (y) the portion of the excess of the principal
amount at maturity of each Note over $533.285 which shall have been amortized
through such date, such amount to be so amortized on a daily basis and
compounded semi-annually on each March 15 and September 15 at the rate of 13%
per annum from the Issue Date through the date of determination computed on the
basis of a 360-day year of twelve 30-day months and (b) as of any date after
March 15, 2004, $1,000.

          "Acquired Indebtedness" means Indebtedness of a Person (including an
Unrestricted Subsidiary) existing at the time such Person becomes a Restricted
Subsidiary or is merged into or consolidated with any other Person or which is
assumed in connection with the acquisition of assets from such Person and, in
each case, whether or not incurred by such Person in connection with, or in
anticipation or contemplation of, such Person becoming a Restricted Subsidiary
or such merger, consolidation or acquisition.

          "Acquisition EBITDA" means, with respect to any Asset Acquisition, (i)
EBITDA attributable to the assets to be acquired in such Asset Acquisition for
the same fiscal quarter utilized in determining "Consolidated Leverage Ratio"
plus (ii) the projected, quantifiable cost reductions expected to be realized
and non-recurring costs and expenses, in each case, in

 
                                      -3-

connection with such Asset Acquisition and as a result of, in the case of cost
reductions, an established program of cost reductions adopted in good faith by
the Board of Directors of the Company. For purposes of the foregoing, cost
reductions and non-recurring costs and expenses, in each case, shall be
calculated on a pro forma basis as if such cost reductions and non-recurring
                --- -----
costs and expenses, in each case, had been implemented at the beginning of such
fiscal quarter. Prior to the consummation of any transaction requiring the
inclusion of Acquisition EBITDA in the calculation of Consolidated Leverage
Ratio, the Company shall deliver to the Trustee an Officers' Certificate
indicating the cost reductions and non-recurring costs and expenses, in each
case, taken into account in determining Acquisition EBITDA and the assumptions
underlying such cost reductions and non-recurring costs and expenses.

          "Adjusted Net Assets" of any Person at any date shall mean the lesser
of

          (1)  the amount by which the fair salable value of the assets of such
     Person at such date exceeds the total amount of liabilities, including,
     without limitation, contingent liabilities (after giving effect to all
     other fixed and contingent liabilities), but excluding liabilities under
     the Guarantee of such Person at such date, and

          (2)  the amount by which the fair salable value of the assets of such
     Person at such date exceeds the amount that will be required to pay the
     probable liability of such Person on its debts (after giving effect to all
     other fixed and contingent liabilities and after giving effect to any
     collection from any Subsidiary of such Person in respect of the obligations
     of such Person under the Guarantee of such Person), excluding Indebtedness
     in respect of the Guarantee of such Person, as they become absolute and
     matured.

          "Affiliate" means, with respect to any specific Person, any other
Person that directly or indirectly through one or more intermediaries controls,
or is controlled by, or is under common control with, such specified Person. For
the pur- 

 
                                      -4-

poses of this definition, "control" (including, with correlative meanings, the
terms "controlling," "controlled by," and "under common control with"), as used
with respect to any Person, means the possession, directly or indirectly, of the
power to direct or cause the direction of the management or policies of such
Person, whether through the ownership of voting securities, by agreement or
otherwise; provided that, for purposes of Section 4.10 of this Indenture, 
           --------                                            
beneficial ownership of at least 10% of the voting securities of a Person,
either directly or indirectly, shall be deemed to be control. Notwithstanding
the foregoing, no Person (other than the Company or any Subsidiary of the
Company) in whom a Securitization Entity makes an Investment in connection with
a Qualified Securitization Transaction shall be deemed to be an Affiliate of the
Company or any of its Subsidiaries solely by reason of such Investment.

          "Agent" means any Registrar, Paying Agent, co-registrar or agent for
service of notices and demands.

          "Asset Acquisition" means

          (1)  an Investment by the Company or any Restricted Subsidiary of the
     Company in any other Person pursuant to which such Person shall become a
     Restricted Subsidiary of the Company or any Restricted Subsidiary of the
     Company, or shall be merged with or into the Company or any Restricted
     Subsidiary of the Company or

          (2)  the acquisition by the Company or any Restricted Subsidiary of
     the Company of the assets of any Person (other than a Restricted Subsidiary
     of the Company) which constitute all or substantially all of the assets of
     such Person or comprise any division or line of business of such Person or
     any other Properties or assets of such Person other than in the ordinary
     course of business.

          "Asset Sale" means any direct or indirect sale, issuance, conveyance,
assignment, transfer, lease or other disposition (including any Sale and Lease-
Back Transaction), other than in the ordinary course of business or to the
Company or 

 
                                      -5-

any of its Restricted Subsidiaries, in any single transaction or series of
related transactions of

          (1)  any Capital Stock of or other equity interest in any Restricted
     Subsidiary of the Company or

          (2)  any other Property or assets of the Company or of any Restricted
     Subsidiary thereof; provided that Asset Sales shall not include
                         --------                                   

          (1)  a transaction or series of related transactions for which the
     Company or its Restricted Subsidiaries receive aggregate consideration of
     less than $1 million,

          (2)  the sale, lease, conveyance, disposition or other transfer of all
     or substantially all of the assets of the Company as permitted under
     Section 5.01 of this Indenture or any disposition that constitutes a Change
     of Control,

          (3)  the sale or discount, in each case without recourse, of accounts
     receivable arising in the ordinary course of business, but only in
     connection with the compromise or collection thereof,

          (4)  the factoring of accounts receivable arising in the ordinary
     course of business pursuant to customary arrangements,

          (5)  the licensing of intellectual property,

          (6)  disposals or replacements of obsolete equipment in the ordinary
     course of business,

          (7)  sales of accounts receivable, equipment and related assets
     (including contract rights) of the type specified in the definition of
     Qualified Securitization Transaction to a Securitization Entity for the
     fair market value thereof, including cash in an amount at least equal to
     75% of the fair market value thereof as determined in 

 
                                      -6-

     accordance with GAAP (for the purposes of this clause (7), Purchase Money
     Notes shall be deemed to be cash),

          (8)  transfers of accounts receivable, equipment and related assets
     (including contract rights) of the type specified in the definition of
     Qualified Securitization Transaction (or a fractional undivided interest
     therein) by a Securitization Entity in a Qualified Securitization
     Transaction, and

          (9)  any transfer of assets acquired by the Company or any of its
     Restricted Subsidiaries to an independent affiliate of the Company or any
     of its Restricted Subsidiaries in accordance with the terms of the License
     Agreements as such agreements are in effect on the Issue Date and as the
     same may be amended or restated in a manner which is not more
     disadvantageous to the Holders in any material respect than the terms of
     such agreements as in effect on the Issue Date.

          "Asset Sale Proceeds" means, with respect to any Asset Sale,

          (1)  cash and Cash Equivalents received by the Company or any
     Restricted Subsidiary of the Company from such Asset Sale (including cash
     and Cash Equivalent received as consideration for the assumption of
     liabilities incurred in connection with or in anticipation of such Asset
     Sale), after

               (a)  provision for all income or other taxes measured by or
          resulting from such Asset Sale (after taking into account any
          reduction in consolidated tax liability due to available tax credits
          or deductions and any tax sharing arrangements),

               (b)  payment of all brokerage commissions, underwriting and other
          fees and expenses related to such Asset Sale,

 
                                      -7-

               (c)  provision for minority interest holders in any Restricted
          Subsidiary of the Company as a result of such Asset Sale,

               (d)  repayment of Indebtedness that is secured by the assets
          subject to such Asset Sale or otherwise required to be repaid in
          connection with such Asset Sale and

               (e)  deduction of appropriate amounts to be provided by the
          Company or a Restricted Subsidiary of the Company as a reserve, in
          accordance with GAAP, against any liabilities associated with the
          assets sold or disposed of in such Asset Sale and retained by the
          Company or a Restricted Subsidiary after such Asset Sale, including,
          without limitation, pension and other post-employment benefit
          liabilities and liabilities related to environmental matters or
          against any indemnification obligations associated with the assets
          sold or disposed of in such Asset Sale, and

          (2)  promissory notes and other noncash consideration received by the
     Company or any Restricted Subsidiary of the Company from such Asset Sale or
     other disposition upon the liquidation or conversion of such notes or
     noncash consideration into cash or Cash Equivalents.

          "Attributable Indebtedness" in respect of a Sale and Lease-Back
Transaction means, as at the time of determination, the greater of

          (1)  the fair value of the Property subject to such arrangement and

          (2)  the present value of the notes (discounted at the rate of
     interest implied in such transaction, determined in accordance with GAAP)
     of the total obligations of the lessee for rental payments during the
     remaining term of the lease included in such Sale and Lease-Back
     Transaction (including any period for which such lease has been extended).

 
                                      -8-

          "Available Asset Sale Proceeds" means, with respect to any Asset Sale,
the aggregate Asset Sale Proceeds from such Asset Sale that have not been
applied in accordance with clauses (3)(a) or (3)(b), and which have not yet been
the basis for an Excess Proceeds Offer in accordance with clause (3)(c) of
Section 4.09(a) under this Indenture.

          "Board of Directors" means, with respect to any Person, the board of
directors of such Person (or, if such Person is a limited liability company, the
board of managers of such company) or similar governing body or any duly
authorized committee thereof.

          "Board Resolution" means with respect to any Person, a copy of a
resolution certified by the Secretary or an Assistant Secretary of such Person
to have been duly adopted by the Board of Directors of such Person and to be in
full force and effect on the date of such certification.

          "Capital Stock" means, with respect to any Person, any and all shares,
interests, participations or other equivalents (however designated and whether
or not voting) of corporate stock, partnership or limited liability company
interests or any other participation, right or other interest in the nature of
an equity interest in such Person including, without limitation, Common Stock
and Preferred Stock of such Person, or any option, warrant or other security
convertible into any of the foregoing.

          "Capitalized Lease Obligation" means with respect to any Person,
Indebtedness represented by obligations under a lease that is required to be
capitalized for financial reporting purposes in accordance with GAAP, and the
amount of such Indebtedness shall be the capitalized amount of such obligations
determined in accordance with GAAP.

          "Cash Equivalents" means

          (1)  marketable direct obligations issued by, or unconditionally
     guaranteed by, the United States Government or issued by any agency or
     instrumentality thereof and 

 
                                      -9-

     backed by the full faith and credit of the United States, in each case
     maturing within one year from the date of acquisition thereof;

          (2)  marketable direct obligations issued by any state of the United
     States of America or any political subdivision of any such state or any
     public instrumentality thereof maturing within one year from the date of
     acquisition thereof and, at the time of acquisition, having one of the two
     highest ratings obtainable from either S&P or Moody's;

          (3)  commercial paper maturing no more than one year from the date of
     creation thereof and, at the time of acquisition, having a rating of at
     least A-1 from S&P or at least P-1 from Moody's;

          (4)  certificates of deposit or bankers' acceptances maturing within
     one year from the date of acquisition thereof issued by (i) any bank
     organized under the laws of the United States of America or any state
     thereof or the District of Columbia or any U.S. branch of a foreign bank
     having at the date of acquisition thereof combined capital and surplus of
     not less than $250,000,000 or (ii) Brown Brothers Harriman;

          (5)  repurchase obligations with a term of not more than seven days
     for underlying securities of the types described in clause (1) above
     entered into with any bank meeting the qualifications specified in clause
     (4) above; and

          (6)  investments in money market funds which invest substantially all
     their assets in securities of the types described in clauses (1) through
     (5) above.

          A "Change of Control" of the Company will be deemed to have occurred
at such time as

          (1)  any Person or group of related Persons for purposes of Section
     13(d) of the Exchange Act (a "Group"), 

 
                                      -10-

     other than a Permitted Holder, becomes the beneficial owner (as defined in
     Rule under Rule 13d-3 or any successor rule or regulation promulgated under
     the Exchange Act, except that a Person shall be deemed to have "beneficial
     ownership" of all securities that such Person has the right to acquire,
     whether such right is exercisable immediately or only after the passage of
     time) of more than 35% of the total voting power of the Company's Capital
     Stock, and the Permitted Holders beneficially do not own, in the aggregate,
     a greater percentage of the total voting power of the Capital Stock of the
     Company than such other Person or Group and do not have the right or
     ability by voting power, contract or otherwise to elect or designate for
     election a majority of the Board of Directors of the Company,

          (2)  there shall be consummated any consolidation or merger of the
     Company in which the Company is not the continuing or surviving Person or
     pursuant to which the Common Stock of the Company would be converted into
     cash, securities or other Property, other than a merger or consolidation of
     the Company in which the holders of the Capital Stock of the Company
     outstanding immediately prior to the consolidation or merger hold, directly
     or indirectly, at least a majority of the Capital Stock of the surviving
     corporation immediately after such consolidation or merger,

          (3)  during any period of two consecutive years, individuals who at
     the beginning of such period constituted the Board of Directors of the
     Company (together with any new Directors whose election by such Board of
     Directors or whose nomination for election by the equityholders of the
     Company has been approved by 66 2/3% of the Directors then still in office
     who either were Directors at the beginning of such period or whose election
     or recommendation for election was previously so approved) cease to
     constitute a majority of the Board of Directors of the Company or

          (4)  the approval by the holders of Capital Stock of the Company of
     any plan or proposal for the liquidation or 

 
                                      -11-


     dissolution of the Company (whether or not otherwise in compliance with the
     provisions of this Indenture).

          "Commission" means the United States Securities and Exchange
Commission.

          "Common Stock" of any Person means all Capital Stock of such Person
that is generally entitled to

          (1)  vote in the election of directors of such Person or

          (2)  if such Person is not a corporation, vote or otherwise
     participate in the selection of the governing body, partners, managers or
     others that will control the management and policies of such Person.

          "Company" means the party named as such in the first paragraph of this
Indenture until a successor replaces such party pursuant to Article 5 of this
Indenture and thereafter means the successor.

          "Consolidated Interest Expense" means, with respect to any Person, for
any period, the aggregate amount of interest which, in conformity with GAAP,
would be set forth opposite the caption "interest expense" or any like caption
on an income statement for such Person and its Restricted Subsidiaries on a
consolidated basis including, but not limited to,

          (1)  Redeemable Dividends, whether paid or accrued, on Preferred
     Stock,

          (2)  imputed interest included in Capitalized Lease Obligations,

          (3)  all commissions, discounts and other fees and charges owed with
     respect to letters of credit and bankers' acceptance financing,

          (4)  the net costs associated with Hedging Obligations,

 
                                      -12-

          (5)  amortization of other financing fees and expenses,

          (6)  the interest portion of any deferred payment obligation,

          (7)  amortization of discount or premium, if any, and

          (8)  all other non-cash interest expense (other than interest
     amortized to cost of sales) 

plus, without duplication,

          (1)  all net capitalized interest for such period,

          (2)  all interest incurred or paid under any guarantee of Indebtedness
     (including a guarantee of principal, interest or any combination thereof)
     of any Person, and

          (3)  the amount of all dividends or distributions paid on Disqualified
     Capital Stock (other than dividends paid or payable in shares of Capital
     Stock of the Company that does not constitute Disqualified Capital Stock).

          "Consolidated Leverage Ratio" means, with respect to any Person, the
ratio of

          (1)  the sum of the aggregate outstanding amount of Indebtedness of
     such Person and its Restricted Subsidiaries and Preferred Stock of any such
     Restricted Subsidiary issued in accordance with Section 4.21 of this
     Indenture as of the date of calculation (the "Transaction Date") on a
     consolidated basis determined in accordance with GAAP to

          (2)  the product of (a) such Person's EBITDA for the full fiscal
     quarter (the "One Quarter Period") ending on or prior to the date of
     determination for which financial statements are available and (b) four.

For purposes of this definition, clauses (1) and (2) above shall be calculated
after giving effect on a pro forma basis to:
                         --- -----          

 
                                      -13-

          (a)  the incurrence or repayment of any Indebtedness of such Person or
     any of its Restricted Subsidiaries or the issuance or redemption or other
     repayment of Preferred Stock of any such Restricted Subsidiary (and the
     application of the proceeds thereof) giving rise to the need to make such
     calculation and any incurrence or repayment of other Indebtedness and, in
     the case of any Restricted Subsidiary, the issuance or redemption or other
     repayment of Preferred Stock (and the application of the proceeds thereof),
     other than the incurrence or repayment of Indebtedness in the ordinary
     course of business for working capital purposes pursuant to working capital
     facilities, occurring during the One Quarter Period or at any time
     subsequent to the last day of the One Quarter Period and on or prior to the
     Transaction Date, as if such incurrence or repayment or issuance or
     redemption or other repayment, as the case may be (and the application of
     the proceeds thereof), occurred on the first day of the One Quarter Period;
     and

          (b)  any Asset Sales or Asset Acquisitions occurring during the One
     Quarter Period or at any time subsequent to the last day of the One Quarter
     Period and on or prior to the Transaction Date, as if such Asset Sale or
     Asset Acquisition (including the incurrence, assumption or liability for
     any Acquired Indebtedness) occurred on the first day of the One Quarter
     Period as follows:

               (x)  with respect to Asset Sales, the EBITDA attributable to the
          assets which are the subject of Asset Sales that occurred shall be
          excluded; and

               (y)  with respect to Asset Acquisitions, the Acquisition EBITDA
          attributable to the assets which are the subject of the applicable
          Asset Acquisition shall be included.

If such Person or any of its Restricted Subsidiaries directly or indirectly
guarantees Indebtedness of a third Person, the preceding paragraph shall give
effect to the incurrence of such guaranteed Indebtedness as if such Person or
any Restricted 

 
                                      -14-

Subsidiary or such Person had directly incurred or otherwise assumed such
guaranteed Indebtedness.

          "Consolidated Net Income" means, with respect to any Person, for any
period, the aggregate of the Net Income of such Person and its Restricted
Subsidiaries for such period, on a consolidated basis, determined in accordance
with GAAP; provided, however, that
           --------  -------      

          (1)  the Net Income of any Person other than a Restricted Subsidiary
     of the referent Person shall be included only to the extent of the amount
     of dividends or distributions paid to the referent Person or a Restricted
     Subsidiary of such referent Person,

          (2)  the Net Income of any Restricted Subsidiary of the Person in
     question that is subject to any restriction or limitation on the payment of
     dividends or the making of other distributions, other than those permitted
     under Section 4.18, shall be excluded to the extent of such restriction or
     limitation,

          (3)  the Net Income of any Person acquired in a pooling of interests
     transaction for any period prior to the date of such acquisition shall be
     excluded,

          (4)  any net gain or loss (in the case of any net loss, only to the
     extent that such determination of Consolidated Net Income is being made in
     connection with the determination of amounts available for Restricted
     Payments pursuant to the provisions described under Section 4.07 of this
     Indenture) resulting from an Asset Sale by the Person in question or any of
     its Restricted Subsidiaries other than in the ordinary course of business
     shall be excluded,

          (5)  extraordinary gains and losses shall be excluded,

          (6)  income or loss attributable to discontinued operations
     (including, without limitation, operations dis-

 
                                      -15-

     posed of during such period whether or not such operations were classified
     as discontinued) shall be excluded and

          (7)  in the case of a successor to the referent Person by
     consolidation or merger or as a transferee of the referent Person's assets,
     any earnings of the successor corporation prior to such consolidation,
     merger or transfer of assets shall be excluded.

          "Control Investment Affiliate" means, as to any Person, any other
Person which (a) is an Affiliate of such Person and (b) is organized by such
Person primarily for the purpose of making equity or debt investments in one or
more companies.

          "Corporate Trust Office" means the office of the Trustee at which at
any particular time its corporate trust business shall be principally
administered, which office at the date of execution of this Indenture is located
at 225 Franklin Street, Boston, Massachusetts 02110.

          "Cumulative Consolidated Interest Expense" means, with respect to any
Person, as of any date of determination, Consolidated Interest Expense from
April 1, 1999 to the end of such Person's most recently ended full fiscal
quarter prior to such date, taken as a single accounting period.

          "Cumulative EBITDA" means, with respect to any Person, as of any date
of determination, EBITDA from April 1, 1999 to the end of such Person's most
recently ended full fiscal quarter prior to such date, taken as a single
accounting period.

          "Default" means any event that is, or after notice or passage of time
or both would be, an Event of Default.

          "Depository" means, with respect to the Notes issued in the form of
one or more Global Notes, The Depository Trust Company or another Person
designated as Depository by the Company, which Person must be a clearing agency
registered under the Exchange Act.

 
                                      -16-

          "Director" means, with respect to any Person, a member of the Board of
Directors of such Person (or, if such Person is a limited liability company, a
member of the board of managers of such Person).

          "Disqualified Capital Stock" means any Capital Stock of a Person or a
Restricted Subsidiary thereof which, by its terms (or by the terms of any
security into which it is convertible or for which it is exchangeable at the
option of the holder), or upon the happening of any event, matures or is
mandatorily redeemable, pursuant to a sinking fund obligation or otherwise, or
is redeemable at the option of the holder thereof, in whole or in part, on or
prior to the maturity date of the Notes. Without limitation of the foregoing,
Disqualified Capital Stock shall be deemed to include any Preferred Stock of a
Person or a Restricted Subsidiary of such Person, with respect to either of
which, under the terms of such Preferred Stock, by agreement or otherwise, such
Person or Restricted Subsidiary is obligated to pay current dividends or
distributions in cash during the period prior to the maturity date of the Notes;
provided, however, that Preferred Stock of a Person or any Restricted Subsidiary
- --------  -------                                                               
thereof that is issued with the benefit of provisions requiring a change of
control offer or asset sale offer to be made for such Preferred Stock in the
event of a change of control of such Person or Restricted Subsidiary or the sale
of any assets of such Person or Restricted Subsidiary which provisions have
substantially the same effect as the provisions described under Sections 4.16
and 4.09 of this Indenture, respectively, shall not be deemed to be Disqualified
Capital Stock solely by virtue of such provisions.

          "EBITDA" means, with respect to any Person and its Restricted
Subsidiaries, for any period, an amount equal to


          (1)  the sum of

               (a) Consolidated Net Income for such period, plus

               (b) the provision for taxes for such period based on income or
          profits to the extent such income 

 
                                      -17-

          or profits were included in computing Consolidated Net Income and any
          provision for taxes utilized in computing net loss under clause (a)
          hereof, plus

               (c) Consolidated Interest Expense for such period, plus

               (d) depreciation for such period on a consolidated basis, plus

               (e) amortization of intangibles for such period (but excluding
          any non-cash item to the extent it represents the amortization of a
          prepaid cash expense that was paid in any prior period) on a
          consolidated basis, plus

               (f) any other non-cash items reducing Consolidated Net Income for
          such period except for any non-cash items that represent accruals of,
          or reserves for, cash disbursements to be made in any future
          accounting period, minus

          (2)  all non-cash items increasing Consolidated Net Income (other than
     any non-cash items representing deferred revenue to the extent that such
     revenue was not included in Consolidated Net Income in any prior period)
     for such period, all for such Person and its Restricted Subsidiaries
     determined on a consolidated basis in accordance with GAAP;

provided, however, that, for purposes of calculating EBITDA during any fiscal
- --------  -------                                                            
quarter, cash income from a particular Investment (other than a Restricted
Subsidiary) of such Person shall be included only

          (1)  if cash income has been received by such Person with respect to
     such Investment during each of the previous four fiscal quarters, or

          (2)  if the cash income derived from such Investment is attributable
     to Cash Equivalents.

 
                                      -18-

          "Electro Systems" means Electro Systems Corporation, a Florida
corporation.

          "Electro Systems Acquisition" means the acquisition of Electro Systems
pursuant to a Stock Purchase Agreement dated as of February 18, 1999 between
Muzak LLC and Carolina Georgia Sound, Inc.

          "Equity Offering" means any public or private sale of Common Stock
(other than Disqualified Capital Stock) of the Company pursuant to which the
Company receives net proceeds of at least $20 million.

          "Exchange Act" means the Securities Exchange Act of 1934, as amended
and the rules and regulations of the Commission promulgated thereunder.

          "fair market value" means, with respect to any asset or Property, the
price which could be negotiated in an arm's-length, free market transaction, for
cash, between a willing seller and a willing and able buyer, neither of whom is
under undue pressure or compulsion to complete the transaction. Fair market
value shall be determined by the Board of Directors of the Company acting
reasonably and in good faith and shall be evidenced by a Board Resolution of the
Company delivered to the Trustee.

          "Finance Corp." means the party named as such in the first paragraph
of this Indenture until a successor replaces such party pursuant to Article 5 of
this Indenture and thereafter means the successor.

          "Foreign Restricted Subsidiary" means any Restricted Subsidiary of the
Company that is not organized under the laws of the United States or any State
thereof or the District of Columbia.

          "GAAP" means generally accepted accounting principles consistently
applied as in effect in the United States from time to time.

 
                                      -19-

          "Guarantee" means any guarantee of the obligations of the Issuers
under this Indenture and the Notes by any Restricted Subsidiary in accordance
with the provisions of this Indenture.  When used as a verb, "Guarantee" shall
have a corresponding meaning.

          "Guarantor" means each Restricted Subsidiary of the Company which
Guarantees the Notes pursuant to the terms of this Indenture; provided that upon
                                                              --------          
the release and discharge of such Restricted Subsidiary from its Guarantee in
accordance with the terms of this Indenture, such Restricted Subsidiary shall
cease to be a Guarantor.

          "Hedging Obligations" means, with respect to any Person, the net
payment obligations of such Person under (a) interest rate swap agreements,
interest rate cap agreements and interest rate collar agreements and (b) other
agreements or arrangements entered into in order to protect such Person against
fluctuations in commodity prices, interest rates or currency exchange rates.

          "Holder" or "Noteholder" means the Person in whose name a Note is
registered on the Registrar's books.

          "incur" means, with respect to any Indebtedness or other obligation of
any Person, to create, issue, incur (by conversion, exchange or otherwise),
assume, guarantee or otherwise become liable in respect of such Indebtedness or
other obligation or the recording, as required pursuant to GAAP or otherwise, of
any such Indebtedness or other obligation on the balance sheet of such Person
(and "incurrence," "incurred," "incurrable," and "incurring" shall have meanings
correlative to the foregoing); provided that a change in GAAP that results in an
                               --------                                         
obligation of such Person that exists at such time becoming Indebtedness shall
not be deemed an incurrence of such Indebtedness.

          "Indebtedness" means (without duplication), with respect to any
Person, any indebtedness at any time outstanding, secured or unsecured,
contingent or otherwise, which is for borrowed money (whether or not the
recourse of the lender is to 

 
                                      -20-

the whole of the assets of such Person or only to a portion thereof), or
evidenced by bonds, notes, debentures or similar instruments or representing the
balance deferred and unpaid of the purchase price of any Property (excluding,
without limitation, any balances that constitute accounts payable or trade
payables, and other accrued liabilities arising in the ordinary course of
business) if and to the extent any of the foregoing indebtedness would appear as
a liability upon a balance sheet of such Person prepared in accordance with
GAAP, and shall also include, to the extent not otherwise included

          (1)  any Capitalized Lease Obligations of such Person,

          (2)  obligations secured by a lien to which the Property or assets
     owned or held by such Person is subject, whether or not the obligation or
     obligations secured thereby shall have been assumed,

          (3)  guarantees of items of other Persons which would be included
     within this definition for such other Persons (whether or not such items
     would appear upon the balance sheet of the guarantor),

          (4)  all obligations for the reimbursement of any obligor on any
     letter of credit, banker's acceptance or similar credit transaction,

          (5)  Disqualified Capital Stock of such Person or any Restricted
     Subsidiary thereof, and

          (6)  hedging obligations of any such Person (if and to the extent such
     hedging obligations would appear as a liability upon a balance sheet of
     such Person prepared in accordance with GAAP).

The amount of Indebtedness of any Person at any date shall be the outstanding
balance at such date of all unconditional obligations as described above and,
with respect to contingent obligations, the maximum liability upon the
occurrence of the contingency giving rise to the obligation; provided that
                                                             --------     

 
                                      -21-

          (1)  the amount outstanding at any time of any Indebtedness issued
     with original issue discount is the principal amount of such Indebtedness
     less the remaining unamortized portion of the original issue discount of
     such Indebtedness at such time as determined in conformity with GAAP,

          (2)  Indebtedness shall not include any liability for federal, state,
     local or other taxes,

          (3)  the amount of Indebtedness of a Person which is without recourse
     to any Property or assets of such Person except to the extent of any Lien
     on Property or assets of such Person which secures such Indebtedness shall
     be the lesser of the principal amount of such Indebtedness and the fair
     market value of the Property or assets subject to the Lien, and

          (4)  the amount of Indebtedness represented by Disqualified Capital
     Stock shall be the greater of its voluntary or involuntary liquidation
     preference and its maximum fixed repurchase price, but excluding accrued
     dividends, if any.

          The "maximum fixed repurchase price" of any Disqualified Capital Stock
which does not have a fixed repurchase price shall be calculated in accordance
with the terms of such Disqualified Capital Stock as if such Disqualified
Capital Stock were purchased on any date on which Indebtedness shall be required
to be determined pursuant to this Indenture, and if such price is based upon, or
measured by, the fair market value of such Disqualified Capital Stock, such fair
market value shall be determined reasonably and in good faith by the Board of
Directors of the issuer of such Disqualified Capital Stock.

          Notwithstanding any other provision of the foregoing definition, any
trade payable arising from the purchase of goods or materials or for services
obtained in the ordinary course of business shall not be deemed to be
"Indebtedness" of the Company or any of its Restricted Subsidiaries for purposes
of this definition. Furthermore, guarantees of (or obligations 

 
                                      -22-

with respect to letters of credit supporting) Indebtedness otherwise included in
the determination of such amount shall not also be included.

          "Indenture" means this Indenture as amended, restated or supplemented
from time to time.

          "Independent Financial Advisor" means an investment banking firm of
national reputation in the United States

          (1)  which does not, and whose directors, officers and employees or
     Affiliates do not, have a direct or indirect financial interest in the
     Company and

          (2)  which, in the judgment of the Board of Directors of the Company,
     is otherwise independent and qualified to perform the task for which it is
     to be engaged.

          "Institutional Accredited Investor" means an institution that is an
"accredited investor" as that term is defined in Rule 501 (a)(1), (2), (3) or
(7) promulgated under the Securities Act.

          "Interest Payment Date" means the stated maturity of an installment of
interest on the Notes.

          "Investments" means, with respect of any Person, directly or
indirectly, any advance, account receivable (other than advances and accounts
receivable arising in the ordinary course of business of such Person), loan or
capital contribution to (by means of transfers of Property to others, payments
for Property or services for the account or use of others or otherwise), the
purchase of any Capital Stock, bonds, notes, debentures, partnership or joint
venture interests or other securities of, the acquisition, by purchase or
otherwise, of all or substantially all of the business or assets or stock or
other evidence of beneficial ownership of, any Person or the making of any
investment in any Person. Investments shall exclude

 
                                      -23-

          (1)  extensions of trade credit on commercially reasonable terms in
     accordance with normal trade practices of such Person and 

          (2)  the repurchase of securities of any Person by such Person.

          If the Company or any Restricted Subsidiary of the Company sells or
otherwise disposes of any Capital Stock of any direct or indirect Restricted
Subsidiary of the Company such that such Restricted Subsidiary would no longer
constitute a Subsidiary, the Company shall be deemed to have made an Investment
on the date of any such sale or disposition equal to the fair market value of
the Capital Stock of such Restricted Subsidiary not sold or disposed of.

          "Issue Date" means March 18, 1999.

          "Issuers" means each party named as such in the first paragraph of
this Indenture until a successor replaces such party pursuant to Article 5 of
this Indenture and thereafter means the successor.

          "License Agreements" means the License Agreements between the Muzak
LLC and its independent affiliates.

          "Lien" means, with respect to any Property or assets of any Person,
any mortgage or deed of trust, pledge, hypothecation, assignment, deposit
arrangement, security interest, lien, charge, easement, encumbrance, preference,
priority, or other security agreement or preferential arrangement of any kind or
nature whatsoever on or with respect to such Property or assets (including
without limitation, any Capitalized Lease Obligation, conditional sales, or
other title retention agreement having substantially the same economic effect as
any of the foregoing).

          "Maturity Date" means March 15, 2010.

 
                                      -24-

          "Merger Transactions" means those transactions referred to
collectively in the Offering Memorandum as "Merger Transactions."

          "Moody's" means Moody's Investors Service, Inc. and its successors.

          "Muzak Finance" means Muzak Finance Corp., a Delaware corporation.

          "Muzak LLC" means Muzak LLC, a Delaware limited liability company.

          "Net Income" means, with respect to any Person for any period, the net
income (loss) of such Person determined in accordance with GAAP.

          "Non-U.S. Person" means a person who is not a U.S. person, as defined
in Regulation S.

          "Notes" means the securities that are issued under this Indenture, as
amended or supplemented from time to time pursuant to this Indenture and any
notes issued in exchange therefor as contemplated hereunder.

          "Obligations" means all obligations for principal, premium, interest,
penalties, charges, fees, fees and expenses of counsel, indemnities,
reimbursement obligations, damages, claims and other liabilities payable under
the documentation governing any Indebtedness.

          "Offering Memorandum" means the offering memorandum dated March 12,
1999 pursuant to which the Notes were originally offered.

          "Officer" means, with respect to any Person, the Chief Executive
Officer, the Chief Financial Officer, Treasurer or the President, of such
Person.

          "Officers' Certificate" means, with respect to any Person, a
certificate signed by the Chief Executive Officer, the President or any Vice
President and the Chief Financial Of-

 
                                      -25-

ficer or any Treasurer of such Person that shall comply with applicable
provisions of this Indenture.

          "Opinion of Counsel" means a written opinion from legal counsel who
and which is reasonably acceptable to the Trustee complying with the
requirements of this Indenture.  Such legal counsel shall be outside counsel and
not an employee of or in-house counsel to the Company.

          "Pending Capstar Acquisition" means the acquisition by the Company of
certain Muzak franchises from Capstar Broadcasting Corporation pursuant to a
Contribution Agreement between the Company and Capstar Broadcasting Corporation,
dated February 19, 1999, and the subsequent transfer of such assets to Muzak LLC
in exchange for equity interests in Muzak LLC.

          "Permitted Asset Swap" means, with respect to any Person, the
substantially concurrent exchange of assets of such Person for assets of another
Person which are useful to the business of such aforementioned Person.

          "Permitted Holders" means each of ABRY III, ABRY II and each Control
Investment Affiliate of ABRY III or ABRY II.

          "Permitted Indebtedness" means:

          (1)  Indebtedness of the Company or any Restricted Subsidiary arising
     under or in connection with the Senior Credit Facility in an aggregate
     principal amount not to exceed $200 million outstanding at any time less
     (i) any mandatory prepayment actually made thereunder (to the extent, in
     the case of payments of revolving credit borrowings, that the corresponding
     commitments have been permanently reduced) or scheduled payments actually
     made thereunder and (ii) the aggregate amount of Indebtedness of
     Securitization Entities in Qualified Securitization Transactions (other
     than Qualified Securitization Transactions involving equipment and related
     assets);

 
                                      -26-

          (2)  Indebtedness under the (i) Notes and the Guarantees (if any)
     thereof and (ii) the Senior Subordinated Notes and the Senior Subordinated
     Guarantees;

          (3)  Indebtedness not covered by any other clause of this definition
     which is outstanding on the Issue Date;

          (4)  Indebtedness of the Company to any Restricted Subsidiary and
     Indebtedness of any Restricted Subsidiary to the Company or another
     Restricted Subsidiary;

          (5)  Purchase Money Indebtedness that does not in the aggregate exceed
     5% of the Company's consolidated total assets;

          (6)  the incurrence by the Company or any Restricted Subsidiary of
     Hedging Obligations that are incurred in the ordinary course of business of
     the Company or such Restricted Subsidiary and not for speculative purposes;
     provided that, in the case of any Hedging Obligation that relates to (i)
     --------                                                                
     interest rate risk, the notional principal amount of such Hedging
     Obligation does not exceed the principal amount of the Indebtedness to
     which such Hedging Obligation related and (ii) currency risk, such Hedging
     Obligation does not increase the Indebtedness of the Company and its
     Restricted Subsidiaries outstanding other than as a result of fluctuations
     in foreign currency exchange rates or by reason of fees, indemnities and
     compensation payable thereunder;

          (7)  Refinancing Indebtedness;

          (8)  Indebtedness of Foreign Restricted Subsidiaries of the Company in
     an aggregate principal amount not to exceed $10 million at any one time
     outstanding; provided the aggregate amount then outstanding under this
                  --------                                                 
     clause (8) when added to the aggregate amount then outstanding under clause
     (1) above shall not exceed the aggregate amount permitted under clause (1)
     above;

 
                                      -27-

          (9)  guarantees by the Company and its Restricted Subsidiaries of each
     other's Indebtedness; provided that such Indebtedness is permitted to be
                           --------   
     incurred under this Indenture;

          (10) Indebtedness incurred by the Company or any of its Restricted
     Subsidiaries constituting reimbursement obligations with respect to letters
     of credit issued in the ordinary course of business, including, without
     limitation, letters of credit in respect of workers' compensation claims or
     self-insurance, or other Indebtedness with respect to reimbursement type
     obligations regarding workers' compensation claims;

          (11) Indebtedness arising from agreements of the Company or a
     Restricted Subsidiary of the Company providing for indemnification,
     adjustment of purchase price, earn out or other similar obligations, in
     each case, incurred or assumed in connection with the acquisition or
     disposition of any business, assets or a Restricted Subsidiary of the
     Company, other than guarantees of Indebtedness incurred by any Person
     acquiring all or any portion of such business, assets or Restricted
     Subsidiary for the purpose of financing such acquisition; provided that, in
                                                               --------
     the case of a disposition, the maximum assumable liability in respect of
     all such Indebtedness shall at no time exceed the gross proceeds actually
     received by the Company and its Restricted Subsidiaries in connection with
     such disposition;

          (12) obligations in respect of performance and surety bonds and
     completion guarantees provided by the Company or any Restricted Subsidiary
     of the Company in the ordinary course of business;

          (13) the ABRY Subordinated Debt;

          (14) the incurrence by a Securitization Entity of Indebtedness in a
     Qualified Securitization Transaction that is not recourse to the Company or
     any Subsidiary of 

 
                                      -28-

     the Company (except for Standard Securitization Undertakings);

          (15) Indebtedness of the Company issued to current or former members
     of management of the Company or any of its Restricted Subsidiaries to
     finance the repurchase, redemption or other acquisition of Capital Stock of
     the Company pursuant to clause (6) of Section 4.07(b) of this Indenture;
     and

          (16) additional Indebtedness of the Company and its Restricted
     Subsidiaries not to exceed $5 million in aggregate principal amount at any
     one time outstanding.

          "Permitted Investments" means

          (1)  Investments by the Company or by a Restricted Subsidiary thereof,
     in the Company or any Restricted Subsidiary;

          (2)  Investments by the Company, or by a Restricted Subsidiary
     thereof, in a Person, if as a result of such Investment

               (a) such Person becomes a Restricted Subsidiary of the Company or

               (b) such Person is merged, consolidated or amalgamated with or
          into, or transfers or conveys substantially all of its assets to, or
          is liquidated into, the Company or a Restricted Subsidiary thereof;

          (3)  Investments in cash and Cash Equivalents;

          (4)  reasonable and customary loans and advances made to employees in
     the ordinary course of business;

          (5)  an Investment that is made by the Company or a Restricted
     Subsidiary thereof in the form of any Capital Stock, bonds, notes,
     debentures, partnership or joint venture interests or other securities that
     are issued by a third party to the Company or such Restricted Subsidiary

 
                                      -29-

     solely as partial consideration for the consummation of an Asset Sale that
     is otherwise permitted under Section 4.09 of this Indenture;

          (6)  Hedging Obligations entered into in the ordinary course of the
     Company's or its Restricted Subsidiaries' business and not for speculative
     purposes;

          (7)  any acquisition of assets to be used in the business of the
     Company or any of its Restricted Subsidiaries solely in exchange for the
     issuance of Capital Stock (other than Disqualified Capital Stock) of the
     Company;

          (8)  additional Investments not to exceed $5 million at any one time
     outstanding;

          (9)  Investments existing on the Issue Date;

          (10) Investments in securities of trade creditors or customers
     received pursuant to any plan of reorganization or similar arrangement upon
     the bankruptcy or insolvency of such trade creditors or customers;

          (11) guarantees by the Company or any Restricted Subsidiary of
     Indebtedness otherwise permitted to be incurred by Restricted Subsidiaries
     of the Company under this Indenture; and

          (12) any Investment by the Company or a Restricted Subsidiary of the
     Company in a Securitization Entity or any Investment by a Securitization
     Entity in any other Person in connection with a Qualified Securitization
     Transaction; provided that any Investment in a Securitization Entity is in
                  --------                                                     
     the form of a Purchase Money Note or an equity interest.

          "Permitted Liens"

          (1)  Liens on Property or assets of, or any shares of Capital Stock of
     or secured indebtedness of, any Person existing at the time such Person
     becomes a Restricted Subsidiary of the Company or at the time such Person
     is 

 
                                      -30-

     merged into the Company or any of its Restricted Subsidiaries; provided
                                                                    --------
     that such Liens are not incurred in connection with, or in contemplation
     of, such Person becoming a Restricted Subsidiary of the Company or merging
     into the Company or any of its Restricted Subsidiaries,

          (2)  Liens securing Indebtedness under the Senior Credit Facility and
     Liens securing other Indebtedness of any Restricted Subsidiary of the
     Company; provided in each case, such Indebtedness is incurred in compliance
              --------                                                          
     with Section 4.06 of this Indenture,

          (3)  Liens securing Refinancing Indebtedness; provided that any such
                                                        --------              
     Lien does not extend to or cover any Property, Capital Stock or
     Indebtedness other than the Property, shares or debt securing the
     Indebtedness so refunded, refinanced or extended,

          (4)  Liens in favor of the Company or any of its Restricted
     Subsidiaries,

          (5)  Liens securing industrial revenue bonds,

          (6)  Liens to secure Purchase Money Indebtedness that is otherwise
     permitted under this Indenture; provided that
                                     --------     

               (a) the principal amount of the Indebtedness secured by such Lien
          does not exceed 100% of the purchase price, or the cost of
          installation, construction or improvement, of the Property to which
          such Purchase Money Indebtedness relates, and

               (b) such Lien does not extend to or cover any Property other than
          such item of Property and any improvements on such Property,

          (7)  statutory liens or landlords', carriers', warehouseman's,
     mechanics', suppliers', materialmen's, repairmen's or other like Liens
     arising in the ordinary course of business which do not secure any
     Indebtedness and with respect to amounts not yet delinquent or being
     contested 
 

 
                                      -31-

     in good faith by appropriate proceedings, if a reserve or other appropriate
     provision, if any, as shall be required in conformity with GAAP shall have
     been made therefor,

          (8)  Liens for taxes, assessments or governmental charges that are
     being contested in good faith by appropriate proceedings,

          (9)  easements, rights-of-way, zoning restrictions and other similar
     charges or encumbrances or title defects or leases or subleases granted to
     others in respect of real property not interfering in any material respect
     with the ordinary conduct of the business of the Company or any of its
     Restricted Subsidiaries,

          (10) other Liens securing obligations incurred in the ordinary course
     of business which obligations do not exceed $5 million in the aggregate at
     any one time outstanding,

          (11) Liens existing on the Issue Date and Liens securing the Notes
     (and the Guarantees, if any),

          (12) Liens incurred or deposits made in the ordinary course of
     business in connection with workers' compensation, unemployment insurance
     and other types of social security, including landlord Liens on leased
     properties and any Lien securing letters of credit issued in the ordinary
     course of business consistent with past practice in connection therewith,
     or to secure the performance of tenders, statutory obligations, surety and
     appeal bonds, bids, leases, government contracts, performance and return-
     of-money bonds and other similar obligations,

          (13) attachment or judgment Liens not giving rise to an Event of
     Default,

          (14) Liens upon specific items of inventory or other goods and
     proceeds of any Person securing such Person's obligations in respect of
     bankers' acceptances issued or created for the account of such Person to
     facilitate the 

 
                                      -32-

     purchase, shipment, or storage of such inventory or other goods,

          (15)  Liens securing reimbursement obligations with respect to
     commercial letters of credit which encumber documents and other Property
     relating to such letters of credit and products and proceeds thereof,

          (16)  Liens encumbering deposits made to secure obligations arising
     from statutory, regulatory, contractual, or warranty requirements of the
     Company or any of its Restricted Subsidiaries, including rights of offset
     and set-off,

          (17)  Liens securing Hedging Obligations with respect to Indebtedness
     that is otherwise permitted under this Indenture,

          (18)  Liens on assets transferred to a Securitization Entity or on
     assets of a Securitization Entity, in either case incurred in connection
     with a Qualified Securitization Transaction,

          (19)  Liens arising from filing Uniform Commercial Code financing
     statements regarding leases,

          (20)  Liens in favor of customs and revenue authorities arising as a
     matter of law to secure payment of custom duties in connection with the
     importation of goods,

          (21)  deposits made in the ordinary course of business to secure
     liability to insurance carriers,

          (22)  any interest or title of a lessor or a sublessor under an
     operating lease,

          (23)  Liens under licensing agreements for use of intellectual
     property entered into in the ordinary course of business,

 
                                      -33-

          (24)  Liens imposed by law incurred by the Company or any of its
     Restricted Subsidiaries in the ordinary course of business,

          (25)  Liens securing the Senior Subordinated Notes and the Senior
     Subordinated Guarantees in accordance with the terms of the Senior
     Subordinated Note Indenture as in effect on the Issue Date, and

          (26)  any extensions, substitutions, replacements or renewals of the
     foregoing.

          "Person" means any individual, corporation, partnership, limited
liability company, joint venture, association, joint-stock company, trust,
unincorporated organization or government (including any agency or political
subdivision thereof).

          "Preferred Stock" means any Capital Stock of a Person, however
designated, which entitles the holder thereof to a preference with respect to
dividends, distributions or liquidation proceeds of such Person over the holders
of other Capital Stock issued by such Person.

          "Private Placement Legend" means the legend initially set forth on the
Notes in the form set forth on Exhibit A.

          "Property" of any Person means all types of real, personal, tangible,
intangible or mixed property owned by such Person whether or not included in the
most recent consolidated balance sheet of such Person and its Subsidiaries under
GAAP.

          "Purchase Money Indebtedness" means Indebtedness and Capitalized Lease
Obligations of any Person incurred in the normal course of business of such
Person for the purpose of financing all or any part of the purchase price, or
the cost of installation, construction or improvement of, any Property.

          "Purchase Money Note" means a promissory note of a Securitization
Entity evidencing a line of credit, which may be irrevocable, from the Company
or any Subsidiary of the Company 

 
                                      -34-

in connection with a Qualified Securitization Transaction to a Securitization
Entity, which note shall be repaid from cash available to the Securitization
Entity, other than amounts required to be established as reserves pursuant to
agreements, amounts paid to investors in respect of interest, principal and
other amounts owing to such investors and amounts paid in connection with the
purchase of newly generated receivables or newly acquired equipment.

          "Qualified Institutional Buyer" or "QIB" shall have the meaning
specified in Rule 144A promulgated under the Securities Act.

          "Qualified Securitization Transaction" means any transaction or series
of transactions that may be entered into by the Company or any of its
Subsidiaries pursuant to which the Company or any or its Subsidiaries may sell,
convey or otherwise transfer to (a) a Securitization Entity (in the case of a
transfer by the Company or any of its Subsidiaries) and (b) any other Person (in
the case of a transfer by a Securitization Entity), or may grant a security
interest in, any accounts receivable or equipment (whether now existing or
arising or acquired in the future) of the Company or any of its Subsidiaries,
and any assets related thereto including, without limitation, all collateral
securing such accounts receivable and equipment, all contracts and contract
rights and all guarantees or other obligations in respect of such accounts
receivable and equipment, proceeds of such accounts receivable and equipment and
other assets (including contract rights) which are customarily transferred or in
respect of which security interests are customarily granted in connection with
asset securitization transactions involving accounts receivable and equipment.

          "Redeemable Dividend" means, for any dividend or distribution with
regard to Preferred Stock, the quotient of the dividend or distribution divided
by the difference between one and the maximum statutory federal income tax rate
(expressed as a decimal number between 1 and 0) then applicable to the issuer of
such Preferred Stock.

 
                                      -35-

          "Redemption Date" when used with respect to any Note to be redeemed
means the date fixed for such redemption pursuant to this Indenture.

          "Refinancing Indebtedness" means Indebtedness that refunds,
refinances, modifies, replaces, defers, supplements or extends any Indebtedness
outstanding on the Issue Date or other Indebtedness permitted to be incurred by
the Company or its Restricted Subsidiaries pursuant to the terms of this
Indenture (other than pursuant to clauses (1), (4), (6) and (8) through (16) of
the definition of Permitted Indebtedness), but only to the extent that


          (1)  the Refinancing Indebtedness is subordinated to the Notes to at
     least the same extent as the Indebtedness being refunded, refinanced,
     modified, replaced, deferred, supplemented or extended, if at all,

          (2)  the Refinancing Indebtedness is scheduled to mature either

               (a) no earlier than the Indebtedness being refunded, refinanced,
          modified, replaced, deferred, supplemented or extended, or

               (b) after the maturity date of the Notes,

          (3)  the portion, if any, of the Refinancing Indebtedness that is
     scheduled to mature on or prior to the maturity date of the Notes has a
     Weighted Average Life to Maturity at the time such Refinancing Indebtedness
     is incurred that is equal to or greater than the Weighted Average Life to
     Maturity of the portion of the Indebtedness being refunded, refinanced,
     modified, replaced, deferred, supplemented or extended that is scheduled to
     mature on or prior to the maturity date of the Notes, and

          (4)  such Refinancing Indebtedness is in an aggregate principal amount
     that is equal to or less than the sum of

 
                                      -36-

               (a) the aggregate principal amount of the Indebtedness being
          refunded, refinanced, modified, replaced, deferred, supplemented or
          extended,

               (b) the amount of accrued and unpaid interest, if any, and
          premiums owed, if any, not in excess of preexisting prepayment
          provisions on such Indebtedness being refunded, refinanced, modified,
          replaced, deferred, supplemented or extended and

               (c) the amount of customary fees, expenses and costs related to
          the incurrence of such Refinancing Indebtedness.

          "Registration Rights Agreement" means the Registration Rights
Agreement dated as of March 18, 1999 among the Issuers and CIBC Oppenheimer
Corp. and Goldman Sachs & Co., as Initial Purchasers.

          "Regulation S" means Regulation S promulgated under the Securities
Act.

          "Restricted Payment" means any of the following:

          (1)  the declaration or payment of any dividend or any other
     distribution or payment on Capital Stock of the Company or any Restricted
     Subsidiary of the Company or any payment made to the direct or indirect
     holders (in their capacities as such) of Capital Stock of the Company or
     any Restricted Subsidiary of the Company (other than (a) dividends or
     distributions payable solely in Capital Stock (other than Disqualified
     Capital Stock), and (b) in the case of Restricted Subsidiaries of the
     Company, dividends or distributions payable to the Company or to a
     Restricted Subsidiary of the Company and to the other holders of Capital
     Stock of each such Restricted Subsidiary, in each case on a pro rata
                                                                 -------- 
     basis),

          (2)  the purchase, redemption or other acquisition or retirement for
     value of any Capital Stock of the Company or any of its Restricted
     Subsidiaries (other than Capital 

 
                                      -37-

     Stock owned by the Company or a Wholly Owned Subsidiary of the Company,
     excluding Disqualified Capital Stock),

          (3)  the making of any principal payment on, or the purchase,
     defeasance, repurchase, redemption or other acquisition or retirement for
     value of any Indebtedness which is subordinated in right of payment to the
     Notes prior to any scheduled maturity, scheduled repayment or scheduled
     sinking fund payment (other than subordinated Indebtedness acquired in
     anticipation of satisfying a scheduled sinking fund obligation, principal
     installment or final maturity, in each case due within one year of the date
     of acquisition) other than the ABRY Subordinated Debt,

          (4)  the making of any Investment or guarantee of any Investment in
     any Person other than a Permitted Investment,

          (5)  any designation of a Restricted Subsidiary as an Unrestricted
     Subsidiary (valued at the fair market value of the net assets of such
     Restricted Subsidiary) and

          (6)  forgiveness of any Indebtedness of an Affiliate of the Company
     (other than a Restricted Subsidiary) to the Company or a Restricted
     Subsidiary of the Company.

          "Restricted Security" has the meaning set forth in Rule 144(a)(3)
promulgated under the Securities Act; provided that the Trustee shall be
                                      --------                          
entitled to request and conclusively rely upon an Opinion of Counsel with
respect to whether any Note is a Restricted Security.

          "Restricted Subsidiary" means a Subsidiary of the Company other than
an Unrestricted Subsidiary. The Board of Directors of the Company may designate
any Unrestricted Subsidiary or any Person that is to become a Subsidiary as a
Restricted Subsidiary if immediately after giving effect to such action (and
treating any Indebtedness of such Unrestricted Subsidiary or Person as having
been incurred at the time of such action),

 
                                      -38-

          (1)  the Company could have incurred at least $1.00 of additional
     Indebtedness (other than Permitted Indebtedness) pursuant to Section 4.06
     of this Indenture, and

          (2)  no Default or Event of Default shall have occurred and be
     continuing or result therefrom.

          "Rule 144A" means Rule 144A under the Securities Act, as such Rule may
be amended from time to time, or any similar rule (other than Rule 144) or
regulation hereafter adopted by the Commission.

          "Sale and Lease-Back Transaction" means any arrangement with any
Person providing for the leasing by the Company or any Restricted Subsidiary of
the Company of any real or tangible personal property, which Property has been
or is to be sold or transferred by the Company or such Restricted Subsidiary to
such Person in contemplation of such leasing.

          "S&P" means Standard & Poor's Corporation and its successors.

          "Securities Act" means the Securities Act of 1933, as amended, and the
rules and regulations of the Commission promulgated thereunder.

          "Securitization Entity" means a Wholly Owned Subsidiary of the Company
(or another Person in which the Company or any Subsidiary of the Company makes
an Investment and to which the Company or any Subsidiary of the Company
transfers accounts receivable or equipment and related assets) which engages in
no activities other than in connection with the financing of accounts receivable
or equipment and which is designated by the Board of Directors of the Company
(as provided below) as a Securitization Entity: (a) no portion of the
Indebtedness or any other obligation (contingent or otherwise) of which (i) is
guaranteed by the Company or any Subsidiary of the Company (excluding guarantees
of obligations (other than the principal of, and interest on, Indebtedness)
pursuant to Standard Securitization Undertakings), (ii) is recourse to or
obligates the Company or any Subsidiary of the Company in any way other than

 
                                      -39-

pursuant to Standard Securitization Undertakings or (iii) subjects any Property
or asset of the Company or any Subsidiary of the Company, directly or
indirectly, contingently or otherwise, to the satisfaction thereof, other than
pursuant to Standard Securitization Undertakings, (b) with which neither the
Company nor any Subsidiary of the Company has any material contract, agreement,
arrangement or understanding other than on terms no less favorable to the
Company or such Subsidiary than those that might be obtained at the time from
Persons that are not Affiliates of the Company, other than fees payable in the
ordinary course of business in connection with servicing receivables of such
entity, and (c) to which neither the Company nor any Subsidiary of the Company
has any obligation to maintain or preserve such entity's financial condition or
cause such entity to achieve certain levels of operating results. Any such
designation by the Board of Directors of the Company shall be evidenced to the
Trustee by filing with the Trustee a certified copy of the Board Resolution of
the Company giving effect to such designation and an officers' certificate
certifying that such designation complied with the foregoing conditions.

          "Senior Credit Facility" means one or more credit agreements, loan
agreements or similar agreements providing for working capital advances, term
loans, letter of credit facilities or similar advances, loans, or facilities to
Muzak LLC or any of its Subsidiaries, including the Credit and Guaranty
Agreement dated as of March 18, 1999, among Muzak LLC, Muzak LLC's subsidiaries,
the lenders party thereto in their capacities as lenders thereunder, Goldman
Sachs Credit Partners L.P., as Syndication Agent, Canadian Imperial Bank of
Commerce, as Administrative Agent, and Goldman Sachs Credit Partners L.P. and
CIBC Oppenheimer Corp., as Co-Lead Arrangers, initially providing for term loan
and revolving credit facilities including any related notes, guarantees,
collateral documents, instruments and agreements executed in connection
therewith, as such credit facilities and/or related documents may be further
amended, restated, supplemented, renewed, refinanced, replaced, restructured or
otherwise modified from time to time whether or not with the same agents,
trustee, representative lenders or group of lenders or holders, and irrespective
of any changes in 

 
                                      -40-

the terms and conditions thereof. Without limiting the generality of the
foregoing, the term "Senior Credit Facility" shall include agreements in respect
of interest rate agreements and hedging obligations with lenders party to any
Senior Credit Facility and their affiliates and shall also include any
amendment, amendment and restatement, renewal, extension, restructuring,
supplement or modification to any Senior Credit Facility and any and all
refundings, refinancings (in whole or in part) and replacements of any Senior
Credit Facility, whether by the same or any other agents, trustee,
representative lenders or lenders or group of lenders, including one or more
agreements (i) extending the maturity of, or increasing the amount of, any
Indebtedness incurred thereunder or contemplated thereby, or (ii) adding or
deleting borrowers or guarantors thereunder, so long as borrowers and issuers
include one or more of Muzak LLC and its Restricted Subsidiaries and their
respective successors and assigns,

          "Senior Subordinated Guarantees" means the guarantees of the Senior
Subordinated Notes as provided for in the Senior Subordinated Indenture.

          "Senior Subordinated Note Indenture" means the indenture pursuant to
which the Senior Subordinated Notes are issued, as the same may be amended,
restated, supplemented or otherwise modified from time to time.

          "Senior Subordinated Notes" means $115,000,000 aggregate principal
amount of 9 7/8% Senior Subordinated Notes due 2009 of Muzak LLC and Muzak
Finance, as co-issuers, issued pursuant to the Senior Subordinated Note
Indenture and the notes issued in exchange therefor pursuant to the registration
rights agreement relating thereto as in effect on the Issue Date.

          "Significant Subsidiary" means, with respect to any Person, any
Restricted Subsidiary of such Person that satisfies the criteria for a
"significant subsidiary" set forth in Rule 1.02(w) of Regulation S-X under the
Exchange Act, as such Rule is in effect on the Issue Date.

 
                                      -41-

          "Standard Securitization Undertakings" means representations,
warranties, covenants and indemnities entered into by the Company or any
Subsidiary of the Company which are reasonably customary in an accounts
receivable or equipment transaction.

          "Subsidiary" of any specified Person means any corporation,
partnership, limited liability company, joint venture, association or other
business entity, whether now existing or hereafter organized or acquired,

          (1)  in the case of a corporation, of which more than 50% of the total
     voting power of the Capital Stock entitled (without regard to the
     occurrence of any contingency) to vote in the election of directors,
     officers or trustees thereof is held by such first-named Person or any of
     its Subsidiaries; or

          (2)  in the case of a partnership, limited liability company, joint
     venture, association or other business entity, with respect to which such
     first-named Person or any of its Subsidiaries has the power to direct or
     cause the direction of the management and policies of such entity by
     contract or otherwise or if in accordance with GAAP such entity is
     consolidated with the first-named Person for financial statement purposes.

Notwithstanding the foregoing a charitable trust or foundation organized
pursuant to section 501(c)(3) of the Internal Revenue Code of 1986, as amended,
shall not be a "Subsidiary."

          "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939
(15 U.S. Code sections 77aaa-77bbbb) as in effect on the date of this Indenture
(except as provided in Section 8.03 hereof).

          "Trust Officer" means any officer of the Trustee in its Corporate
Trust Department with direct responsibility for the administration of the trusts
established hereby and, also, with respect to any particular matter, any other
officer of the Trustee to whom such matter is referred because of such offi-

 
                                      -42-

cer's knowledge of, and familiarity with, the particular subject.

          "Trustee" means the party named as such in this Indenture until a
successor replaces it pursuant to this Indenture and thereafter means the
successor.

          "Unrestricted Subsidiary" means

          (1)  any Subsidiary of an Unrestricted Subsidiary and

          (2)  any Subsidiary of the Company which is classified after the Issue
     Date as an Unrestricted Subsidiary by a Board Resolution of the Company;
     provided that a Subsidiary may be so classified as an Unrestricted
     --------     
     Subsidiary only if

          (a)  such classification is in compliance with Section 4.07 of this
     Indenture,

          (b)  immediately after giving effect to such classification, the
     Company could have incurred at least $1.00 of additional Indebtedness
     (other than Permitted Indebtedness) pursuant to Section 4.06 of this
     Indenture,

          (c)  no Default or Event of Default shall have occurred and be
     continuing or result therefrom, and

          (d)  neither the Company nor any Restricted Subsidiary shall at any
     time

               (i)   provide a guarantee of, or similar credit support to, any
          Indebtedness of such Subsidiary (including any undertaking, agreement
          or instrument evidencing such Indebtedness),

               (ii)  be directly or indirectly liable for any Indebtedness of
          such Subsidiary or

               (iii) be directly or indirectly liable for any other
          Indebtedness which provides that the holder 

 
                                      -43-

          thereof may (upon notice, lapse of time or both) declare a default
          thereon (or cause the payment thereof to be accelerated or payable
          prior to its final scheduled maturity) upon the occurrence of a
          default with respect to any other Indebtedness (other than
          Indebtedness assumed by such Subsidiary in connection with the Electro
          Systems Acquisition) that is Indebtedness of such Subsidiary
          (including any corresponding right to take enforcement action against
          such Subsidiary),

     except in the case of clause (i) or (ii) to the extent

               (i)  that the Company or such Restricted Subsidiary could
          otherwise provide such a guarantee or incur such Indebtedness (other
          than as Permitted Indebtedness) pursuant to Section 4.06 of this
          Indenture and

               (ii) the provision of such guarantee and the incurrence of such
          Indebtedness otherwise would be permitted under Section 4.07 of this
          Indenture.

The Trustee shall be given prompt notice by the Company of each Board Resolution
of the Company under this provision, together with a copy of each such Board
Resolution. Electro Systems shall be an Unrestricted Subsidiary as of the Issue
Date.

          "U.S. Government Obligations" means (a) securities that are direct
obligations of the United States of America for the payment of which its full
faith and credit are pledged or (b) obligations of a Person controlled or
supervised by and acting as an agency or instrumentality of the United States of
America, the payment of which is unconditionally guaranteed as a full faith and
credit obligation by the United States of America, which, in either case, are
not callable or redeemable at the option of the issuer thereof, and shall also
include a depository receipt issued by a bank (as defined in Section 3(a)(2) of
the Securities Act) as custodian with respect to any such U.S. Government
Obligation or a specific payment of principal of or interest on any such U.S.
Government Obligation 

 
                                      -44-

held by such custodian for the account of the holder of such depository receipt;
provided that (except as required by law) such custodian is not authorized to
- --------                                      
make any deduction from the amount payable to the holder of such depository
receipt from any amount received by the custodian in respect of the U.S.
Government Obligation or a specific payment of principal or interest on any such
U.S. Government Obligation held by such custodian for the account of the holder
of such depository receipt.

          "Weighted Average Life to Maturity" means, when applied to any
Indebtedness at any date, the number of years obtained by dividing (a) the then
outstanding aggregate principal amount of such Indebtedness into (b) the sum of
the total of the products obtained by multiplying (i) the amount of each then
remaining installment, sinking fund, serial maturity or other required payment
of principal, including payment at final maturity, in respect thereof, by (ii)
the number of years (calculated to the nearest one-twelfth) which will elapse
between such date and the making of such payment.

          "Wholly-Owned Subsidiary" means any Restricted Subsidiary, all of the
outstanding voting securities (other than directors' qualifying shares) of which
are owned, directly or indirectly, by the Company.

Section 1.01.  Other Definitions.
               ------------------

          The definitions of the following terms may be found in the sections
indicated as follows:



                            Term                                   Defined in Section
                            ----                                   ------------------     
                                                                
"Affiliate Transaction".....................................              4.10
"Agent Members".............................................              2.14
"Bankruptcy Law"............................................              6.01
"Business Day"..............................................             12.08
"Certificated Notes"........................................              2.01
"Change of Control Offer"...................................              4.16
"Change of Control Payment Date"............................              4.16
"Change of Control Purchase Price"..........................              4.15
 

 
                                      -45-

 
                                                                       
"Covenant Defeasance".......................................              9.03
"Custodian".................................................              6.01
"Event of Default"..........................................              6.01
"Excess Proceeds Offer".....................................              4.09
"Excess Proceeds Payment Date"..............................              4.09
"Global Notes"..............................................              2.01
"Guaranteed Obligations.....................................             10.01
"Legal Defeasance"..........................................              9.02
"Legal Holiday".............................................             12.08
"Paying Agent"..............................................              2.03
"Registered Exchange".......................................              2.02
"Registrar".................................................              2.03
"Regulation S Global Notes".................................              2.01
"Resale Restriction Termination Date".......................              2.15
"U.S. Global Notes".........................................              2.01


Section 1.02.  Incorporation by Reference of Trust Indenture Act.
               -------------------------------------------------

          Whenever this Indenture refers to a provision of the TIA, the portion
of such provision required to be incorporated herein in order for this Indenture
to be qualified under the TIA is incorporated by reference in and made a part of
this Indenture.  The following TIA terms used in this Indenture have the
following meanings:

          "indenture securities" means the Notes.

          "indenture securityholder" means a Noteholder.

          "indenture to be qualified" means this Indenture.

          "indenture trustee" or "institutional trustee" means the Trustee.

          "obligor on the indenture securities" means the Issuers, the
Guarantors or any other obligor on the Notes.

          All other terms used in this Indenture that are defined by the TIA,
defined in the TIA by reference to another 

 
                                      -46-

statute or defined by SEC rule have the meanings therein assigned to them.

Section 1.03.  Rules of Construction.
               --------------------- 

          Unless the context otherwise requires:

          (1)  a term has the meaning assigned to it herein, whether defined
     expressly or by reference;

          (2)  an accounting term not otherwise defined has the meaning assigned
     to it in accordance with GAAP;

          (3)  "or" is not exclusive;

          (4)  words in the singular include the plural, and in the plural
     include the singular; and

          (5)  words used herein implying any gender shall apply to every
     gender.

                                   ARTICLE 2


                                   THE NOTES

Section 2.01.  Dating; Incorporation of Form in Indenture.
               ------------------------------------------ 

          The Notes and the Trustee's certificate of authentication shall be
substantially in the form of Exhibit A which is incorporated in and made part of
this Indenture.  The Notes may have notations, legends or endorsements required
by law, stock exchange rule or usage.  The Issuers may use "CUSIP" numbers in
issuing the Notes.  The Issuers shall approve the form of the Notes.  Each Note
shall be dated the date of its authentication.

          Unless the applicable Holder requests Notes in the form of physical
certificated Notes in registered form ("Certificated Notes"), which shall be
substantially in the form of Exhibit A, Notes offered and sold in reliance on
Rule 144A or 

 
                                      -47-

in offshore transactions in reliance on Regulation S shall be issued initially
in the form of permanent Global Notes in registered form, substantially in the
form set forth in Exhibit A ("Global Notes"), deposited with the Depository,
duly executed by the Issuers and authenticated by the Trustee as hereinafter
provided and shall bear the legend set forth on Exhibit B. The aggregate
principal amount at maturity of any Global Note may from time to time be
increased or decreased by adjustments made on the records of the Depository, as
hereinafter provided.

          Notes offered and sold to Qualified Institutional Buyers in reliance
on Rule 144A issued in the form of one or more Global Notes (the "U.S. Global
Note") shall be registered in the name of the Depository or its nominee and
deposited with the Depository, duly executed by the Issuers and authenticated by
the Trustee as hereinafter provided, for credit by the Depository to the
respective accounts of beneficial owners of the Notes represented thereby (or
such other accounts as they may direct).

          Notes offered and sold in reliance on Regulation S issued in the form
of Global Notes (the "Regulation S Global Note") shall be registered in the name
of the Depository or its nominee, duly executed by the Issuers and authenticated
by the Trustee as hereinafter provided, for credit by the Depository to the
respective accounts of the beneficial owners of the Notes represented thereby
(or such other accounts as they may direct).

          The Issuers shall cause the U.S. Global Note and the Regulation S
Global Note to have separate CUSIP and ISIN numbers.

Section 2.02.  Execution and Authentication.
               ---------------------------- 

          The Notes shall be executed on behalf of the Issuers by two Officers
of each of the Issuers or an Officer and the Secretary of each of the Issuers.
Such signature may be either manual or facsimile.  The Issuers' seals may be
impressed, affixed, imprinted or reproduced on the Notes and may be in facsimile
form.

 
                                      -48-

          If an Officer whose signature is on a Note no longer holds that office
at the time the Trustee authenticates the Note, the Note shall be valid
nevertheless.

          A Note shall not be valid until the Trustee manually signs the
certificate of authentication on the Note.  Such signature shall be conclusive
evidence that the Note has been authenticated under this Indenture.

          The Trustee or an authentication agent shall authenticate Notes for
original issue in the aggregate principal amount at maturity not to exceed
$75,000,000 upon receipt of an authentication order in the form of an Officers'
Certificate.  The aggregate principal amount at maturity of Notes outstanding at
any time may not exceed $75,000,000 except as provided in Section 2.07 hereof.
Upon receipt of an authentication order in the form of an Officers' Certificate,
the Trustee shall authenticate an additional series of Notes for issuance in
exchange for all Notes previously issued pursuant to an exchange offer
registered under the Securities Act (a "Registered Exchange") or pursuant to a
Private Exchange (as defined in the Registration Rights Agreement).  Exchange
Notes (as defined in the Registration Rights Agreement) may have such
distinctive series designation and "CUSIP" numbers as and such changes in the
form thereof as are specified in the Officers' Certificate referred to in the
preceding sentence.  Exchange Notes issued pursuant to a Registered Exchange
shall not bear the Private Placement Legend.  The Notes shall be issuable only
in registered form without coupons and only in denominations of $1,000 and
integral multiples thereof.

          The Trustee may appoint an authenticating agent to authenticate Notes.
Any such appointment shall be evidenced by an instrument signed by an authorized
officer of the Trustee, a copy of which shall be furnished to the Issuers.  An
authenticating agent may authenticate Notes whenever the Trustee may do so.
Each reference in this Indenture to authentication by the Trustee includes
authentication by such agent.  An authenticating agent has the same right as an
Agent to deal with the Issuers or an Affiliate of any Issuer.

 
                                      -49-

Section 2.03.  Registrar and Paying Agent.
               -------------------------- 

          The Issuers shall maintain an office or agency where Notes may be
presented for registration of transfer or for exchange ("Registrar"), an office
or agency located in the Borough of Manhattan, City of New York, State of New
York where Notes may be presented for payment ("Paying Agent") and an office or
agency where notices and demands to or upon the Issuers in respect of the Notes
and this Indenture may be served.  The Registrar shall keep a register of the
Notes and of their transfer and exchange.  The Registrar shall provide the
Issuers a current copy of such register from time to time upon request of the
Issuers.  The Issuers may have one or more co-registrars and one or more
additional paying agents.  None of the Issuers nor any Affiliate of the Issuers
may act as Paying Agent.  The Issuers may change any Paying Agent, Registrar or
co-registrar without notice to any Noteholder.

          The Issuers shall enter into an appropriate agency agreement with any
Registrar or Paying Agent not a party to this Indenture.  The agreement shall
implement the provisions of this Indenture that relate to such Agent.  The
Issuers shall notify the Trustee of the name and address of any such Agent.  If
the Issuers fail to maintain a Registrar or Paying Agent, or agent for service
of notices and demands, or fail to give the foregoing notice, the Trustee shall
act as such.  The Issuers initially appoint the Trustee as Registrar, Paying
Agent and agent for service of notices and demands in connection with the Notes.

Section 2.04.  Paying Agent to Hold Money in Trust.
               ----------------------------------- 

          The Issuers shall require each Paying Agent other than the Trustee to
agree in writing that each Paying Agent shall hold in trust for the benefit of
the Holders or the Trustee all assets held by the Paying Agent for the payment
of Accreted Value of, premium, if any, or interest on Notes (whether such assets
have been distributed to it by the Issuers or any other obligor on the Notes),
and shall notify the Trustee in writing of any Default in making any such
payment.  The Issuers at any time may require a Paying Agent to distribute all
assets 

 
                                      -50-

held by it to the Trustee and account for any assets disbursed and the Trustee
may at any time during the continuance of any payment Default, upon written
request to a Paying Agent, require such Paying Agent to forthwith distribute to
the Trustee all assets so held in trust by such Paying Agent together with a
complete accounting of such sums. Upon doing so, the Paying Agent shall have no
further liability for such assets.

Section 2.05.  Noteholder Lists.
               ---------------- 

          The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
Noteholders.  If the Trustee is not the Registrar, the Issuers shall furnish to
the Trustee on or before each March 1 and September 1 in each year, and at such
other times as the Trustee may request in writing, a list in such form and as of
such date as the Trustee may reasonably require of the names and addresses of
Noteholders.

Section 2.06.  Transfer and Exchange.
               --------------------- 

          When a Note is presented to the Registrar with a request to register
the transfer thereof, the Registrar shall register the transfer as requested if
the requirements of applicable law are met and, when Notes are presented to the
Registrar with a request to exchange them for an equal principal amount at
maturity of Notes of other authorized denominations, the Registrar shall make
the exchange as requested; provided that every Note presented or surrendered for
                           --------                                             
registration of transfer or exchange shall be duly endorsed, or be accompanied
by a written instrument of transfer in form satisfactory to the Issuers and the
Registrar duly executed by the Holder thereof or his attorney duly authorized in
writing.  To permit transfers and exchanges, upon surrender of any Note for
registration of transfer at the office or agency maintained pursuant to Section
2.03 hereof, the Issuers shall execute and the Trustee shall authenticate Notes
at the Registrar's request.  Any exchange or transfer shall be without charge,
except that the Issuers may require payment by the Holder of a sum sufficient to
cover any tax or other governmental charge that may be imposed in relation to a
transfer or exchange, but this provision shall 

 
                                      -51-

not apply to any exchange pursuant to Sections 2.09, 3.06 or 8.05 hereof. The
Trustee shall not be required to register transfers of Notes or to exchange
Notes for a period of 15 days before selection of any Notes to be redeemed. The
Trustee shall not be required to exchange or register transfers of any Notes
called or being called for redemption in whole or in part, except the unredeemed
portion of any Note being redeemed in part.

          Any Holder of the Global Note shall, by acceptance of such Global
Note, agree that transfers of the beneficial interests in such Global Note may
be effected only through a book entry system maintained by the Depository of
such Global Note (or its agent), and that ownership of a beneficial interest in
the Global Note shall be required to be reflected in a book entry.

Section 2.07.  Replacement Notes.
               ----------------- 

          If a mutilated Note is surrendered to the Trustee or if the Holder
presents evidence to the satisfaction of the Issuers and the Trustee that the
Note has been lost, destroyed or wrongfully taken, the Issuers shall issue and
the Trustee shall authenticate a replacement Note.  An indemnity bond may be
required by the Issuers or the Trustee that is sufficient in the judgment of the
Issuers and the Trustee to protect the Issuers, the Trustee or any Agent from
any loss which any of them may suffer if a Note is replaced.  In every case of
destruction, loss or theft, the applicant shall also furnish to the Issuers and
to the Trustee evidence to their satisfaction of the destruction, loss or the
theft of such Note and the ownership thereof.  Each of the Issuers and the
Trustee may charge for its expenses in replacing a Note.  Every replacement Note
is an additional obligation of the Issuers.  In the event any such mutilated,
lost, destroyed or wrongfully taken Note has become due and payable, the Issuers
in their discretion may pay such Note instead of issuing a new Note in
replacement thereof.  The provisions of this Section 2.07 are exclusive and
shall preclude (to the extent lawful) all other rights and remedies with respect
to replacement or payment of mutilated, lost, destroyed or wrongfully taken
Notes.

 
                                      -52-

Section 2.08.  Outstanding Notes.
               ----------------- 

          Notes outstanding at any time are all Notes authenticated by the
Trustee except for those cancelled by it, those delivered to it for
cancellation, and those described in this Section 2.08 as not outstanding.

          If a Note is replaced pursuant to Section 2.07, it ceases to be
outstanding until the Issuers and the Trustee receive proof satisfactory to each
of them that the replaced Note is held by a bona fide purchaser.

          If a Paying Agent holds on a Redemption Date or Maturity Date money
sufficient to pay the Accreted Value of, premium, if any, and accrued interest
on Notes payable on that date, then on and after that date such Notes cease to
be outstanding and interest on them ceases to accrue.

          Subject to Section 12.06, a Note does not cease to be outstanding
solely because the Issuers or any Affiliate of an Issuer hold the Note.

Section 2.09.  Temporary Notes.
               --------------- 

          Until definitive Notes are ready for delivery, the Issuers may prepare
and the Trustee shall authenticate temporary Notes.  Temporary Notes shall be
substantially in the form, and shall carry all rights, of definitive Notes but
may have variations that the Issuers consider appropriate for temporary Notes.
Without unreasonable delay, the Issuers shall prepare and the Trustee shall
authenticate definitive Notes in exchange for temporary Notes presented to it.

Section 2.10.  Cancellation.
               ------------ 

          The Issuers at any time may deliver Notes to the Trustee for
cancellation.  The Registrar and the Paying Agent shall forward to the Trustee
any Notes surrendered to them for transfer, exchange or payment.  The Trustee
shall cancel and retain or, upon written request of the Issuers, may destroy or
return to the Issuers in accordance with its normal practice, 

 
                                      -53-

all Notes surrendered for transfer, exchange, payment or cancellation and if
such Notes are destroyed, deliver a certificate of destruction to the Issuers.
Subject to Section 2.07 hereof, the Issuers may not issue new Notes to replace
Notes in respect of which they have previously paid all Accreted Value, premium
and interest accrued thereon, or delivered to the Trustee for cancellation.

Section 2.11.  Defaulted Interest.
               ------------------ 

          If the Issuers default in a payment of interest on the Notes, they
shall pay the defaulted amounts, plus any interest payable on defaulted amounts
pursuant to Section 4.01 hereof, to the persons who are Noteholders on a
subsequent special record date.  The Issuers shall fix the special record date
and payment date in a manner satisfactory to the Trustee and provide the Trustee
at least 20 days notice of the proposed amount of defaulted interest to be paid
and the special payment date.  At least 15 days before the special record date,
the Issuers shall mail or cause to be mailed to each Noteholder at its address
as it appears on the Notes register maintained by the Registrar a notice that
states the special record date, the payment date (which shall be not less than
five nor more than ten days after the special record date), and the amount to be
paid.  In lieu of the foregoing procedures, the Issuers may pay defaulted
interest in any other lawful manner satisfactory to the Trustee.

Section 2.12.  Deposit of Moneys.
               ----------------- 

          Prior to 10:00 a.m., New York City time, on each Interest Payment
Date, Redemption Date and Maturity Date, the Issuers shall have deposited with
the Paying Agent in immediately available funds U.S. legal tender sufficient to
make payments, if any, due on such Interest Payment Date, Redemption Date or
Maturity Date, as the case may be, in a timely manner which permits the Trustee
to remit payment to the Holders on such Interest Payment Date, Redemption Date
or Maturity Date, as the case may be.  The Accreted Value and interest on Global
Notes shall be payable to the Depository or its nominee, as the case may be, as
the sole registered owner and the sole holder of the 

 
                                      -54-

Global Notes represented thereby. The Accreted Value and interest on Notes in
certificated form shall be payable at the office of the Paying Agent.

Section 2.13.  CUSIP Number.
               ------------ 

          The Issuers in issuing the Notes may use one or more "CUSIP" numbers,
and if so, the Trustee shall use such CUSIP numbers in notices of redemption or
exchange as a convenience to Holders, provided that any such notice may state
                                      --------                               
that no representation is made as to the correctness or accuracy of the CUSIP
numbers printed in the notice or on the Notes, and that reliance may be placed
only on the other identification numbers printed on the Notes.

Section 2.14.  Book-Entry Provisions for Global Notes.
               -------------------------------------- 

          (a)  The Global Notes initially shall (i) be registered in the name of
the Depository or the nominee of such Depository and (ii) bear legends as set
forth in Exhibit B.

          Members of, or participants in, the Depository ("Agent Members") shall
have no rights under this Indenture with respect to any Global Note held on
their behalf by the Depository or under the Global Note, and the Depository may
be treated by the Issuers, the Trustee and any agent of the Issuers or the
Trustee as the absolute owner of the Global Note for all purposes whatsoever.
Notwithstanding the foregoing, nothing herein shall prevent the Issuers, the
Trustee or any agent of the Issuers or the Trustee from giving effect to any
written certification, proxy or other authorization furnished by the Depository
or impair, as between the Depository and its Agent Members, the operation of
customary practices governing the exercise of the rights of a Holder.

          (b)  Interests of beneficial owners in the Global Notes may be
transferred or exchanged for Certificated Notes in accordance with the rules and
procedures of the Depository and the provisions of Section 2.15.  In addition,
Certificated Notes shall be transferred to all beneficial owners in exchange for
their beneficial interests in Global Notes if (i) the De-

 
                                      -55-

pository (x) notifies the Issuers that it is unwilling or unable to continue as
Depository for any Global Note or (y) has ceased to be a clearing company
registered under the Exchange Act and, in each case, a successor depositary is
not appointed by the Issuers within 90 days of such notice, (ii) the Issuers, at
their option, notify the Trustee in writing that they elect to cause the
issuance of Certificated Notes, or (iii) a Default or an Event of Default has
occurred and is continuing and the Registrar has received a written request from
the Depository to issue Certificated Notes.

          (c)  In connection with any transfer or exchange of a portion of the
beneficial interest in any Global Note to beneficial owners pursuant to
paragraph (b), the Registrar shall (if one or more Certificated Notes are to be
issued) reflect on its books and records the date and a decrease in the
principal amount at maturity of the Global Note in an amount equal to the
principal amount at maturity of the beneficial interest in the Global Note to be
transferred, and the Issuers shall execute, and the Trustee shall upon receipt
of a written order from the Issuers authenticate and make available for
delivery, one or more Certificated Notes of like tenor and amount.

          (d)  In connection with the transfer of Global Notes as an entirety to
beneficial owners pursuant to paragraph (b), the Global Notes shall be deemed to
be surrendered to the Trustee for cancellation, and the Issuers shall execute,
and the Trustee shall, upon receipt of an authentication order from the Issuers
in the form of an Officers' Certificate, authenticate and deliver, to each
beneficial owner identified by the Depository in writing in exchange for its
beneficial interest in the Global Notes, an equal aggregate principal amount at
maturity of Certificated Notes of authorized denominations.

          (e)  Any Certificated Note constituting a Restricted Security
delivered in exchange for an interest in a Global Note pursuant to paragraph
(b), (c) or (d) shall, except as otherwise provided by Section 2.15, bear the
Private Placement Legend.

 
                                      -56-

          (f)  The Holder of any Global Note may grant proxies and otherwise
authorize any Person, including Agent Members and Persons that may hold
interests through Agent Members, to take any action which a Holder is entitled
to take under this Indenture or the Notes.

Section 2.15.  Registration of Transfers and Exchanges.
               --------------------------------------- 

          (a)  Transfer and Exchange of Certificated Notes.  When Certificated
               -------------------------------------------                    
Notes are presented to the Registrar or co-Registrar with a request:

          (i)  to register the transfer of the Certificated Notes; or

          (ii) to exchange such Certificated Notes for an equal principal
     amount at maturity of Certificated Notes of other authorized denominations,

the Registrar or co-Registrar shall register the transfer or make the exchange
as requested if the requirements under this Indenture as set forth in this
Section 2.15 for such transactions are met; provided, however, that the
                                            --------  -------          
Certificated Notes presented or surrendered for registration of transfer or
exchange:

          (I)  shall be duly endorsed or accompanied by a written instrument of
     transfer in form satisfactory to the Registrar or co-Registrar, duly
     executed by the Holder thereof or his attorney duly authorized in writing;
     and

          (II) in the case of Certificated Notes the offer and sale of which
     have not been registered under the Securities Act and are presented for
     transfer or exchange prior to (x) the date which is two years after the
     later of the date of original issue and the last date on which any Issuer
     or any Affiliate of an Issuer was the owner of such Note, or any
     predecessor thereto and (y) such later date, if any, as may be required by
     any subsequent change in applicable law (the "Resale Restriction
     Termination Date"), such Certificated Notes shall be accompanied, in the
     sole 

 
                                      -57-

     discretion of the Issuers, by the following additional information and
     documents, as applicable:

               (A) if such Certificated Note is being delivered to the Registrar
          or co-Registrar by a Holder for registration in the name of such
          Holder, without transfer, a certification from such Holder to that
          effect (substantially in the form of Exhibit C hereto); or
                                               ---------            

               (B) if such Certificated Note is being transferred to a Qualified
          Institutional Buyer in accordance with Rule 144A, a certification to
          that effect (substantially in the form of Exhibit C hereto); or
                                                    ---------            

               (C) if such Certificated Note is being transferred in reliance on
          Regulation S, delivery of a certification to that effect
          (substantially in the form of Exhibit C hereto) and a transferor
                                        ---------                         
          certificate for Regulation S transfers substantially in the form of
          Exhibit D-1 hereto; or
          -----------           

               (D) if such Certificated Note is being transferred to an
          Institutional Accredited Investor, delivery of certification
          substantially in the form of Exhibit C hereto, a certificate of the
                                       ---------                             
          transferee in substantially the form of Exhibit D-2 and an Opinion of
                                                  -----------                  
          Counsel and/or other information reasonably satisfactory to the
          Issuers to the effect that such transfer is in compliance with the
          Securities Act; or

               (E) if such Certificated Note is being transferred in reliance on
          Rule 144 under the Securities Act, delivery of a certification to that
          effect substantially in the form of Exhibit C hereto; or
                                              ---------           

               (F) if such Certificated Note is being transferred in reliance on
          another exemption from the registration requirements of the Securities
          Act, a certification to that effect (substantially in the form of
          Exhibit C hereto) and an Opinion of Counsel rea-
          ---------                                                           

 
                                      -58-

          sonably acceptable to the Issuers to the effect that such transfer is
          in compliance with the Securities Act.

          (b) Restrictions on Transfer of a Certificated Note for a Beneficial
              ----------------------------------------------------------------
Interest in a Global Note.  A Certificated Note may not be exchanged for a
- -------------------------                                                 
beneficial interest in a Global Note except upon satisfaction of the
requirements set forth below.  Upon receipt by the Registrar or co-Registrar of
a Certificated Note, duly endorsed or accompanied by appropriate instruments of
transfer, in form satisfactory to the Registrar or co-Registrar, together with:

          (A) in the case of Certificated Notes, the offer and sale of which
     have not been registered under the Securities Act and which are presented
     for transfer prior to the Resale Restriction Termination Date,
     certification, substantially in the form of Exhibit C hereto, that such
                                                 ---------                  
     Certificated Note is being transferred (I) to a Qualified Institutional
     Buyer or (II) in an offshore transaction in reliance on Regulation S (and
     in the case of this clause II, the Issuers shall have received a transferor
     certificate for Regulation S transfers substantially in the form of Exhibit
                                                                         -------
     D-1 hereto); and
     ---             

          (B) written instructions from the Holder thereof directing the
     Registrar or co-Registrar to make, or to direct the Depository to make, an
     endorsement on the applicable Global Note to reflect an increase in the
     aggregate principal amount at maturity of the Notes represented by the
     Global Note,

then the Registrar or co-Registrar shall cancel such Certificated Note and
cause, or direct the Depository to cause, in accordance with the standing
instructions and procedures existing between the Depository and the Registrar or
co-Registrar, the principal amount at maturity of Notes represented by the
applicable Global Note to be increased accordingly.  If no Global Note
representing Notes held by Qualified Institutional Buyers or Persons acquiring
Notes in offshore transactions in reliance on Regulation S, as the case may be,
is then outstanding, the 

 
                                      -59-

Issuers shall issue and the Trustee shall, upon receipt of an authentication
order in the form of an Officers' Certificate in accordance with Section 2.02,
authenticate such a Global Note in the appropriate principal amount at maturity.

          (c) Transfer and Exchange of Global Notes.  The transfer and exchange
              -------------------------------------                            
of Global Notes or beneficial interests therein shall be effected through the
Depository in accordance with this Indenture (including the restrictions on
transfer set forth herein) and the procedures of the Depository therefor.  Upon
receipt by the Registrar or co-Registrar of written instructions, or such other
instruction as is customary for the Depository, from the Depository or its
nominee, requesting the registration of transfer of an interest in a U.S. Global
Note or Regulation S Global Note, as the case may be, to another type of Global
Note, together with the applicable Global Notes (or, if the applicable type of
Global Note required to represent the interest as requested to be transferred is
not then outstanding, only the Global Note representing the interest being
transferred), the Registrar or Co-Registrar shall cancel such Global Notes (or
Global Note) and the Issuers shall issue and the Trustee shall, upon receipt of
an authentication order in the form of an Officers' Certificate in accordance
with Section 2.02, authenticate new Global Notes of the types so cancelled (or
the type so cancelled and applicable type required to represent the interest as
requested to be transferred) reflecting the applicable increase and decrease of
the principal amount at maturity of Notes represented by such types of Global
Notes, giving effect to such transfer.  If the applicable type of Global Note
required to represent the interest as requested to be transferred is not
outstanding at the time of such request, the Issuers shall issue and the Trustee
shall, upon written instructions from the Issuers in accordance with Section
2.02, authenticate a new Global Note of such type in principal amount at
maturity equal to the principal amount at maturity of the interest requested to
be transferred.

          (d) Transfer of a Beneficial Interest in a Global Note for a
              --------------------------------------------------------
Certificated Note.  (i) Any Person having a beneficial interest in a Global Note
- -----------------                                                               
may upon request exchange such 

 
                                      -60-

beneficial interest for a Certificated Note. Upon receipt by the Registrar or 
co-Registrar of written instructions, or such other form of instructions as is
customary for the Depository, from the Depository or its nominee on behalf of
any Person having a beneficial interest in a Global Note and upon receipt by the
Trustee of a written order or such other form of instructions as is customary
for the Depository or the Person designated by the Depository as having such a
beneficial interest containing registration instructions and, in the case of any
such transfer or exchange of a beneficial interest in Notes the offer and sale
of which have not been registered under the Securities Act and which Notes are
presented for transfer or exchange prior to the Resale Restriction Termination
Date, the following additional information and documents:

          (A) if such beneficial interest is being transferred to the Person
     designated by the Depository as being the beneficial owner, a certification
     from such Person to that effect (substantially in the form of Exhibit C
                                                                   ---------
     hereto); or

          (B) if such beneficial interest is being transferred to a Qualified
     Institutional Buyer in accordance with Rule l44A, a certification to that
     effect (substantially in the form of Exhibit C hereto); or
                                          ---------            

          (C) if such beneficial interest is being transferred in reliance on
     Regulation S, delivery of a certification to that effect (substantially in
     the form of Exhibit C hereto) and a transferor certificate for Regulation S
                 ---------                                                      
     transfers substantially in the form of Exhibit D-1 hereto; or
                                            -----------           

          (D) if such beneficial interest is being transferred to an
     Institutional Accredited Investor, delivery of certification substantially
     in the form of Exhibit C hereto, a certificate of the transferee in
                    ---------                                           
     substantially the form of Exhibit D-2 and an Opinion of Counsel and/or
                               -----------                                 
     other information reasonably satisfactory to the Issuers to the effect that
     such transfer is in compliance with the Securities Act; or

 
                                      -61-

          (E)  if such beneficial interest is being transferred in reliance on
     Rule 144 under the Securities Act, delivery of a certification to that
     effect substantially in the form of Exhibit C hereto; or
                                         ---------           

          (F)  if such beneficial interest is being transferred in reliance on
     another exemption from the registration requirements of the Securities Act,
     a certification to that effect (substantially in the form of Exhibit C
                                                                  ---------
     hereto) and an Opinion of Counsel reasonably satisfactory to the Issuers to
     the effect that such transfer is in compliance with the Securities Act,

then the Registrar or co-Registrar will cause, in accordance with the standing
instructions and procedures existing between the Depository and the Registrar or
co-Registrar, the aggregate principal amount at maturity of the applicable
Global Note to be reduced and, following such reduction, the Issuers will
execute and, upon receipt of an authentication order in the form of an Officers'
Certificate in accordance with Section 2.02, the Trustee will authenticate and
deliver to the transferee a Certificated Note in the appropriate principal
amount at maturity.

          (ii) Certificated Notes issued in exchange for a beneficial interest
in a Global Note pursuant to this Section 2.15(d) shall be registered in such
names and in such authorized denominations as the Depository, pursuant to
instructions from its direct or indirect participants or otherwise, shall
instruct the Registrar or co-Registrar in writing.  The Registrar or co-
Registrar shall deliver such Certificated Notes to the Persons in whose names
such Certificated Notes are so registered.

          (e)  Restrictions on Transfer and Exchange of Global Notes.
               -----------------------------------------------------  
Notwithstanding any other provisions of this Indenture, a Global Note may not be
transferred as a whole except by the Depository to a nominee of the Depository
or by a nominee of the Depository to the Depository or another nominee of the
Depository or by the Depository or any such nominee to a successor Depository or
a nominee of such successor Depository.

 
                                      -62-

          (f) Private Placement Legend.  Upon the transfer, exchange or
              ------------------------                                 
replacement of Notes not bearing the Private Placement Legend, the Registrar or
co-Registrar shall deliver Notes that do not bear the Private Placement Legend.
Upon the transfer, exchange or replacement of Notes bearing the Private
Placement Legend, the Registrar or co-Registrar shall deliver only Notes that
bear the Private Placement Legend unless, and the Trustee is hereby authorized
to deliver Notes without the Private Placement Legend if, (i) the Resale
Restriction Termination Date shall have occurred, (ii) there is delivered to the
Trustee an Opinion of Counsel reasonably satisfactory to the Issuers and the
Trustee to the effect that neither such legend nor the related restrictions on
transfer are required in order to maintain compliance with the provisions of the
Securities Act or (iii) such Note has been sold pursuant to an effective
registration statement under the Securities Act.

          (g) General.  By its acceptance of any Note bearing the Private
              -------                                                    
Placement Legend, each Holder of such a Note acknowledges the restrictions on
transfer of such Note set forth in this Indenture and in the Private Placement
Legend and agrees that it will transfer such Note only as provided in this
Indenture.

          The Registrar shall retain copies of all letters, notices and other
written communications received pursuant to Section 2.14 or this Section 2.15.
The Issuers shall have the right to inspect and make copies of all such letters,
notices or other written communications at any reasonable time upon the giving
of reasonable written notice to the Registrar.

Section 2.16. Joint and Several Liability.
              --------------------------- 

          Except as otherwise expressly provided herein, the Issuers shall be
jointly and severally liable for the performance of all obligations and
covenants under this Indenture and the Notes.

 
                                      -63-

                                   ARTICLE 3

                                  REDEMPTION

Section 3.01.  Notices to Trustee.
               ------------------ 

          If the Issuers elect to redeem Notes pursuant to Section 3.07 hereof,
at least 60 days prior to the Redemption Date or during such other period as the
Trustee may agree to, the Issuers shall notify the Trustee in writing of the
Redemption Date, the principal amount at maturity of Notes to be redeemed and
the redemption price, and deliver to the Trustee an Officers' Certificate
stating that such redemption will comply with the conditions contained in
Section 3.07 hereof, as appropriate.

Section 3.02.  Selection by Trustee of Notes to Be Redeemed.
               -------------------------------------------- 

          In the event that less than all of the Notes are to be redeemed at any
time, selection of the Notes for redemption will be made by the Trustee in
compliance with the requirements of the principal national securities exchange,
if any, on which the Notes are listed or, if the Notes are not listed on a
national securities exchange, on a pro rata basis, by lot or by such method as
                                   --------                                   
the Trustee shall deem fair and appropriate; provided, that no Notes of $1,000
                                             --------                         
principal amount at maturity or less shall be redeemed in part.  The Trustee may
select for redemption portions of the principal of the Notes that have
denominations larger than $1,000.  The Trustee shall promptly notify the Issuers
of the Notes selected for redemption and, in the case of any Notes selected for
partial redemption, the principal amount at maturity thereof to be redeemed.
For all purposes of this Indenture unless the context otherwise requires,
provisions of this Indenture that apply to Notes called for redemption also
apply to portions of Notes called for redemption.

 
                                      -64-

Section 3.03.  Notice of Redemption.
               -------------------- 

          Notice of redemption shall be mailed by first class mail at least 30
but not more than 60 calendar days before the Redemption Date to each Holder of
Notes to be redeemed at its registered address.  If any Note is to be redeemed
in part only, the notice of redemption that relates to such Note shall state the
portion of the principal amount at maturity thereof to be redeemed.

          The notice shall identify the Notes to be redeemed (including the
CUSIP number(s) thereof) and shall state:

          (1)  the Redemption Date;

          (2)  the redemption price and the amount of accrued interest, if any,
     to be paid;

          (3)  that, if any Note is being redeemed in part, the portion of the
     principal amount at maturity (equal to $1,000 in principal amount at
     maturity or any integral multiple thereof) of such Note to be redeemed and
     that, on and after the Redemption Date, upon surrender of such Note, a new
     Note or Notes in principal amount at maturity equal to the unredeemed
     portion thereof will be issued;

          (4)  the name, address and telephone number of the Paying Agent;

          (5)  that Notes called for redemption must be surrendered to the
     Paying Agent at the address specified to collect the redemption price plus
     accrued interest, if any;

          (6)  that, unless the Issuers default in making the redemption
     payment, Accreted Value or interest on Notes called for redemption ceases
     to accrete or accrue, as the case may be, on and after the Redemption Date
     and the only remaining right of the Holders is to receive payment of the
     redemption price plus accrued interest to the Redemption Date, if any, upon
     surrender of the Notes to the Paying Agent;

 
                                      -65-

          (7)  the paragraph of Section 3.07 hereof pursuant to which the Notes
     called for redemption are being redeemed; and

          (8)  the aggregate principal amount at maturity of Notes that are
     being redeemed.

Section 3.04.  Effect of Notice of Redemption.
               ------------------------------ 

          Once the notice of redemption described in Section 3.03 is mailed,
Notes called for redemption become due and payable on the Redemption Date and at
the redemption price, including any premium, plus accrued interest to the
Redemption Date, if any.  Upon surrender to the Paying Agent, such Notes shall
be paid at the redemption price, including any premium, plus accrued interest to
the Redemption Date, if any, provided that if the Redemption Date is after a
                             --------                                       
regular interest payment record date and on or prior to the Interest Payment
Date, the accrued interest shall be payable to the Holder of the redeemed Notes
registered on the relevant record date.

Section 3.05.  Deposit of Redemption Price.
               --------------------------- 

          On or prior to 10:00 a.m., New York City time, on each Redemption
Date, the Issuers shall have deposited with the Paying Agent in immediately
available funds U.S. legal tender sufficient to pay the redemption price of and
accrued interest on all Notes to be redeemed on that date.

          On and after any Redemption Date, if U.S. legal tender sufficient to
pay the redemption price of and accrued interest, if any, on Notes called for
redemption shall have been made available in accordance with the preceding
paragraph, the Notes called for redemption will cease to accrete Accreted Value
and cease to accrue interest, if any, and the only right of the Holders of such
Notes will be to receive payment of the redemption price of and, subject to the
first proviso in Section 3.04, accrued and unpaid interest, if any, on such
Notes to the Redemption Date.  If any Note called for redemption shall not be so
paid, Accreted Value or interest will continue to accrete or accrue, as the case
may be, from the Redemption 

 
                                      -66-

Date until such redemption payment is made, on the unpaid Accreted Value of the
Note and any interest not paid on such unpaid Accreted Value, in each case, at
the rate and in the manner provided in the Notes.

Section 3.06.  Notes Redeemed in Part.
               ---------------------- 

          Upon surrender of a Note that is redeemed in part, the Trustee shall
authenticate for a Holder a new Note equal in principal amount at maturity to
the unredeemed portion of the Note surrendered.

Section 3.07.  Optional Redemption.
               --------------------

          (a)  The Issuers may redeem the Notes that are redeemable at their
option, in whole at any time or in part from time to time on or after March 15,
2004 at the redemption prices (expressed as percentages of the principal amount
at maturity thereof), set forth below plus accrued and unpaid interest, if any,
to the Redemption Date, if redeemed during the twelve-month period beginning on
March 15 of each year indicated below:



          Year                                                  Percentage     
          ----                                                  ----------      
                                                                             
          2004............................................       106.500%
          2005............................................       104.333%
          2006............................................       102.167%
          2007 and thereafter.............................       100.000% 


          (b)  The Issuers may redeem up to 35% of the aggregate principal
amount at maturity of the Notes originally issued under the Indenture, at any
time and from time to time prior to March 15, 2002, at a redemption price equal
to 113% of the Accreted Value thereof out of the net cash proceeds of one or
more Equity Offerings; provided, that at least 65% of the aggregate principal
                       --------                                              
amount at maturity of the Notes originally issued under the Indenture remains
outstanding immediately after any such redemption (it being expressly agreed
that for purposes of determining whether this condition is satisfied, Notes
owned by the Issuers or any of its Affiliates shall be 

 
                                      -67-

deemed not to be outstanding). In order to effect the foregoing redemption with
the proceeds of any Equity Offering, the Issuers shall make such redemption not
more than 60 days following the closing of any such Equity Offering.


                                   ARTICLE 4

                                   COVENANTS

Section 4.01.  Payment of Notes.
               ---------------- 

          The Issuers shall pay the Accreted Value of and interest (including
all Additional Interest (as defined in the Registration Rights Agreement) as
provided in the Registration Rights Agreement on the Notes on the dates and in
the manner provided in the Notes and this Indenture.  An installment of Accreted
Value or interest shall be considered paid on the date it is due if the Trustee
or Paying Agent holds, for the benefit of the Holders, on that date U.S. legal
tender designated for and sufficient to pay such installment.

          The Issuers shall pay interest on overdue principal (including post-
petition interest in a proceeding under any Bankruptcy Law), and interest on
overdue interest, to the extent lawful, at the rate specified in the Notes.

Section 4.02.  Provision of Financial Statements and Other Information.
               -------------------------------------------------------

          (a)  Commencing with the first fiscal quarter of the Company ending
after the Issue Date, the Issuers will file with the Commission all information,
documents and reports required to be filed with the Commission pursuant to
Section 13 or 15(d) of the Exchange Act and will provide the Trustee and the
Noteholders with copies of all such information, documents and reports within 15
days of filing thereof with the Commission; provided that if the Issuers are not
                                            --------                            
required to file such information, documents or reports with the Commission,
they will nonetheless continue to furnish such information, documents and

 
                                      -68-

reports required to be filed by issuers subject to the reporting requirements of
Section 13 or 15(d) of the Exchange Act to the Trustee and the Noteholders
within 15 days of the date on which filing with the Commission would have been
required.  The Issuers shall also comply with the provisions of TIA (S) 314(a).
The Trustee shall retain such reports, information and documents at its
Corporate Trust Office and permit any Noteholder to examine such material upon
prior written request at reasonable times.  Except to determine whether the
Issuers have complied with the provisions of this Section 4.02, the Trustee
shall not be required to examine or review such material or any of it and shall
not be considered to have had notice, constructive or otherwise, from anything
set forth in such material of any Default or other fact or event which might
require the Trustee to take any action or give any notice hereunder.

          (b) The Issuers will, upon request, provide to any Holder or any
prospective transferee of any such Holder any information concerning the Issuers
(including financial statements) necessary in order to permit such Holder to
sell or transfer Notes in compliance with Rule 144 and Rule 144A under the
Securities Act.

Section 4.03. Waiver of Stay, Extension or Usury Laws.
              --------------------------------------- 

          The Issuers covenant (to the extent that they may lawfully do so) that
they will not at any time insist upon, or plead (as a defense or otherwise) or
in any manner whatsoever claim or take the benefit or advantage of, any stay or
extension law or any usury law or other law which would prohibit or forgive the
Issuers from paying all or any portion of the Accreted Value of, premium, if
any, and/or interest on the Notes as contemplated herein, wherever enacted, now
or at any time hereafter in force, or which may affect the covenants or the
performance of this Indenture; and (to the extent that they may lawfully do so)
the Issuers hereby expressly waive all benefit or advantage of any such law, and
covenant that they will not hinder, delay or impede the execution of any power
herein granted to the Trustee, but will suffer and permit the execution of every
such power as though no such law had been enacted.

 
                                      -69-

Section 4.04.  Compliance Certificate; Notice of Default; Tax Information.
               ----------------------------------------------------------

          (a)  The Issuers shall deliver to the Trustee, within 120 days after
the end of each fiscal year an Officers' Certificate (one of the signers of
which shall be the principal executive officer, principal financial officer or
principal accounting officer of each Issuer) stating that a review of the
activities of the Issuers and their Subsidiaries during such fiscal year has
been made under the supervision of the signing Officers with a view to
determining whether the Issuers have kept, observed, performed and fulfilled
their obligations under this Indenture, and further stating, as to each such
Officer signing such certificate, that to the best of his or her knowledge the
Issuers have kept, observed, performed and fulfilled each and every covenant
contained in this Indenture and, in the case of Restricted Payments, listing all
Restricted Payments for such quarter, and are not in default in the performance
or observance of any of the terms, provisions and conditions hereof (or, if a
Default or Event of Default shall have occurred, describing all or such Defaults
or Events of Default of which he or she may have knowledge and what action each
is taking or proposes to take with respect thereto) and that to the best of his
or her knowledge no event has occurred and remains in existence by reason of
which payments on account of the Accreted Value of or interest, if any, on the
Notes are prohibited or if such event has occurred, a description of the event
and what action the Issuers are taking or propose to take with respect thereto.

          (b)  The Issuers will, so long as any of the Notes are outstanding,
deliver to the Trustee, forthwith upon any Officer becoming aware of any Default
or Event of Default, an Officers' Certificate specifying such Default or Event
of Default and what action the Issuers is taking or proposes to take with
respect thereto.

          (c)  The annual financial statements delivered pursuant to Section
4.02 shall be accompanied by a written report of the Issuers' independent
accountants (who shall be a firm of established national reputation) that in
conducting their audit

 
                                      -70-

of such financial statements nothing has come to their attention that would lead
them to believe that any Issuer has violated any material provisions of Article
Four, Five or Six of this Indenture insofar as they relate to accounting matters
or, if any such violation has occurred, specifying the nature and period of
existence thereof, it being understood that such accountants shall not be liable
directly or indirectly to any Person for any failure to obtain knowledge of any
such violation.

          (d)  The Issuers shall file with the Trustee promptly at the end of
each calendar year (i) a written notice specifying the amount of the original
issue discount (including daily rates and accrual periods) accrued on
outstanding Notes as of the end of such year and (ii) such other specific
information relating to such original issue discount as may then be relevant
under the Internal Revenue Code of 1986, as amended from time to time.

Section 4.05.  Taxes.
               ----- 

          The Issuers shall, and shall cause each of their Subsidiaries to, pay
prior to delinquency all material taxes, assessments, and governmental levies
except as contested in good faith and by appropriate proceedings.

Section 4.06.  Limitation on Additional Indebtedness.
               ------------------------------------- 

          (a)  The Company will not, and will not permit any of its Restricted
Subsidiaries to, directly or indirectly, incur (as defined) any Indebtedness
(including Acquired Indebtedness); provided that if no Default or Event of
                                   --------                               
Default shall have occurred and be continuing at the time or as a consequence of
the incurrence of such Indebtedness, the Company and any of its Restricted
Subsidiaries may incur Indebtedness (including Acquired Indebtedness) if after
giving effect to the incurrence of such Indebtedness and the receipt and
application of the proceeds thereof, the Company's Consolidated Leverage Ratio
is less than 7.5 to 1 if such Indebtedness is incurred on or before March 15,
2001 and 7.0 to 1 if such Indebtedness is incurred thereafter.

 
                                      -71-

          (b)  Notwithstanding the foregoing clause (a), the Company and its
Restricted Subsidiaries may incur Permitted Indebtedness. For purposes of
determining compliance with this Section 4.06, in the event that an item of
proposed Indebtedness meets the criteria of more than one of the categories of
Permitted Indebtedness as of the date of incurrence thereof or is entitled to be
incurred pursuant to the first paragraph of this covenant as of the date of
incurrence thereof, the Company shall, in its sole discretion, classify or
reclassify such item of Indebtedness in any manner that complies with this
covenant. Accrual of interest, the accretion of accreted value and the payment
of interest in the form of additional Indebtedness will not be deemed to be an
incurrence of Indebtedness for purposes of this covenant and the payment of
dividends on Disqualified Capital Stock in the form of additional shares of the
same class of Disqualified Capital Stock will not be deemed an issuance of
Disqualified Capital Stock.

          (c)  The Company will not incur any Indebtedness which by its terms
(or by the terms of any agreement governing such Indebtedness) is subordinated
in right of payment to any other Indebtedness of the Company unless such
Indebtedness is also by its terms (or by the terms of any agreement governing
such Indebtedness) made expressly subordinate in right of payment to the Notes
pursuant to subordination provisions that are substantially identical to the
subordination provisions of such Indebtedness (or such agreement) that are most
favorable to the holders of any other Indebtedness of the Company; provided that
                                                                   --------
no Indebtedness of the Company shall be deemed to be subordinated in right of
payment to any other Indebtedness of the Company solely by virtue of being
unsecured.

Section 4.07.  Limitation on Restricted Payments.
               --------------------------------- 

          (a)  The Company will not make, and will not permit any of its
Restricted Subsidiaries to, directly or indirectly, make, any Restricted
Payment, unless:

          (1)  no Default or Event of Default shall have occurred and be
     continuing at the time of or immediately after giving effect to such
     Restricted Payment;

 
                                      -72-

          (2)  immediately after giving pro forma effect to such Restricted
                                        --- -----                          
     Payment, the Company could incur $1.00 of additional Indebtedness (other
     than Permitted Indebtedness) under Section 4.06 of this Indenture; and

          (3)  immediately after giving effect to such Restricted Payment, the
     aggregate of all Restricted Payments declared or made after the Issue Date
     does not exceed the sum of

               (a)  100% of the Company's Cumulative EBITDA (or, in the event
          that such Cumulative EBITDA shall be a deficit, minus 100% of such
          deficit) minus 1.4 times the Company's Cumulative Consolidated
          Interest Expense,

               (b)  100% of the aggregate net cash proceeds received by the
          Company from the issue or sale after the Issue Date of Capital Stock
          (other than Disqualified Capital Stock or Capital Stock of the Company
          issued to any Subsidiary of the Company) of the Company or any
          Indebtedness or other securities of the Company convertible into or
          exercisable or exchangeable for Capital Stock (other than Disqualified
          Capital Stock) of the Company which have been so converted, exercised
          or exchanged, as the case may be,

               (c)  without duplication of any amounts included in clause (3)(b)
          above, 100% of the aggregate net proceeds (including the fair market
          value of Property other than cash) received by the Company from any
          equity contribution from a holder of the Company's Capital Stock,
          excluding, in the case of clauses (3)(b) and (c), (i) any net proceeds
          from an Equity Offering to the extent used to redeem the Notes and
          (ii) any net proceeds directly or indirectly received in connection
          with the Pending Capstar Acquisition, and

               (d)  without duplication, the sum of

 
                                      -73-

                       (i)   the aggregate amount returned in cash on or with
               respect to Investments (other than Permitted Investments) made
               subsequent to the Issue Date whether through interest payments,
               principal payments, dividends or other distributions;

                       (ii)  the net proceeds received by the Company or any of
               its Restricted Subsidiaries from the disposition, retirement or
               redemption of all or any portion of such Investments (other than
               to a Subsidiary of the Company); and

                       (iii) upon redesignation of an Unrestricted Subsidiary
               as a Restricted Subsidiary, the fair market value of the net
               assets of such Subsidiary;

provided, however, that the sum of clauses (d)(i), (ii) and (iii) above shall
- --------  -------                                                            
not exceed the aggregate amount of all such Investments made subsequent to the
Issue Date.

          For purposes of determining under clause (3) above the amount expended
for Restricted Payments, cash distributed shall be valued at the face amount
thereof and Property other than cash shall be valued at its fair market value.

          (b)  The provisions of this Section 4.07 shall not prohibit

          (1)  the payment of any distribution within 60 days after the date of
     declaration thereof, if at such date of declaration such payment would
     comply with the provisions of this Indenture,

          (2)  the repurchase, redemption, defeasance or other acquisition or
     retirement of any shares of Capital Stock of the Company or of Indebtedness
     that is subordinated to the Notes by conversion into, or by or in exchange
     for, shares of Capital Stock of the Company (other than Disqualified
     Capital Stock), or out of the net cash proceeds

 
                                      -74-

     of the substantially concurrent sale (other than to a Subsidiary of the
     Company) of other shares of Capital Stock of the Company (other than
     Disqualified Capital Stock),

          (3)  the redemption, repurchase, defeasance, retirement or other
     acquisition of Indebtedness of the Company that is subordinated to the
     Notes in exchange for, by conversion into, or out of the net cash proceeds
     of a substantially concurrent sale or incurrence of, Indebtedness of the
     Company (other than any Indebtedness owed to a Subsidiary) that is
     Refinancing Indebtedness,

          (4)  the retirement of any shares of Disqualified Capital Stock of the
     Company by conversion into, or by exchange for, shares of Disqualified
     Capital Stock of the Company, or out of the net cash proceeds of the
     substantially concurrent sale (other than to a Subsidiary of the Company)
     of other shares of Disqualified Capital Stock of the Company,

          (5)  the payment of any dividend or distribution to the extent
     necessary to permit direct or indirect beneficial owners of shares of
     Capital Stock of the Company to pay federal, state or local income tax
     liabilities arising from income of the Company and attributable to them
     solely as a result of the Company (and any intermediate entity through
     which the holder owns such shares) being a limited liability company,
     partnership or similar entity for federal income tax purposes (collectively
     "Permitted Tax Distributions"),

          (6)  the repurchase, redemption or other acquisition or retirement for
     value of any Capital Stock of the Company held by any current or former
     members of the management of the Company (or any of its Restricted
     Subsidiaries) pursuant to any management equity subscription or purchase
     agreement, members agreement, securityholders agreement or stock option
     agreement or similar agreement, in an aggregate amount not to exceed $2
     million in any fiscal year (which amount shall be increased by the amount
     of any proceeds to the Company from (x) without duplica-

 
                                      -75-

     tion of any amounts included in clauses 3(b) and (c) of subsection (a)
     above, sales of Capital Stock (other than Disqualified Capital Stock) of
     the Company (which net proceeds have been contributed by the Company) to
     management or other employees subsequent to the Issue Date and (y) any 
     "key-man" life insurance policies which are used to make such redemptions
     or repurchases); provided, that the cancellation of Indebtedness owing to
                      --------
     the Company from management or other employees of the Company or any of its
     Restricted Subsidiaries in connection with a repurchase of Capital Stock of
     the Company will not be deemed to constitute a Restricted Payment under
     this Indenture,

          (7)  any payments or distributions or other transactions to be made in
     connection with the Merger Transactions, the Electro Systems Acquisition or
     the Pending Capstar Acquisition, including the repayment of loans made by
     ABRY III (including, in each case, fees and expenses incurred in connection
     therewith),

          (8)  Investments received in connection with an Asset Sale that
     complies with Section 4.09 of this Indenture,

          (9)  payments or distributions to dissenting stockholders pursuant to
     transactions permitted under the terms of this Indenture,

          (10) repurchases of Capital Stock deemed to occur upon the exercise of
     stock options if such Capital Stock represents a portion of the exercise
     price thereof,

          (11) payments to enable the Company to make payments to holders of its
     Capital Stock in lieu of issuance of fractional shares of its Capital
     Stock,

          (12) payments of principal and interest on the ABRY Subordinated Debt
     in accordance with the terms thereof,

          (13) any dividend or distribution made so long as concurrently
     therewith a capital contribution in an equal amount is made to the Company,
     and

 
                                      -76-

          (14) other Restricted Payments in an aggregate amount not to exceed $5
    million.

          In calculating the aggregate amount of Restricted Payments made
subsequent to the Issue Date for purposes of clause (3) of subsection (a) above,
amounts expended pursuant to clauses (1), (2) and (13) of the immediately
preceding paragraph shall be included in such calculation.

          (c)  Not later than the date of making any Restricted Payment, the
Issuers shall deliver to the Trustee an Officers' Certificate stating that such
Restricted Payment is permitted and setting forth the basis upon which the
calculations required by this Section 4.07 were computed, which calculations may
be based upon the Issuers' latest available financial statements, and (other
than with respect to any Restricted Payment permitted under clauses (5) and (6))
that no Default or Event of Default has occurred and is continuing and no
Default or Event of Default will occur immediately after giving effect to any
such Restricted Payments.

Section 4.08.  Limitation of Guarantees by Restricted Subsidiaries.
               ---------------------------------------------------

          (a)  The Company will not permit any of its Restricted Subsidiaries,
directly or indirectly, by way of the pledge of any intercompany note or
otherwise, to assume, guarantee or in any other manner become liable with
respect to any Indebtedness of the Company, unless, in any such case (i) such
Restricted Subsidiary executes and delivers a supplemental indenture to the
Indenture, providing a Guarantee of the Notes by such Restricted Subsidiary and
(ii) if any such assumption, guarantee or other liability of such Restricted
Subsidiary is provided in respect of Indebtedness that is expressly subordinated
to the Notes, the guarantee or other instrument provided by such Restricted
Subsidiary in respect of such subordinated Indebtedness shall be subordinated to
the Guarantee substantially to the same extent as such Indebtedness is
subordinated to the Notes.

 
                                      -77-

          (b)  Notwithstanding the foregoing, any such Guarantee by a Restricted
Subsidiary of the Notes shall provide by its terms that it shall be
automatically and unconditionally released and discharged, without any further
action required on the part of the Trustee or any Holder as provided in Section
10.06.

Section 4.09.  Limitation on Certain Asset Sales.
               --------------------------------- 

          (a)  The Company will not, and will not permit any of its Restricted
Subsidiaries to, consummate an Asset Sale unless

          (1)  the Company or such Restricted Subsidiary, as the case may be,
     receives consideration at the time of such sale or other disposition at
     least equal to the fair market value of the assets sold or otherwise
     disposed of (as determined in good faith by the Board of Directors of the
     Company, and evidenced by a Board Resolution);

          (2)  not less than 75% of the consideration received by the Company or
     such Restricted Subsidiary, as the case may be, is in the form of cash or
     Cash Equivalents and/or a controlling interest in a Person whose assets are
     useful to the Company, or any combination thereof, except to the extent to
     which the Company is undertaking a Permitted Asset Swap; provided that the
                                                              --------         
     amount of

               (a) any liabilities (as shown on the Company's or such Restricted
          Subsidiary's most recent balance sheet) of the Company or any of its
          Restricted Subsidiaries (other than contingent liabilities and
          liabilities that are by their terms subordinated to the Notes) that
          are assumed by the transferee of any such assets shall be deemed to be
          cash for purposes of this clause (2); and

               (b) any securities, notes or other obligations received by the
          Company or any such Restricted Subsidiary from such transferee that
          are promptly converted by the Company or such Restricted Subsidiary
          into cash (to the extent of the cash received), shall 

 
                                      -78-

          be deemed to be cash for purposes of this clause (2); and

          (3)  the Asset Sale Proceeds received by the Company or such
     Restricted Subsidiary are applied

               (a)  first, to the extent the Company or any such Restricted
          Subsidiary elects, or is required, to prepay, repay or purchase any
          Indebtedness of a Restricted Subsidiary, the prepayment, repayment or
          repurchase of such Indebtedness within 360 days following the receipt
          of the Asset Sale Proceeds from any Asset Sale; provided that in the
                                                          --------            
          case of the repayment of borrowings under any revolving credit
          facility, any such repayment shall result in a permanent reduction of
          the commitments thereunder in an amount equal to the principal amount
          so repaid;

               (b)  second, to the extent of the balance of Asset Sale Proceeds
          after application as described above, to the extent the Company
          elects, to an investment in assets (including Capital Stock or other
          securities purchased in connection with the acquisition of Capital
          Stock or Property of another Person) used or useful in businesses
          reasonably related, ancillary or complementary to the business of the
          Company or any such Restricted Subsidiary as conducted on the Issue
          Date; provided that such investment occurs within 360 days following
                --------                                                      
          receipt of such Asset Sale Proceeds; and

               (c)  third, if on such 360th day with respect to any Asset Sale,
          the Available Asset Sale Proceeds exceed $10 million, the Company
          shall apply an amount equal to the Available Asset Sale Proceeds to an
          offer to repurchase the Notes and all other pari passu Indebtedness of
                                                      ---- ------               
          the Company containing provisions substantially similar to those set
          forth in this Indenture regarding offers to purchase or redeem with
          Asset Sale Proceeds, in each case, at a purchase price in cash equal
          to 100% of the Accreted Value 

 
                                      -79-

          thereof plus accrued and unpaid interest, if any, to the purchase date
          (an "Excess Proceeds Offer").

          If an Excess Proceeds Offer is not fully subscribed, the Company may
retain the portion of the Available Asset Sale Proceeds not required to
repurchase Notes and such pari passu Indebtedness.
                          ---- -----              

          Pending the final application of any Asset Sale Proceeds, the Company
or such Restricted Subsidiary may temporarily reduce Indebtedness under a
revolving credit facility, if any, or otherwise invest such Asset Sale Proceeds
in Cash Equivalents.

          (b)   If the Company is required to make an Excess Proceeds Offer, the
Company shall within 45 days following the date specified in subparagraph
(a)(3)(c) above (i) cause a notice of the Excess Proceeds Offer to be sent at
least once to the Dow Jones News Service or similar business news service in the
United States and (ii) mail a notice of the Excess Proceeds Offer to the Trustee
and the Holders. Such notice shall be sent by first-class mail, postage prepaid,
to the Trustee and to each Noteholder, at the address appearing in the register
maintained by the Registrar of the Notes, and shall state:

          (i)   that the Excess Proceeds Offer is being made pursuant to this
     Section 4.09;

          (ii)  that such Holders have the right to require the Company to
     apply the Available Asset Sale Proceeds to repurchase such Notes at a
     purchase price in cash equal to 100% of the Accreted Value thereof plus
     accrued and unpaid interest, if any, to the purchase date which shall be no
     earlier than 45 days and not later than 60 days from the date such notice
     is mailed (the "Excess Proceeds Payment Date");

          (iii) that any Note not tendered or accepted for payment will
     continue to accrete Accreted Value or accrue interest, as the case may be;

 
                                      -80-

          (iv)   that any Notes accepted for payment pursuant to the Excess
     Proceeds Offer shall cease to accrete Accreted Value or accrue interest, as
     the case may be, accrete Accreted Value after the Excess Proceeds Payment
     Date;

          (v)    that Holders accepting the offer to have their Notes purchased
     pursuant to an Excess Proceeds Offer will be required to surrender the
     Notes, with the form entitled "Option of Holder to Elect Purchase" on the
     reverse of the Note completed, to the Paying Agent at the address specified
     in the notice prior to the close of business on the Business Day preceding
     the Excess Proceeds Payment Date;

          (vi)   that Holders will be entitled to withdraw their acceptance of
     the Excess Proceeds Offer if the Paying Agent receives, not later than the
     close of business on the third Business Day preceding the Excess Proceeds
     Payment Date, a facsimile transmission or letter setting forth the name of
     the Holder, the principal amount at maturity of the Notes delivered for
     purchase, and a statement that such Holder is withdrawing his election to
     have such Notes purchased;

          (vii)  that if the aggregate Accreted Value of Notes surrendered by
     Holders exceeds the amount of Excess Proceeds, Company shall select the
     Notes to be purchased on a pro rata basis (with such adjustments as may be
                                --------                                       
     deemed appropriate by the Company so that only Notes in denominations of
     $1,000 in principal amount at maturity or integral multiples thereof, shall
     be purchased);

          (viii) that Holders whose Notes are being purchased only in part
     will be issued new Notes equal in principal amount at maturity to the
     unpurchased portion of the Notes surrendered; provided that each Note
                                                   --------               
     purchased and each such new Note issued shall be in an original principal
     amount at maturity in denominations of $1,000 and integral multiples
     thereof;

 
                                      -81-

        (ix)   the calculations used in determining the amount of Available
     Asset Sale Proceeds to be applied to the purchase of such Notes;

        (x)    any other procedures that a Holder must follow to accept an
     Excess Proceeds Offer or effect withdrawal of such acceptance; and

        (xi)   the name and address of the Paying Agent.

          On the Excess Proceeds Payment Date, the Issuers shall, to the extent
lawful, (i) accept for payment, on a pro rata basis to the extent necessary,
                                     --------                               
Notes or portions thereof validly tendered pursuant to the Excess Proceeds
Offer, (ii) deposit with the Paying Agent money sufficient to pay the purchase
price plus accrued and unpaid interest, if any, on the Notes to be purchased or
portions thereof, (iii) deliver or cause to be delivered to the Trustee Notes so
accepted together with an Officers' Certificate stating that such Notes or
portions thereof were accepted for payment by the Issuers in accordance with the
terms of this Section 4.09.  The Paying Agent shall promptly mail to each Holder
so accepted payment in an amount equal to the purchase price for such Notes, and
the Issuers shall execute and issue, and the Trustee shall promptly authenticate
and make available for delivery to such Holder, a new Note equal in principal
amount at maturity to any unpurchased portion of the Notes surrendered; provided
                                                                        --------
that each such new Note shall be issued in an original principal amount at
maturity in denominations of $1,000 and integral multiples thereof.  The Issuers
will publicly announce the results of the Excess Proceeds Offer on the Excess
Proceeds Payment Date.

          (c)  In the event of the transfer of substantially all of the Property
and assets of the Company and its Restricted Subsidiaries as an entirety to a
Person in a transaction permitted under Section 5.01 of this Indenture below but
which transaction does not constitute a Change of Control, the successor Person
shall be deemed to have sold the properties and assets of the Issuers and their
Restricted Subsidiaries not so transferred for purposes of this covenant, and
shall comply 

 
                                      -82-

with the provisions of this Section 4.09 with respect to such deemed sale as if
it were an Asset Sale.

          (d)  The Company will comply with the requirements of Rule 14e-1 under
the Exchange Act and other securities laws and regulations thereunder to the
extent such laws and regulations are applicable in connection with the
repurchase of Notes pursuant to an Excess Proceeds Offer. To the extent that the
provisions of any securities laws or regulations conflict with this Section
4.09, the Company shall comply with the applicable securities laws and
regulations and shall not be deemed to have breached its obligations under this
Section 4.09 by virtue thereof.

Section 4.10.  Limitation on Transactions with Affiliates.
               ------------------------------------------ 

          (a)  The Company will not, and will not permit any of its Restricted
Subsidiaries to, directly or indirectly, enter into or suffer to exist any
transaction or series of related transactions (including, without limitation,
the sale, purchase, exchange or lease of assets, Property or services) with any
Affiliate (each an "Affiliate Transaction") or extend, renew, waive or otherwise
modify the terms of any Affiliate Transaction entered into prior to the Issue
Date unless

          (1)  such Affiliate Transaction is between or among the Company and
     its Restricted Subsidiaries; or

          (2)  the terms of such Affiliate Transaction are at least as favorable
     as the terms which could be obtained by the Company or such Restricted
     Subsidiary, as the case may be, in a comparable transaction made on an
     arm's-length basis between unaffiliated parties.

          In any Affiliate Transaction (or any series of related Affiliate
Transactions which are similar or part of a common plan) involving an amount or
having a fair market value in excess of $2.5 million which is not permitted
under clause (1) above, the Company must obtain a Board Resolution of the
Company certifying that such Affiliate Transaction complies with clause (2)
above. In any Affiliate Transaction (or any se-

 
                                      -83-

ries of related Affiliate Transactions which are similar or part of a common
plan) involving an amount or having a fair market value in excess of $10 million
which is not permitted under clause (1) above, the Company must obtain a
favorable written opinion as to the fairness of such transaction or
transactions, as the case may be, from an Independent Financial Advisor.

          (b)  The foregoing provisions will not apply to

          (1)  any Restricted Payment that is not prohibited by the provisions
     described under Section 4.07 of this Indenture,

          (2)  reasonable fees and compensation paid to, and indemnity provided
     on behalf of, officers, Directors, employees or consultants of the Company
     or any Restricted Subsidiary of the Company as determined in good faith by
     the Company's Board of Directors or senior management,

          (3)  any agreement as in effect as of the Issue Date or any amendment
     thereto or any transaction contemplated thereby (including pursuant to any
     amendment thereto) in any replacement agreement thereto so long as any such
     amendment or replacement agreement is not more disadvantageous to the
     Holders in any material respect than the original agreement as in effect on
     the Issue Date,

          (4)  transactions effected as part of a Qualified Securitization
     Transaction,

          (5)  any employment agreement entered into by the Company or any of 
     its Restricted Subsidiaries in the ordinary course of business, and
     advances to employees for moving, entertainment and travel expenses,
     drawing accounts and similar expenditures in the ordinary course of
     business,

          (6)  the existence of, or the performance by the Company or any of its
     Restricted Subsidiaries of its obligations under the terms of, any
     securityholders agreement (including any registration rights agreement or
     purchase 

 
                                      -84-

     agreement related thereto) to which it is a party as of the Issue Date and
     any similar agreements which it may enter into thereafter; provided,
                                                                --------
     however, that the existence of, or the performance by the Company or any of
     -------
     its Restricted Subsidiaries of obligations under, any future amendment to
     any such existing agreement or under any similar agreement entered into
     after the Issue Date shall only be permitted by this clause (6) to the
     extent that the terms of any such amendment or new agreement are not
     otherwise disadvantageous to the Holders in any material respect,

          (7)  transactions permitted by, and complying with, the provisions
     described under Article 5 of this Indenture below,

          (8)  payments of principal and interest on the ABRY Subordinated Debt
     in accordance with the terms thereof,

          (9)  transactions with customers, clients, suppliers, joint venture
     partners or purchasers or sellers of goods or services, in each case in the
     ordinary course of business (including, without limitation, pursuant to
     joint venture agreements) and otherwise in compliance with the terms of
     this Indenture which are fair to the Company or its Restricted
     Subsidiaries, in the reasonable determination of the Board of Directors of
     the Company or the senior management thereof, or are on terms at least as
     favorable as might reasonably have been obtained at such time from an
     unaffiliated party,

          (10) all transactions associated with the Merger Transactions and the
     Pending Capstar Acquisition, including the repayment of loans made by ABRY
     III,

          (11) transactions pursuant to the ABRY Management Agreement or
     pursuant to the terms of any amendment thereto or restatement thereof which
     terms are not more disadvantageous to the Holders in any material respect
     than the terms of such agreement as in effect on the Issue 

 
                                      -85-

     Date as determined in good faith by the Board of Directors of the Company
     and evidenced by a Board Resolution, and

          (12) with regard to the requirement to obtain the opinion of an
     Independent Financial Advisor only, the issuance of Capital Stock of the
     Company or Muzak LLC; provided that such issuance has been approved by the
                           --------                                            
     Board of Directors of the Company or Muzak LLC and the Board Resolution
     described in the immediately preceding paragraph has been delivered to the
     Trustee.

Section 4.11.  Limitations on Liens.
               -------------------- 

          The Company will not, and will not permit any of its Restricted
Subsidiaries to, create, incur or otherwise cause or suffer to exist or become
effective any Liens of any kind (other than Permitted Liens) upon any Property
or asset of the Company or any of its Restricted Subsidiaries or any shares of
Capital Stock or Indebtedness of any Restricted Subsidiary of the Company which
owns Property or assets, now owned or hereafter acquired, unless

          (1)  if such Lien secures Indebtedness which is subordinated to the
     Notes, any such Lien shall be subordinated to any Lien granted to the
     Holders to the same extent as such Indebtedness is subordinated to the
     Notes and

          (2)  in all other cases, the Notes are equally and ratably secured.

Section 4.12.  Limitations on Investments.
               -------------------------- 

          The Company will not, and will not permit any of its Restricted
Subsidiaries to, make any Investment other than

          (1)  a Permitted Investment or

          (2)  an Investment that is made after the Issue Date as a Restricted
     Payment in compliance with Section 4.07.

 
                                      -86-

Section 4.13.  Limitation on Sale and Lease-Back Transactions.
               ----------------------------------------------

          The Company will not, and will not permit any of its Restricted
Subsidiaries to, enter into any Sale and Lease-Back Transaction unless

          (1)  the consideration received in such Sale and Lease-Back
     Transaction is at least equal to the fair market value of the Property
     sold, as determined in good faith by the Board of Directors of the Company
     and evidenced by a Board Resolution,

          (2)  the Company could incur the Attributable Indebtedness in respect
     of such Sale and Lease-Back Transaction in compliance with Section 4.06 and

          (3)  the transfer of assets in such Sale and Lease-Back Transaction is
     permitted by, and the Company or such Restricted Subsidiary applies the
     proceeds of such transaction in compliance with Section 4.09.

Section 4.14.  Payments for Consent.
               -------------------- 

          The Company will not, and will not permit any of its Subsidiaries to,
directly or indirectly, pay or cause to be paid any consideration, whether by
way of interest, fee or otherwise, to any Holder for or as an inducement to any
consent, waiver or amendment of any of the terms or provisions of this Indenture
or the Notes unless such consideration is offered to be paid or agreed to be
paid to all Holders which so consent, waive or agree to amend in the time frame
set forth in solicitation documents relating to such consent, waiver or
agreement.

Section 4.15.  Corporate Existence.
               ------------------- 

          Subject to Article 5 hereof, each of the Issuers shall do or cause to
be done all things necessary to preserve and keep in full force and effect (i)
its corporate or limited liability company existence, and the corporate,
partnership or limited liability company or other existence of each Subsidi-

 
                                      -87-

ary, in accordance with the respective organizational documents (as the same may
be amended from time to time) of each Subsidiary and, within thirty days of the
Issue Date, the material rights (charter and statutory), licenses and franchises
of the Issuers and their Subsidiaries except where the failure to preserve and
keep in full force and effect any such rights, licenses and franchise shall not
have a material adverse effect on the financial condition, business, operations
or prospects of the Issuers and their Subsidiaries taken as a whole; and
provided that the Issuers shall not be required to preserve any such right,
- --------
license or franchise, or the corporate, limited liability company, partnership
or other existence of any of Subsidiaries, if the Board of Directors of the
applicable Issuer shall determine that the preservation thereof is no longer
desirable in the conduct of the business of the Issuers and their Subsidiaries,
taken as a whole, and that the loss thereof is not adverse in any material
respect to the Holders.

Section 4.16.  Change of Control.
               ----------------- 

          (a)  Upon the occurrence of a Change of Control, the Issuers shall be
obligated to make an offer to purchase (the "Change of Control Offer") each
Holder's outstanding Notes at a purchase price (the "Change of Control Purchase
Price") equal to 101% of the Accreted Value thereof plus accrued and unpaid
interest, if any, to the Change of Control Payment Date (as defined) in
accordance with the procedures set forth below.

          (b)  Within 20 days of the occurrence of a Change of Control, the
Issuers shall (i) cause a notice of the Change of Control Offer to be sent at
least once to the Dow Jones News Service or similar business news service in the
United States and (ii) send by first-class mail, postage prepaid, to the Trustee
and to each Noteholder, at the address appearing in the register maintained by
the Registrar of the Notes, a notice stating:

          (1)  that the Change of Control Offer is being made pursuant to this
     covenant and that all Notes tendered will be accepted for payment;

 
                                      -88-

          (2)  the Change of Control Purchase Price and the purchase date (which
     shall be a Business Day no earlier than 30 days nor later than 60 days from
     the date such notice is mailed (the "Change of Control Payment Date"));

          (3)  that any Note not tendered will continue to accrete Accreted
     Value or accrue interest, as the case may be;

          (4)  that, unless the Issuers default in the payment of the Change of
     Control Purchase Price, any Notes accepted for payment pursuant to the
     Change of Control Offer shall cease to accrete Accreted Value or accrue
     interest, as the case maybe, after the Change of Control Payment Date;

          (5)  that Holders accepting the offer to have their Notes purchased
     pursuant to a Change of Control Offer will be required to surrender the
     Notes to the Paying Agent at the address specified in the notice prior to
     the close of business on the Business Day preceding the Change of Control
     Payment Date;

          (6)  that Holders will be entitled to withdraw their acceptance if the
     Paying Agent receives, not later than the close of business on the third
     Business Day preceding the Change of Control Payment Date, a telegram,
     telex, facsimile transmission or letter setting forth the name of the
     Holder, the principal amount at maturity of the Notes delivered for
     purchase, and a statement that such Holder is withdrawing his election to
     have such Notes purchased;

          (7)  that Holders whose Notes are being purchased only in part will be
     issued new Notes equal in principal amount at maturity to the unpurchased
     portion of the Notes surrendered;

          (8)  any other procedures that a Holder must follow to accept a Change
     of Control Offer or effect withdrawal of such acceptance; and

 
                                      -89-

          (9)  the name and address of the Paying Agent.

          On the Change of Control Payment Date, the Issuers shall, to the
extent lawful,

          (1)  accept for payment Notes or portions thereof properly tendered
     pursuant to the Change of Control Offer,

          (2)  deposit with the Paying Agent money sufficient to pay the
     purchase price of all Notes or portions thereof so tendered, and

          (3)  deliver or cause to be delivered to the Trustee the Notes so
     accepted together with an Officers' Certificate stating the Notes or
     portions thereof tendered to the Issuers.

The Paying Agent shall promptly mail to each Holder so accepted payment in an
amount equal to the purchase price for such Notes, and the Issuers shall execute
and issue, and the Trustee shall promptly authenticate and mail to such Holder,
a new Note equal in principal amount at maturity to any unpurchased portion of
the Notes surrendered; provided that each such new Note shall be issued in an
                       --------                                              
original principal amount in denominations of $1,000 at maturity and integral
multiples thereof.

          (c)  If the Senior Credit Facility is in effect, or any amounts are
owing thereunder or in respect thereof, at the time of the occurrence of a
Change of Control, prior to the mailing of the notice to Holders described in
Section 4.16(b) above, but in any event within 60 days following any Change of
Control, the Issuers covenant to

          (1)  repay in full all obligations and terminate all commitments under
     or in respect of the Senior Credit Facility, the terms of which require
     repayment upon a Change of Control or offer to repay in full all
     obligations and terminate all commitments under or in respect of the Senior
     Credit Facility and repay the Indebtedness owed to each such lender who has
     accepted such offer, or

 
                                      -90-

          (2)  obtain the requisite consents under the Senior Credit Facility to
     permit the repurchase of the Notes as described above.

The Issuers must first comply with the covenant described in the preceding
sentence before they shall be required to purchase Notes in the event of a
Change of Control; provided that the Issuers' failure to comply with the
                   --------                                             
covenant described in the preceding sentence constitutes an Event of Default
described in clause (3) under Section 6.01 if not cured within 30 days after the
notice required by such clause.

          (d)  The Issuers will comply with the requirements of Rule 14e-1 under
the Exchange Act and any other securities laws and regulations thereunder to the
extent such laws and regulations are applicable in connection with the
repurchase of Notes pursuant to a Change of Control Offer. To the extent that
the provisions of any securities laws or regulations conflict with this Section
4.16, the Issuers shall comply with the applicable securities laws and
regulations and shall not be deemed to have breached their obligations under
this Section 4.16 by virtue thereof.

Section 4.17.  Maintenance of Office or Agency.
               ------------------------------- 

          The Issuers shall maintain an office or agency in the Borough of
Manhattan, The City of New York where Notes may be surrendered for registration
of transfer or exchange or for presentation for payment and where notices and
demands to or upon the Issuers in respect of the Notes and this Indenture may be
served. The Issuers shall give prompt written notice to the Trustee of the
location, and any change in the location, of such office or agency. If at any
time the Issuers shall fail to maintain any such required office or agency or
shall fail to furnish the Trustee with the address thereof, such presentations,
surrenders, notices and demands may be made or served at the address of the
Trustee as set forth in Section 12.02.

          The Issuers may also from time to time designate one or more other
offices or agencies where the Notes may be presented or surrendered for any or
all such purposes and may from 

 
                                      -91-


time to time rescind such designations. The Issuers shall give prompt written
notice to the Trustee of such designation or rescission and of any change in the
location of any such other office or agency.

          The Issuers hereby initially designate the offices of State Street
Bank and Trust Company, N.A. at 61 Broadway, New York, New York 10006 as such
office of the Issuers.

Section 4.18.  Limitation on Dividend and Other 
               Payment Restrictions Affecting
               Restricted Subsidiaries.
               ------------------------

          The Company will not, and will not permit any of its Restricted
Subsidiaries to, directly or indirectly, create or otherwise cause or suffer to
exist or become effective any encumbrance or restriction on the ability of any
Restricted Subsidiary of the Company to

          (1)  (a) pay dividends or make any other distributions to the Company
     or any Restricted Subsidiary of the Company

               (i)  on its Capital Stock or

               (ii) with respect to any other interest or participation in,
          or measured by, its profits or

          (b)  repay any Indebtedness or any other obligation owed to the
     Company or any Restricted Subsidiary of the Company,

          (2)  make loans or advances or capital contributions to the Company or
     any of its Restricted Subsidiaries or

          (3)  transfer any of its properties or assets to the Company or any of
     its Restricted Subsidiaries,

except for such encumbrances or restrictions existing under or by reason of

 
                                      -92-

          (1)  encumbrances or restrictions existing on the Issue Date to the
     extent and in the manner such encumbrances and restrictions are in effect
     on the Issue Date,

          (2)  (a) this Indenture and the Notes, (b) the Senior Subordinated
     Note Indenture, the Senior Subordinated Notes and the Senior Subordinated
     Guarantees, and (c) the Senior Credit Facility

          (3)  applicable law or applicable rules, regulations or orders,

          (4)  any instrument governing Acquired Indebtedness, which encumbrance
     or restriction is not applicable to any Person, or the Properties or assets
     of any Person, other than the Person, or the Property or assets of the
     Person (including any Subsidiary of the Person), so acquired,

          (5)  customary non-assignment provisions in leases or other agreements
     entered in the ordinary course of business,

          (6)  Refinancing Indebtedness; provided that such restrictions are not
                                         --------                               
     materially more restrictive, when taken as a whole, than those contained in
     the agreements governing the Indebtedness being extended, refinanced,
     renewed, replaced, defeased or refunded,

          (7)  customary restrictions in security agreements or mortgages
     securing Indebtedness of the Issuers or a Restricted Subsidiary to the
     extent such restrictions restrict the transfer of the Property subject to
     such security agreements and mortgages,

          (8)  customary restrictions pursuant to an agreement that has been
     entered into for the sale or disposition of Capital Stock or assets
     permitted under this Indenture,

          (9)  restrictions on the transfer of assets subject to any Lien
     permitted under this Indenture imposed by the holder of such Lien,

 
                                      -93-

          (10)  any agreement or instrument governing Capital Stock of any
     Person that is acquired; provided that no such restriction is created in
                              --------                                       
     contemplation of the acquisition of such Capital Stock,

          (11)  Indebtedness or other contractual requirements of a
     Securitization Entity in connection with a Qualified Securitization
     Transaction; provided that such restrictions apply only to such
                  --------                                          
     Securitization Entity,

          (12)  Purchase Money Indebtedness incurred to acquire Property in the
     ordinary course of business which Indebtedness imposes restrictions
     regarding transfer of the Property acquired,

          (13)  the terms of any Indebtedness permitted by this Indenture to be
     incurred by any Restricted Subsidiary which encumbrances or restrictions
     are no more restrictive than those contained in the Senior Subordinated
     Note Indenture as in effect on the Issue Date,

          (14)  any agreement or instrument governing Indebtedness (whether or
     not outstanding) of Foreign Restricted Subsidiaries of the Company incurred
     in reliance on clauses (8) and (16) of the definition of Permitted
     Indebtedness, or

          (15)  restrictions on cash or other deposits or net worth imposed by
     customers under contracts entered into in the ordinary course of business.

Section 4.19.  Limitation on Conduct of Business.
               --------------------------------- 

          The Company and its Restricted Subsidiaries will not engage in any
businesses which are not reasonably similar, ancillary, complementary or related
to the businesses in which the Company and its Restricted Subsidiaries are
engaged in on the Issue Date except to such extent as would not be material to
the Company and its Restricted Subsidiaries, taken as a whole.

 
                                      -94-

Section 4.20.  Compliance with Laws.
               -------------------- 

          The Issuers shall comply, and shall cause each of their respective
Subsidiaries to comply, with all applicable statutes, rules, regulations, orders
and restrictions of the United States of America, all states and municipalities
thereof, and of any governmental department, commission, board, regulatory
authority, bureau, agency and instrumentality of the foregoing, in respect of
the conduct of their respective businesses and the ownership of their respective
properties, except for such noncompliances as would not in the aggregate have a
material adverse effect on the financial condition or results of operations of
the Issuers and their Subsidiaries taken as a whole.

Section 4.21.  Limitation on Preferred Stock of Restricted Subsidiaries.
               --------------------------------------------------------

          The Company will not permit any of its Restricted Subsidiaries to
issue any Preferred Stock (except Preferred Stock issued to the Company or a
Restricted Subsidiary of the Company) or permit any Person (other than the
Company or a Restricted Subsidiary of the Company) to hold any such Preferred
Stock unless such Restricted Subsidiary would be entitled to incur or assume
Indebtedness under Section 4.06 (other than Permitted Indebtedness) in the
aggregate principal amount equal to the aggregate liquidation value of the
Preferred Stock to be issued.

Section 4.22.  [Intentionally Omitted].
               ----------------------- 

Section 4.23.  Maintenance of Properties and Insurance.
               --------------------------------------- 

          (a) Each Issuer shall cause all material properties owned by or leased
by it or any of its Subsidiaries used or useful to the conduct of such Issuer's
business or the business of any of its Subsidiaries to be maintained and kept in
normal condition, repair and working order and supplied with all necessary
equipment and shall cause to be made all necessary repairs, renewals,
replacements, betterments and improvements thereof, all as in its judgment may
be necessary, so that the 

 
                                      -95-

business carried on in connection therewith may be properly and advantageously
conducted at all times; provided, however, that nothing in this Section 4.23
                        --------  -------
shall prevent an Issuer or any of its Subsidiaries from discontinuing the use,
operation or maintenance of any of such properties, or disposing of any of them,
if such discontinuance or disposal is, in the judgment of the Board of Directors
of such Issuer or of the Board of Directors of any Subsidiary of such Issuer
concerned, or of an officer (or other agent employed by such Issuer or of any of
its Subsidiaries) of such Issuer or any of its Subsidiaries having managerial
responsibility for any such property, desirable in the conduct of the business
of such Issuer or any Subsidiary of such Issuer, and if such discontinuance or
disposal is not adverse in any material respect to the Holders.

          (b) The Issuers shall maintain, and shall cause their respective
Subsidiaries to maintain, insurance with responsible carriers against such risks
and in such amounts, and with such deductibles, retentions, self-insured amounts
and co-insurance provisions, as are customarily carried by similar businesses of
similar size, including property and casualty loss, workers' compensation and
interruption of business insurance.  The Issuers shall provide, and shall cause
their respective Subsidiaries to provide, an Officers' Certificate as to
compliance with the foregoing requirements to the Trustee prior to the
anniversary or renewal date of each such policy, together with satisfactory
evidence of such insurance, which certificate shall expressly state such
expiration date for each policy listed.


                                   ARTICLE 5

                             SUCCESSOR CORPORATION

Section 5.01.  Limitation on Consolidation Merger and Sale of Assets.
               -----------------------------------------------------

          The Company will not consolidate with, merge with or into, or sell,
assign, transfer, lease, convey or otherwise 

 
                                      -96-

dispose of all or substantially all of the assets of the Company (as an entirety
or substantially as an entirety in one transaction or a series of related
transactions), to any Person unless:

          (1)  the Company shall be the continuing Person, or the Person (if
     other than the Company) formed by such consolidation or into which the
     Company is merged or to which the Properties and assets of the Company are
     sold, assigned, transferred, leased, conveyed or otherwise disposed of
     shall be a corporation, partnership, trust or a limited liability company
     organized and existing under the laws of the United States or any State
     thereof or the District of Columbia and shall expressly assume, by a
     supplemental indenture, executed and delivered to the Trustee, in form
     satisfactory to the Trustee, all of the obligations of the Company under
     this Indenture and the Notes, and the obligations thereunder shall remain
     in full force and effect; provided that if at any time the Company or such
                               --------                                        
     successor Person is a limited liability company, partnership or trust there
     shall be a co-issuer of the Notes that is a Restricted Subsidiary of the
     Company and that is a corporation organized and existing under the laws of
     the United States or any State thereof or the District of Columbia;

          (2)  immediately before and immediately after giving effect to such
     transaction, no Default or Event of Default shall have occurred and be
     continuing; and

          (3)  immediately after giving effect to such transaction on a pro
                                                                        ---
     forma basis the Company or such Person could incur at least $1.00 of
     -----                                                               
     additional Indebtedness (other than Permitted Indebtedness) under Section
     4.06.

          In connection with any consolidation, merger or transfer of assets
contemplated by this Section 5.01, the Company shall deliver, or cause to be
delivered, to the Trustee, in form and substance reasonably satisfactory to the
Trustee, an Officers' Certificate and an Opinion of Counsel, each stating that
such consolidation, merger or transfer and the supple- 

 
                                      -97-

mental indenture in respect thereto comply with this provision and that all
conditions precedent herein provided for relating to such transaction or
transactions have been complied with.

          For purposes of the foregoing, the transfer (by lease, assignment,
sale or otherwise, in a single transaction or series of transactions) of all or
substantially all of the properties or assets of one or more Restricted
Subsidiaries of the Company the Capital Stock of which constitutes all or
substantially all of the properties and assets of the Company, shall be deemed
to be the transfer of all or substantially all of the properties and assets of
the Company.

          Notwithstanding the foregoing, the Company may merge or consolidate
with or transfer substantially all of its assets to an Affiliate that has no
significant assets or liabilities and was formed solely for the purpose of
changing the jurisdiction of organization of the Company or the form of
organization of the Company so long as the amount of Indebtedness of the Company
and its Restricted Subsidiaries is not increased thereby and that the successor
assumes all obligations of the Company under this Indenture, the Notes and the
Registration Rights Agreement.  Nothing in this Section 5.01 shall be deemed to
prevent the consummation of the Merger Transactions.

Section 5.02.  Successor Person Substituted.
               ---------------------------- 

          Upon any consolidation, merger, conveyance or any transfer of all or
substantially all of the assets of the Company in accordance with Section 5.01
above, the successor entity formed by such consolidation or into which the
Company is merged or to which such transfer is made shall succeed to, and be
substituted for, and may exercise every right and power of, the Company under
this Indenture with the same effect as if such successor entity had been named
as the Company herein, and thereafter the predecessor entity shall be relieved
of all obligations and covenants under this Indenture and the Notes.

 
                                      -98-

                                   ARTICLE 6

                             DEFAULTS AND REMEDIES

Section 6.01.  Events of Default.
               ----------------- 

          An "Event of Default" occurs if

          (a) there is a default in the payment of any principal of, or premium,
     if any, on the Notes when the same becomes due and payable at maturity,
     upon acceleration, redemption or otherwise;

          (b) there is a default in the payment of any interest on any Note when
     the same becomes due and payable and the default continues for a period of
     30 calendar days;

          (c) there is a default by any Issuer or any Restricted Subsidiary in
     the observance or performance of any other covenant in the Notes or this
     Indenture for 30 calendar days after written notice from the Trustee or the
     holders of not less than 25% in aggregate principal amount at maturity of
     the Notes then outstanding (except in the case of a default with respect to
     Sections 4.16 or 5.01 which shall constitute an Event of Default with such
     notice requirement but without such passage of time requirement);

          (d) there is a failure to pay at final maturity (after giving effect
     to any applicable grace period) any Indebtedness of the Company or any
     Restricted Subsidiary thereof (other than a Securitization Entity), or the
     acceleration of any such Indebtedness, which acceleration shall not be
     rescinded or annulled within 20 days after written notice to the Company by
     the Trustee or any Holder, if the aggregate amount of such Indebtedness,
     together with the amount of any other such Indebtedness in default for
     failure to pay or which has been accelerated, aggregates $5 million or more
     at any time;

 
                                      -99-

          (e) any final judgment or judgments which can no longer be appealed
     for the payment of money in excess of $5 million (excluding amounts covered
     by insurance for which coverage is not being challenged or denied unless
     the Company is contesting such challenge or denial in good faith) shall be
     rendered against the Company or any Restricted Subsidiary thereof, and
     shall not be discharged for any period of 60 consecutive calendar days
     during which a stay of enforcement shall not be in effect;

          (f) any Issuer or any Significant Subsidiary pursuant to or within the
     meaning of any Bankruptcy Law:

              (A)  commences a voluntary case,

              (B)  consents to the entry of an order for relief against it in an
          involuntary case,

              (C)  consents to the appointment of a Custodian of it or for all
          or substantially all of its Property, or

              (D)  makes a general assignment for the benefit of its creditors,
          or

              (E)  generally is not able to pay its debts as they become due;

          (g) a court of competent jurisdiction enters an order or decree under
     any Bankruptcy Law that:

              (A)  is for relief against any Issuer or any Significant
          Subsidiary in an involuntary case,

              (B)  appoints a Custodian of any Issuer or any Significant
          Subsidiary or for all or substantially all of the Property of any
          Issuer or any Significant Subsidiary, or

              (C)  orders the liquidation of any Issuer or any Significant
          Subsidiary,

 
                                     -100-

     and the order or decree remains unstayed and in effect for 60 days; and

          (h) any Guarantee, if any, of a Significant Subsidiary ceases to be in
     full force and effect or any Guarantee, if any, of a Significant Subsidiary
     is declared to be null and void and unenforceable or any Guarantee, if any,
     of a Significant Subsidiary is found to be invalid or any of the
     Guarantors, if any, denies its liability under its Guarantee, if any,
     (other than by reason of release of a Guarantor in accordance with the
     terms of this Indenture).

          The term "Bankruptcy Law" means Title 11, U.S. Code or any similar
Federal or state law for the relief of debtors.  The term "Custodian" means any
receiver, trustee, assignee, liquidator or similar official under any Bankruptcy
Law.

          The Trustee may withhold notice to the Holders of any Default (except
in payment of principal or premium, if any, or interest on the Notes) if the
Trustee considers it to be in the best interest of the Holders to do so.

Section 6.02.  Acceleration.
               ------------ 

          If an Event of Default (other than an Event of Default of the type
described in Section 6.01(f) or (g)) shall have occurred and be continuing, then
the Trustee or the holders of not less than 25% in aggregate principal amount at
maturity of the Notes then outstanding may declare to be immediately due and
payable the entire Accreted Value of all the Notes then outstanding plus accrued
but unpaid interest, if any, to the date of acceleration and (1) the same shall
become immediately due and payable or (2) if there are any amounts outstanding
under the Senior Credit Facility, shall become immediately due and payable upon
the first to occur of an acceleration under the Senior Credit Facility or five
Business Days after receipt by the Issuers and the representative under the
Senior Credit Facility of a notice of acceleration; provided, however, that
                                                    --------  -------      
after such acceleration but before a judgment or decree based on acceleration is
obtained by the Trustee, the holders of a majority in aggregate principal amount
at maturity 

 
                                     -101-

of outstanding Notes may, under certain circumstances, rescind and
annul such acceleration if

          (1)  all Events of Default, other than nonpayment of Accreted Value,
     premium, if any, or interest that has become due solely because of the
     acceleration, have been cured or waived as provided in this Indenture,

          (2)  to the extent the payment of such interest is lawful, interest on
     overdue installments of interest and overdue Accreted Value, which has
     become due otherwise than by such declaration of acceleration, has been
     paid,

          (3)  the Issuers have paid the Trustee its reasonable compensation and
     reimbursed the Trustee for its expenses, disbursements and advances and

          (4)  in the event of the cure or waiver of an Event of Default of the
     type described in Section 6.01(f) or (g) above, the Trustee shall have
     received an Officers' Certificate and an Opinion of Counsel that such Event
     of Default has been cured or waived.

No such rescission shall affect any subsequent Default or impair any right
consequent thereto. In case an Event of Default of the type described in Section
6.01(f) or (g) above shall occur, the Accreted Value, premium and interest, if
any, amount with respect to all of the Notes shall be due and payable
immediately without any declaration or other act on the part of the Trustee or
the Noteholders.

Section 6.03.  Other Remedies.
               -------------- 

          If an Event of Default occurs and is continuing, the Trustee may
pursue any available remedy by proceeding at law or in equity to collect the
payment of Accreted Value of, or premium, if any, and interest on the Notes or
to enforce the performance of any provision of the Notes, the obligations set
forth in the Guarantees, if any, or this Indenture and may take any necessary
action requested of it as Trustee to settle, com-

 
                                     -102-

promise, adjust or otherwise conclude any proceedings to which it is a party.

          The Trustee may maintain a proceeding even if it does not possess any
of the Notes or does not produce any of them in the proceeding.  A delay or
omission by the Trustee or any Noteholder in exercising any right or remedy
accruing upon an Event of Default shall not impair the right or remedy or
constitute a waiver of or acquiescence in the Event of Default.  No remedy is
exclusive of any other remedy.  All available remedies are cumulative to the
extent permitted by law.

Section 6.04.  Waiver of Past Defaults and Events of Default.
               ---------------------------------------------

          Subject to Sections 6.02, 6.07 and 8.02 hereof, the Holders of a
majority in principal amount at maturity of the Notes then outstanding shall
have the right to waive past Defaults under this Indenture except a Default in
                                                           ------             
the payment of the Accreted Value of, or interest or premium, if any, on any
Note, which cannot be waived without the consent of the Holder of such Notes or
in respect of a covenant or a provision which cannot be modified or amended
without the consent of all Holders.  Upon any such waiver, such Default shall
cease to exist, and any Event of Default arising therefrom shall be deemed to
have been cured for every purpose of this Indenture; but no such waiver shall
extend to any subsequent or other Default or Event of Default or impair any
right consequent thereto.

Section 6.05.  Control by Majority.
               ------------------- 

          The Holders of a majority in principal amount at maturity of the
outstanding Notes have the right to direct the time, method and place of
conducting any proceeding for any remedy available to the Trustee or exercising
any trust or power conferred on the Trustee by this Indenture.  The Trustee,
however, may refuse to follow any direction that conflicts with law or this
Indenture or that the Trustee determines may be unduly prejudicial to the rights
of another Noteholder not taking part in such direction, and the Trustee shall
have the right to decline to follow any such direction if the Trustee, being
ad-

 
                                     -103-

vised by counsel, determines that the action so directed may not lawfully be
taken or if the Trustee in good faith shall, by a Trust Officer, determine that
the proceedings so directed may involve it in personal liability; provided that
                                                                  --------
the Trustee may take any other action deemed proper by the Trustee which is not
inconsistent with such direction.

Section 6.06.  Limitation on Suits.
               ------------------- 

          Subject to Section 6.07 below, no Holder has any right to institute
any proceeding with respect to this Indenture or any remedy thereunder unless:

          (1)  the Holders of at least 25% in aggregate principal amount at
     maturity of the outstanding Notes make a written request to the Trustee to
     pursue the remedy;

          (2)  such Holder or Holders offer to the Trustee indemnity reasonably
     satisfactory to the Trustee against any loss, liability or expense which
     may be incurred in compliance with such request;

          (3)  the Trustee fails to institute such proceeding within 60 calendar
     days after receipt of such notice and the offer of indemnity; and

          (4)  the Trustee has not received directions inconsistent with such
     written request during such 60-day period by the Holders of a majority in
     aggregate principal amount at maturity of the outstanding Notes.

          A Noteholder may not use this Indenture to prejudice the rights of
another Noteholder or to obtain a preference or priority over another
Noteholder.

Section 6.07.  Rights of Holders to Receive Payment.
               ------------------------------------ 

          Notwithstanding any other provision of this Indenture, the right of
any Holder to receive payment of Accreted Value or principal of, or premium, if
any, or accrued interest of any Note held by such Holder on or after the
respective due dates expressed in such Note, or to bring suit for the
enforce-

 
                                     -104-

ment of any such payment on or after such respective dates, is absolute and
unconditional and shall not be impaired or affected without the consent of the
Holder.

Section 6.08.  Collection Suit by Trustee.
               -------------------------- 

          If an Event of Default in payment of Accreted Value, premium or
interest specified in Section 6.01(a), (b) or (c) hereof occurs and is
continuing, the Trustee may recover judgment in its own name and as trustee of
an express trust against any or all of the Issuers and the Guarantors, if any,
for the whole amount of unpaid Accreted Value and accrued interest, if any,
remaining unpaid, together with interest on overdue principal and, to the extent
that payment of such interest is lawful, interest on overdue installments of
interest, in each case at the rate then borne by the Notes, and such further
amounts as shall be sufficient to cover the costs and expenses of collection,
including the reasonable compensation, expenses, disbursements and advances of
the Trustee, its agents and counsel.

Section 6.09.  Trustee May File Proofs of Claim.
               -------------------------------- 

          The Trustee may file such proofs of claim and other papers or
documents as may be necessary or advisable in order to have the claims of the
Trustee (including any claim for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel) and the
Noteholders allowed in any judicial proceedings relative to the Issuers (or any
other obligor upon the Notes), its creditors or its Property and shall be
entitled and empowered to collect and receive any monies or other Property
payable or deliverable on any such claims and to distribute the same after
deduction of its charges and expenses to the extent that any such charges and
expenses are not paid out of the estate in any such proceedings and any
custodian in any such judicial proceeding is hereby authorized by each
Noteholder to make such payments to the Trustee, and in the event that the
Trustee shall consent to the making of such payments directly to the
Noteholders, to pay to the Trustee any amount due to it for the reasonable
compensation, expenses, disbursements and advances of the Trustee, 

 
                                     -105-

its agents and counsel, and any other amounts due the Trustee under Section 7.07
hereof.

          Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Noteholder any plan
or reorganization, arrangement, adjustment or composition affecting the Notes or
the rights of any Holder thereof, or to authorize the Trustee to vote in respect
of the claim of any Noteholder in any such proceedings.

Section 6.10.  Priorities.
               ---------- 

          If the Trustee collects any money pursuant to this Article 6, it shall
pay out the money in the following order:

          FIRST:  to the Trustee for amounts due under Section 7.07 hereof;

          SECOND:  to Noteholders for amounts due and unpaid on the Notes for
     Accreted Value, premium, if any, and interest, if any, as to each, ratably,
     without preference or priority of any kind, according to the amounts due
     and payable on the Notes; and

          THIRD:  to the Issuers or, to the extent the Trustee collects any
     amounts from any Guarantor, if any, to such Guarantor.

          The Trustee may fix a record date and payment date for any payment to
Noteholders pursuant to this Section 6.10.

Section 6.11.  Undertaking for Costs.
               --------------------- 

          In any suit for the enforcement of any right or remedy under this
Indenture or in any suit against the Trustee for any action taken or omitted by
it as Trustee, a court in its discretion may require the filing by any party
litigant in the suit of an undertaking to pay the costs of the suit, and the
court in its discretion may assess reasonable costs, including reasonable
attorneys' fees, against any party litigant in the suit, having due regard to
the merits and good faith of the 

 
                                     -106-

claims or defenses made by the party litigant. This Section 6.11 does not apply
to a suit by the Trustee, a suit by a Holder pursuant to Section 6.07 hereof or
a suit by Holders of more than 10% in principal amount at maturity of the Notes
then outstanding.

                                   ARTICLE 7


                                    TRUSTEE

Section 7.01.  Duties of Trustee.
               ----------------- 

          (a) If an Event of Default known to the Trustee has occurred and is
continuing, the Trustee shall exercise such rights and powers vested in it by
this Indenture and use the same degree of care and skill in its exercise as a
prudent person would exercise or use under the circumstances in the conduct of
such person's own affairs.

          (b) Except during the continuance of an Event of Default known to the
Trustee:

               (1) The Trustee need perform only those duties that are
     specifically set forth in this Indenture and no others.

               (2) In the absence of bad faith on its part, the Trustee may
     conclusively rely, as to the truth of the statements and the correctness of
     the opinions expressed therein, upon certificates or opinions furnished to
     the Trustee and conforming to the requirements of this Indenture but, in
     the case of any such certificates or opinions which by any provision hereof
     are specifically required to be furnished to the Trustee, the Trustee shall
     be under a duty to examine the same to determine whether or not they
     conform to the requirements of this Indenture.

          (c) The Trustee may not be relieved from liability for its own
negligent action, its own negligent failure to act, or its own willful
misconduct, except that:

 
                                     -107-

               (1) This paragraph does not limit the effect of paragraph (b) of
     this Section 7.01.

               (2) The Trustee shall not be liable for any error of judgment
     made in good faith by a Trust Officer, unless it is proved that the Trustee
     was negligent in ascertaining the pertinent facts.

               (3) The Trustee shall not be liable with respect to any action it
     takes or omits to take in good faith in accordance with a direction
     received by it pursuant to Sections 6.02, 6.04 and 6.05 hereof.

               (4) No provision of this Indenture shall require the Trustee to
     expend or risk its own funds or otherwise incur any financial liability in
     the performance of any of its rights or powers if it determines in the
     exercise of its reasonable discretion that repayment of such funds or
     adequate indemnity satisfactory to it against such risk or liability is not
     reasonably assured to it.

               (d) The Trustee is not under any obligation to exercise any of
its rights or powers at the request or direction of any of the Holders unless
such Holders shall have offered to the Trustee indemnity or security
satisfactory to it in its reasonable discretion against any loss, liability,
expense or fee.

               (e) The Trustee shall not be liable for interest on any money
received by it except as the Trustee may agree in writing with the Issuers.
Money held in trust by the Trustee need not be segregated from other funds
except to the extent required by the law.

               (f) The Trustee shall not be deemed to have knowledge of any
Default or fact or event which might require the Trustee to take any action or
give any notice unless one of its Trust Officers has actual knowledge thereof.

               (g) The Trustee is also being appointed, and may serve
contemporaneously with its service hereunder, as Trustee 

 
                                     -108-

under the Senior Subordinated Note Indenture and shall not be considered to be
conflicted in its duties under either Indenture by reason of its acting as
trustee under the other. After an Event of Default under either the Senior
Subordinated Note Indenture or this Indenture, and in order that it might not be
conflicted in the performance of its duties under either Indenture, the Trustee
shall resign as trustee under one of the Indentures; provided, however, that
                                                     --------  -------
until the appointment of a successor Trustee, the Trustee shall not be
considered to have violated the standard set forth in Section 7.01(a) hereof by
continuing to act as Trustee under both the Senior Subordinated Note Indenture
and this Indenture if it separates the performance of its discretionary duties
under the Senior Subordinated Note Indenture and this Indenture within its
corporate trust department and retains separate counsel for itself as trustee
under each of the Indentures.

          (h) Whether or not therein expressly so provided, paragraphs (a),
(b), (c), (d), (e), (f) and (g) of this Section 7.01 shall govern every
provision of this Indenture that in any way relates to the Trustee.

Section 7.02.  Rights of Trustee.
               ----------------- 

          Subject to Section 7.01 hereof:

          (1)  The Trustee may rely on any document reasonably believed by it to
     be genuine and to have been signed or presented by the proper Person.  The
     Trustee need not investigate any fact or matter stated in the document.

          (2)  Before the Trustee acts or refrains from acting with respect to
     any matters contemplated by this Indenture or the Notes it may require an
     Officers' Certificate or an Opinion of Counsel, or both, which shall
     conform to the provisions of Section 12.05 hereof.  The Trustee shall be
     protected and shall not be liable for any action it takes or omits to take
     in good faith in reliance on such certificate or opinion.

 
                                     -109-

          (3)  The Trustee may act through Agents and shall not be responsible
     for the misconduct or negligence of any agent so long as the appointment of
     such agent was made with due care.

          (4)  The Trustee shall not be liable for any action it takes or omits
     to take in good faith which it reasonably believes to be authorized or
     within its rights or powers.

          (5)  The Trustee may consult with counsel of its selection, and the
     advice or opinion of such counsel as to matters of law shall be full and
     complete authorization and protection from liability in respect of any
     action taken, omitted or suffered by it hereunder in good faith and in
     accordance with the advice or opinion of such counsel.

Section 7.03.  Individual Rights of Trustee.
               ---------------------------- 

          The Trustee in its individual or any other capacity may become the
owner or pledgee of Notes and may make loans to, accept deposits from, perform
services for or otherwise deal with the Issuers, or any Affiliates thereof, with
the same rights it would have if it were not Trustee.  Any Agent may do the same
with like rights.  The Trustee, however, shall be subject to Sections 7.10 and
7.11 hereof.

Section 7.04.  Trustee's Disclaimer.
               -------------------- 

          The Trustee shall not be responsible for and makes no representation
as to the validity or adequacy of this Indenture or the Notes, it shall not be
accountable for the Issuers' use of the proceeds from the sale of Notes or any
money paid to the Issuers pursuant to the terms of this Indenture and it shall
not be responsible for any statement in the Notes other than its certificate of
authentication.

 
                                     -110-

Section 7.05.  Notice of Defaults.
               ------------------ 

          If a Default occurs and is continuing and if it is known to the
Trustee, the Trustee shall mail to each Noteholder notice of the Default within
30 days after it occurs.  Except in the case of a Default in payment of the
Accreted Value of, or premium, if any, or interest, if any, on any Note the
Trustee may withhold the notice if and so long as the board of directors of the
Trustee, the executive committee or any trust committee of such board and/or its
Trust Officers in good faith determine(s) that withholding the notice is in the
interests of the Noteholders.

Section 7.06.  Reports by Trustee to Holders.
               ----------------------------- 

          If required by TIA Section 313(a), within 60 days after May 15 of any
year, commencing the May 15 following the date of this Indenture, the Trustee
shall mail to each Noteholder a brief report dated as of such May 15 that
complies with TIA Section 313(a).  The Trustee also shall comply with TIA
Section 313(b)(2).  The Trustee shall also transmit by mail all reports as
required by TIA Section 313(c) and TIA Section 313(d).

          Reports pursuant to this Section 7.06 shall be transmitted by mail:

          (1)  to all registered Holders, as the names and addresses of such
     Holders appear on the Registrar's books; and

          (2)  to such Holder as have, within the two years preceding such
     transmission, filed their names and addresses with the Trustee for that
     purpose.

          A copy of each report at the time of its mailing to Noteholders shall
be filed with the Commission and each stock exchange on which the Notes are
listed.  The Issuers shall promptly notify the Trustee when the Notes are listed
on any stock exchange.

 
                                     -111-

Section 7.07.  Compensation and Indemnity.
               -------------------------- 

          The Issuers shall pay to the Trustee from time to time such
compensation as shall be agreed in writing between the Issuers and the Trustee
for its services hereunder (which compensation shall not be limited by any
provision of law in regard to the compensation of a trustee of an express
trust).  The Issuers shall reimburse the Trustee upon request for all reasonable
disbursements, expenses and advances incurred or made by it in connection with
its duties under this Indenture, including the reasonable compensation,
disbursements and expenses of the Trustee's agents and counsel.

          The Issuers shall indemnify each of the Trustee and its officers,
directors, employees and agents and any predecessor Trustee and its officers,
directors, employees and agents for, and hold each of them harmless against, any
and all loss, damage, claim, liability or expense, including taxes (other than
taxes based on the income of the Trustee) incurred by any of them in connection
with the acceptance or performance of its duties under this Indenture including
the reasonable costs and expenses of defending themselves against any claim or
liability in connection with the exercise or performance of any of the powers or
duties of the Trustee hereunder (including, without limitation, settlement
costs).  The Trustee shall notify the Issuers in writing promptly of any claim
asserted against the Trustee or any such officer, director, employee or agent
for which any of them may seek indemnity.  However, the failure by the Trustee
to so notify the Issuers shall not relieve the Issuers of their obligations
hereunder except to the extent the Issuers are prejudiced thereby.  This
indemnity shall survive the termination of this Indenture, final payment of the
Notes, and resignation or removal of the Trustee.

          Notwithstanding the foregoing, the Issuers need not reimburse the
Trustee or any such officer, director, employee or agent for any expense or
indemnify any of them against any loss or liability incurred by the Trustee or
any such officer, director, employee or agent through its negligence, willful
misconduct or bad faith.  To secure the payment obligations of the Issuers in
this Section 7.07, the Trustee shall have a lien 

 
                                     -112-

prior to the Notes on all money or Property held or collected by the Trustee
except such money or Property held in trust to pay principal of and interest on
particular Notes.

          When the Trustee incurs expenses or renders services after an Event of
Default specified in Section 6.01(g) or (h) hereof occurs, the expenses and the
compensation for the services are intended to constitute expenses of
administration under any Bankruptcy Law.

          For purposes of this Section 7.07, the term "Trustee" shall include
any trustee appointed pursuant to Article 9.

Section 7.08.  Replacement of Trustee.
               ---------------------- 

          The Trustee may resign by so notifying the Issuers in writing.  The
Holders of a majority in principal amount at maturity of the outstanding Notes
may remove the Trustee by notifying the removed Trustee in writing and may
appoint a successor Trustee with the Issuers' written consent which consent
shall not be unreasonably withheld.  The Issuers may remove the Trustee at its
election if:

          (1)  the Trustee fails to comply with Section 7.10 hereof;

          (2)  the Trustee is adjudged a bankrupt or an insolvent;

          (3)  a receiver or other public officer takes charge of the Trustee or
     its Property; or

          (4)  the Trustee otherwise becomes incapable of acting.

          If the Trustee resigns or is removed or if a vacancy exists in the
office of Trustee for any reason, the Issuers shall promptly appoint a successor
Trustee.

          If a successor Trustee does not take office within 60 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Issuers or the
holders of a majority in 

 
                                     -113-

principal amount at maturity of the outstanding Notes may petition any court of
competent jurisdiction for the appointment of a successor Trustee.

          If the Trustee fails to comply with Section 7.10 hereof, any
Noteholder may petition any court of competent jurisdiction for the removal of
the Trustee and the appointment of a successor Trustee.

          A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Issuers.  Immediately following
such delivery, the retiring Trustee shall, subject to its rights under Section
7.07 hereof, transfer all property held by it as Trustee to the successor
Trustee, the resignation or removal of the retiring Trustee shall become
effective, and the successor Trustee shall have all the rights, powers and
duties of the Trustee under this Indenture.  A successor Trustee shall mail
notice of its succession to each Noteholder.  Notwithstanding replacement of the
Trustee pursuant to this Section 7.08, the Issuers' obligations under Section
7.07 hereof shall continue for the benefit of the retiring Trustee.

Section 7.09.  Successor Trustee by Consolidation, Merger or Conversion.
               --------------------------------------------------------

          If the Trustee consolidates with, merges or converts into, or
transfers all or substantially all of its corporate trust assets to, another
corporation, subject to Section 7.10 hereof, the successor corporation without
any further act shall be the successor Trustee.

Section 7.10.  Eligibility; Disqualification.
               ----------------------------- 

          This Indenture shall always have a Trustee who satisfies the
requirements of TIA Section 310(a)(1), (2) and (5) in every respect.  The
Trustee shall have a combined capital and surplus of at least $100,000,000 as
set forth in its most recent published annual report of condition.  The Trustee
shall comply with TIA Section 310(b), including the provision in Sec-

 
                                     -114-

tion 310(b)(1). The provisions of TIA Section 310 shall apply to the Issuers as
obligors of the Notes.

Section 7.11.  Preferential Collection of Claims Against Issuers.
               -------------------------------------------------

          The Trustee shall comply with TIA Section 311(a), excluding any
creditor relationship listed in TIA Section 311 (b).  A Trustee who has resigned
or been removed shall be subject to TIA Section 311(a) to the extent indicated
therein.  The provisions of TIA Section 311 shall apply to the Issuers as
obligors of the Notes.

Section 7.12.  Paying Agents.
               ------------- 

          The Issuers shall cause each Paying Agent other than the Trustee to
execute and deliver to it and the Trustee an instrument in which such agent
shall agree with the Trustee, subject to the provisions of this Section 7.12:

          (A) that it will hold all sums held by it as agent for the payment of
     Accreted Value of, or premium, if any, or interest, if any, on, the Notes
     (whether such sums have been paid to it by the Issuers or by any obligor on
     the Notes) in trust for the benefit of Holders or the Trustee;

          (B) that it will at any time during the continuance of any Event of
     Default, upon written request from the Trustee, deliver to the Trustee all
     sums so held in trust by it together with a full accounting thereof; and

          (C) that it will give the Trustee written notice within three (3)
     Business Days of any failure of the Issuers (or by any other obligor on the
     Notes) in the payment of any installment of the Accreted Value of, premium,
     if any, or interest, if any, on, the Notes when the same shall be due and
     payable.

 
                                     -115-

                                   ARTICLE 8


                      AMENDMENTS, SUPPLEMENTS AND WAIVERS

Section 8.01.  Without Consent of Holders.
               -------------------------- 

          The Issuers and the Guarantors, if any, when authorized by a Board
Resolution, and the Trustee may amend or supplement this Indenture or the Notes
without notice to or consent of any Noteholder:

          (1)  to comply with Section 5.01 hereof;

          (2)  to provide for uncertificated Notes in addition to or in place of
     Certificated Notes;

          (3)  to comply with any requirements of the Commission under the TIA;

          (4)  to cure any ambiguity, defect or inconsistency, or to make any
     other change that does not, in the opinion of the Trustee, materially and
     adversely affect the rights of any Noteholder;

          (5)  add Guarantors with respect to the Notes; or

          (6)  release Guarantors when permitted by this Indenture.

          The Trustee is hereby authorized to join with the Issuers and the
Guarantors, if any, in the execution of any supplemental indenture authorized or
permitted by the terms of this Indenture and to make any further appropriate
agreements and stipulations which may be therein contained, but the Trustee
shall not be obligated to enter into any such supplemental indenture which
adversely affects its own rights, duties or immunities under this Indenture.

 
                                     -116-

Section 8.02.  With Consent of Holders.
               ----------------------- 

          The Issuers, the Guarantors, if any, and the Trustee may modify or
supplement this Indenture or the Notes with the written consent of the Holders
of not less than a majority in principal amount at maturity of the outstanding
Notes without notice to any Noteholder.  The Holders of not less than a majority
in aggregate principal amount at maturity of the outstanding Notes may waive
compliance in a particular instance by the Issuers and the Guarantors, if any,
with any provision of this Indenture or the Notes without notice to any
Noteholder.  Subject to Section 8.04, without the consent of each Noteholder
affected, however, an amendment, supplement or waiver, including a waiver
pursuant to Section 6.04, may not:

          (1)  reduce the amount of Notes whose Holders must consent to an
     amendment, supplement or waiver to this Indenture or the Notes;

          (2)  reduce the rate of or change the time for payment of interest
     (including Additional Interest (as defined in the Registration Rights
     Agreement)) on any Note;

          (3)  reduce the Accreted Value or principal of, or premium on, or
     change the stated maturity, of any Note or change the date on which any
     Notes may be subject to redemption or repurchase or reduce the redemption
     or repurchase price therefor;

          (4)  make any Note payable in money other than that stated in the Note
     or change the place of payment from New York, New York;

          (5)  waive a Default in the payment of the Accreted Value of, or
     interest on, or any redemption payment with respect to, any Note;

          (6)  make any changes in Sections 6.04 or 6.07 hereof or this sentence
     of Section 8.02;

 
                                     -117-

          (7)   amend, change or modify in any material respect, the obligation
     of the Issuers to make and consummate a Change of Control Offer in the
     event of a Change of Control or, make and consummate an Excess Proceeds
     Offer with respect to any Asset Sale that has been consummated or modify
     any of the provisions or definitions with respect thereto;

          (8)  modify or change any provision of this Indenture or the related
     definitions affecting the ranking of the Notes or any Guarantee, if any, in
     a manner which adversely affects the Holders; or

          (9)  release any Guarantor, if any, from any of its obligations under
     its Guarantee or this Indenture otherwise than in accordance with the terms
     of this Indenture.

          After an amendment, supplement or waiver under this Section 8.02
becomes effective, the Issuers shall mail to the Holders a notice briefly
describing the amendment, supplement or waiver.

          Upon the request of the Issuers, accompanied by a Board Resolution
authorizing the execution of any such supplemental indenture, and upon the
receipt by the Trustee of evidence reasonably satisfactory to the Trustee of the
consent of the Noteholders as aforesaid and upon receipt by the Trustee of the
documents described in Section 8.06 hereof, the Trustee shall join with the
Issuers and the Guarantors in the execution of such supplemental indenture
unless such supplemental indenture affects the Trustee's own rights, duties or
immunities under this Indenture, in which case the Trustee may in its
discretion, but shall not be obligated to, enter into such supplemental
indenture.

          It shall not be necessary for the consent of the Holders under this
Section to approve the particular form of any proposed amendment, supplement or
waiver, but it shall be sufficient if such consent approves the substance
thereof.

 
                                     -118-

Section 8.03.  Compliance with Trust Indenture Act.
               ----------------------------------- 

          Every amendment to or supplement of this Indenture or the Notes shall
comply with the TIA as then in effect.

Section 8.04.  Revocation and Effect of Consents.
               --------------------------------- 

          Until an amendment, supplement, waiver or other action becomes
effective, a consent to it by a Holder is a continuing consent conclusive and
binding upon such Holder and every subsequent Holder of the same Note or portion
thereof, and of any Note issued upon the transfer thereof or in exchange
therefor or in place thereof, even if notation of the consent is not made on any
such Note.  Any such Holder or subsequent Holder, however, may revoke the
consent as to his Note or portion of a Note, if the Trustee receives the notice
of revocation before the date the amendment, supplement, waiver or other action
becomes effective.

          The Issuers may, but shall not be obligated to, fix a record date for
the purpose of determining the Holders entitled to consent to any amendment,
supplement, or waiver.  If a record date is fixed, then, notwithstanding the
preceding paragraph, those Persons who were Holders at such record date (or
their duly designated proxies), and only such Persons, shall be entitled to
consent to such amendment, supplement, or waiver or to revoke any consent
previously given, whether or not such Persons continue to be Holders after such
record date.  No such consent shall be valid or effective for more than 90 days
after such record date unless the consent of the requisite number of Holders has
been obtained.

          After an amendment, supplement, waiver or other action becomes
effective, it shall bind every Noteholder, unless it makes a change described in
any of clauses (1) through (9) of Section 8.02 hereof.  In that case the
amendment, supplement, waiver or other action shall bind each Holder who has
consented to it and every subsequent Holder of a Note or portion of a Note that
evidences the same debt as the consenting Holder's Note.

 
                                     -119-

Section 8.05.  Notation on or Exchange of Notes.
               -------------------------------- 

          If an amendment, supplement, or waiver changes the terms of a Note,
the Trustee may request the Holder to deliver it to the Trustee.  In such case,
the Trustee shall place an appropriate notation on the Note about the changed
terms and return it to the Holder.  Alternatively, if the Issuers or the Trustee
so determine, the Issuers in exchange for the Note shall issue and the Trustee
shall authenticate a new Note that reflects the changed terms.  Failure to make
the appropriate notation or issue a new Note shall not affect the validity and
effect of such amendment supplement or waiver.

Section 8.06.  Trustee to Sign Amendments, etc.
               ------------------------------- 

          The Trustee shall sign any amendment, supplement or waiver authorized
pursuant to this Article 8 if the amendment, supplement or waiver does not
materially adversely affect the rights, duties, liabilities or immunities of the
Trustee.  If it does, the Trustee may, but need not, sign it.  In signing or
refusing to sign such amendment, supplement or waiver the Trustee shall be
entitled to receive and, subject to Section 7.01 hereof, shall be fully
protected in relying upon an Officers' Certificate and an Opinion of Counsel
stating that such amendment, supplement or waiver is authorized or permitted by
this Indenture.  The Issuers and each Guarantor, if any, may not sign an
amendment or supplement until the Board of Directors of each of the Issuers and
each such Guarantor, if any, approves it.

                                   ARTICLE 9


                       DISCHARGE OF INDENTURE; DEFEASANCE

Section 9.01.  Satisfaction and Discharge of Indenture.
               --------------------------------------- 

          This Indenture shall cease to be of further effect (except as to
surviving rights of registration of transfer or exchange of Notes herein
expressly provided for) and the Trus-

 
                                     -120-

tee, on written demand of and at the expense of the Issuers, shall execute
proper instruments acknowledging satisfaction and discharge of this Indenture,
when either:

          (a) all Notes theretofore authenticated and delivered (other than (A)
     Notes which have been destroyed, lost or stolen and which have been
     replaced or paid as provided in Section 2.07 hereof and (B) Notes for whose
     payment money has theretofore been deposited in trust or segregated and
     held in trust by the Issuers and thereafter repaid to the Issuers or
     discharged from such trust) have been delivered to the Trustee for
     cancellation; or

          (b) (i) all such Notes not theretofore delivered to the Trustee for
     cancellation have become due and payable and the Issuers have irrevocably
     deposited or caused to be deposited with the Trustee in trust for the
     purpose an amount of U.S. legal tender or U.S. Government Obligations
     sufficient to pay and discharge the entire Indebtedness on such Notes not
     theretofore delivered to the Trustee for cancellation, for the Accreted
     Value or premium, if any, and interest to the date of such deposit; (ii)
     the Issuers have paid or caused to be paid all other sums payable hereunder
     by the Issuers; and (iii) the Issuers have delivered to the Trustee (A)
     irrevocable instructions to apply the deposited money toward payment of the
     Notes at the maturity thereof, and (B) an Officers' Certificate and an
     Opinion of Counsel each stating that all conditions precedent herein
     provided for relating to the satisfaction and discharge of this Indenture
     have been complied with.

Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Issuers to the Trustee under Section 7.07 and, if money shall
have been deposited with the Trustee pursuant to subclause (a)(B) of this
Section 9.01, the obligations of the Trustee under Section 9.05, shall survive.

Section 9.02.  Legal Defeasance.
               ---------------- 

          The Issuers may at their option, by Board Resolution, be discharged
from their obligations with respect to the Notes 

 
                                     -121-

and the Guarantors discharged from their obligations under the Guarantees
(hereinafter, "Legal Defeasance"). For this purpose, such Legal Defeasance means
that the Issuers shall be deemed to have paid and discharged the entire
indebtedness represented by the Notes and to have satisfied all of their other
obligations under such Notes and this Indenture insofar as such Notes are
concerned (and the Trustee, at the expense of the Issuers, shall, subject to
Section 9.06 hereof, execute proper instruments acknowledging the same), except
for the following which shall survive until otherwise terminated or discharged
hereunder: (A) the rights of Holders of outstanding Notes to receive solely from
the trust funds described in Section 9.04 hereof and as more fully set forth in
such Section, payments in respect of the Accreted Value of, premium, if any, and
interest on such Notes when such payments are due, (B) the Issuers' obligations
with respect to such Notes under Article 2 and Section 4.17 hereof, (C) the
rights, powers, trusts, duties, and immunities of the Trustee hereunder
(including claims of, or payments to, the Trustee under or pursuant to Section
7.07 hereof) and (D) this Article 9. Subject to compliance with this Article 9,
the Issuers may exercise their option under this Section 9.02 with respect to
the Notes notwithstanding the prior exercise of their option under Section 9.03
below with respect to the Notes.

Section 9.03.  Covenant Defeasance.
               ------------------- 

          At the option of the Issuers, pursuant to a Board Resolution, the
Issuers and the Guarantors, if any, shall be released from their respective
obligations under Sections 4.02, 4.04 through 4.14, 4.16, and 4.18 through 4.23
hereof, and clause (3) of the first paragraph of Section 5.01 hereof with
respect to the outstanding Notes on and after the date the conditions set forth
in Section 9.04 hereof are satisfied (hereinafter, "Covenant Defeasance").  For
this purpose, such Covenant Defeasance means that the Issuers may omit to comply
with and shall have no liability in respect of any term, condition or limitation
set forth in any such specified Section or portion thereof, whether directly or
indirectly by reason of any reference elsewhere herein to any such specified
Section or portion 

 
                                     -122-

thereof or by reason of any reference in any such specified Section or portion
thereof to any other provision herein or in any other document, but the
remainder of this Indenture and the Notes shall be unaffected thereby.

Section 9.04.  Conditions to Defeasance or Covenant Defeasance.
               -----------------------------------------------

          The following shall be the conditions to application of Section 9.02
or Section 9.03 hereof to the outstanding Notes:

          (1)  the Issuers shall irrevocably have deposited or caused to be
     deposited with the Trustee (or another trustee satisfying the requirements
     of Section 7.10 hereof who shall agree to comply with the provisions of
     this Article 9 applicable to it) as funds in trust for the purpose of
     making the following payments, specifically pledged as security for, and
     dedicated solely to, the benefit of the Holders, (A) U.S. legal tender in
     an amount, or (B) U.S. Government Obligations which through the scheduled
     payment of principal and interest in respect thereof in accordance with
     their terms will provide, not later than the due date of any payment, money
     in an amount, or (C) a combination thereof, sufficient, in the opinion of a
     nationally-recognized firm of independent public accountants expressed in a
     written certification thereof delivered to the Trustee, to pay and
     discharge, and which shall be applied by the Trustee (or other qualifying
     trustee) to pay and discharge, the Accreted Value of, premium, if any, and
     accrued interest on the outstanding Notes at the maturity date of such
     Accreted Value, premium, if any, or interest, or on dates for payment and
     redemption of such Accreted Value, premium, if any, and interest selected
     in accordance with the terms of this Indenture and of the Notes; provided,
                                                                      -------- 
     however, that the Trustee (or other qualifying trustee) shall have received
     -------                                                                    
     an irrevocable written order from the Issuers instructing the Trustee (or
     other qualifying trustee) to apply such money or the proceeds of such U.S.
     Government Obligations to said payments with respect to the Notes;

 
                                     -123-

          (2)  no Event of Default or Default shall have occurred and no Event
     of Default of the type specified in Section 6.01(g) or (h) shall have
     occurred and be continuing on the date of such deposit, or shall have
     occurred and be continuing at any time during the period ending on the 91st
     day after the date of such deposit or, if longer, ending on the day
     following the expiration of the longest preference period under any
     Bankruptcy Law applicable to the Issuers in respect of such deposit (it
     being understood that this condition shall not be deemed satisfied until
     the expiration of such period);

          (3)  such Legal Defeasance or Covenant Defeasance shall not cause the
     Trustee to have a conflicting interest for purposes of the TIA with respect
     to any securities of the Issuers;

          (4)  such Legal Defeasance or Covenant Defeasance shall not result in
     a breach or violation of, or constitute default under any other material
     agreement or instrument to which the Issuers or any of their Subsidiaries
     are a party or by which any Issuer or any of its Subsidiaries is bound;

          (5)  the Issuers shall have delivered to the Trustee an Opinion of
     Counsel stating that, as a result of such Legal Defeasance or Covenant
     Defeasance, neither the trust nor the Trustee will be required to register
     as an investment company under the Investment Company Act of 1940, as
     amended;

          (6)  in the case of an election under Section 9.02 above, the Issuers
     shall have delivered to the Trustee an Opinion of Counsel stating that (i)
     the Issuers have received from, or there has been published by, the
     Internal Revenue Service a ruling to the effect that or (ii) there has been
     a change in any applicable Federal income tax law with the effect that, and
     such opinion shall confirm that, the Holders of the outstanding Notes or
     persons in their positions will not recognize income, gain or loss for
     Federal income tax purposes solely as a result of such Legal 

 
                                     -124-

     Defeasance and will be subject to Federal income tax on the same amounts,
     in the same manner, including as a result of prepayment, and at the same
     times as would have been the case if such Legal Defeasance had not
     occurred;

          (7)  in the case of an election under Section 9.03 hereof, the Issuers
     shall have delivered to the Trustee an Opinion of Counsel describing either
     a private ruling concerning the Notes or a published ruling of the Internal
     Revenue Service to the effect that the Holders of the outstanding Notes
     will not recognize income, gain or loss for Federal income tax purposes as
     a result of such Covenant Defeasance and will be subject to Federal income
     tax on the same amounts, in the same manner and at the same times as would
     have been the case if such Covenant Defeasance had not occurred;

          (8)  the Issuers shall have delivered to the Trustee an Officers'
     Certificate and an Opinion of Counsel, each stating that all conditions
     precedent provided for relating to either the Legal Defeasance under
     Section 9.02 above or the Covenant Defeasance under Section 9.03 hereof (as
     the case may be) have been complied with;

          (9)  the Issuers shall have delivered to the Trustee an Officers'
     Certificate stating that the deposit under clause (1) was not made by the
     Issuers with the intent of preferring the holders of the Notes over any
     other creditors of the Issuers or with the intent of defeating, hindering,
     delaying or defrauding any creditors of the Issuers or others; and

          (10)  the Issuers shall have delivered to the Trustee an Opinion of
     Counsel to the effect that:

          (a)  the funds deposited in trust will not be subject to any rights of
               holders of Senior Indebtedness, including, without limitation,
               those arising under this Indenture, and

 
                                     -125-

          (b)  assuming no intervening event of the type described in Section
               6.01(g) or (h) shall occur and no Holder is an "insider" (as such
               term is used under applicable Bankruptcy Law) of any Issuer after
               the 91st day after the date of such deposit or, if longer, ending
               on the day following the expiration of the longest preference
               period under any Bankruptcy Law applicable to the Issuers in
               respect of such deposit, the funds deposited in trust will not be
               subject to the effect of any Bankruptcy Law; and

          (11)  before or after a deposit, the Issuers may make arrangements
     satisfactory to the Trustee for the redemption of Notes at a future date in
     accordance with Section 3.07(a) hereof.

Section 9.05.  Deposited Money and U.S. Government Obligations to Be Held in
               Trust; Other Miscellaneous Provisions.
                            -------------------------

          All money and U.S. Government Obligations (including the proceeds
thereof) deposited with the Trustee pursuant to Section 9.01 or 9.04 hereof in
respect of the outstanding Notes shall be held in trust and applied by the
Trustee, in accordance with the provisions of such Notes and this Indenture, to
the payment, either directly or through any Paying Agent as the Trustee may
determine, to the Holders of such Notes, of all sums due and to become due
thereon in respect of Accreted Value, premium, if any, and accrued interest, if
any, but such money need not be segregated from other funds except to the extent
required by law.

          The Issuers and the Guarantors shall pay and indemnify the Trustee
against any tax, fee or other charge imposed on or assessed against the U.S.
Government Obligations deposited pursuant to Section 9.01 or 9.04 hereof or the
principal, premium, if any, and interest received in respect thereof other than
any such tax, fee or other charge which by law is for the account of the Holders
of the outstanding Notes.

 
                                     -126-

          Anything in this Article 9 to the contrary notwithstanding, the
Trustee shall deliver or pay to the Issuers from time to time upon a written
request of the Issuers in the form of an Officers' Certificate any money or U.S.
Government Obligations held by it as provided in Section 9.01 or 9.04 hereof
which, in the opinion of a nationally-recognized firm of independent public
accountants expressed in a written certification thereof delivered to the
Trustee, are in excess of the amount thereof which would then be required to be
deposited to effect an equivalent Legal Defeasance or Covenant Defeasance.

Section 9.06.  Reinstatement.
               ------------- 

          If the Trustee or Paying Agent is unable to apply any money or U.S.
Government Obligations in accordance with Section 9.01, 9.02 or 9.03 hereof by
reason of any legal proceeding or by reason of any order or judgment of any
court or governmental authority enjoining, restraining or otherwise prohibiting
such application, the Issuers' and each Guarantor's, if any, obligations under
this Indenture, the Notes and the Guarantees, if any, shall be revived and
reinstated as though no deposit had occurred pursuant to this Article 9 until
such time as the Trustee or Paying Agent is permitted to apply all such money or
U.S. Government Obligations in accordance with Section 9.01 hereof; provided,
                                                                    -------- 
however, that if the Issuers or the Guarantors, if any, have made any payment of
- -------                                                                         
Accreted Value of, premium, if any, or accrued interest on any Notes because of
the reinstatement of their obligations, the Issuers and each such Guarantor
shall be subrogated to the rights of the Holders of such Notes to receive such
payment from the money or U.S. Government Obligations held by the Trustee or
Paying Agent.

Section 9.07.  Moneys Held by Paying Agent.
               --------------------------- 

          In connection with the satisfaction and discharge of this Indenture,
all moneys then held by any Paying Agent under the provisions of this Indenture
shall, upon demand of the Issuers, be paid to the Trustee, or if sufficient
moneys have been deposited pursuant to Section 9.01 hereof, to the Issuers (or,
if such moneys had been deposited by any Guarantor, to 

 
                                     -127-

such Guarantor) and thereupon such Paying Agent shall be released from all
further liability with respect to such moneys.

Section 9.08.  Moneys Held by Trustee.
               ---------------------- 

          Any moneys deposited with the Trustee or any Paying Agent or then held
by the Issuers or any Guarantor, if any, in trust for the payment of the
Accreted Value of, or premium, if any, or interest, if any, on any Note that are
not applied but remain unclaimed by the Holder of such Note for two years after
the date upon which the Accreted Value of, or premium, if any, or interest, if
any, on such Note shall have respectively become due and payable shall be repaid
to the Issuers (or, if appropriate, the applicable Guarantor) upon a written
request of the Issuers in the form of an Officers' Certificate, or if such
moneys are then held by the Issuers or any Guarantor, if any, in trust, such
moneys shall be released from such trust; and the Holder of such Note entitled
to receive such payment shall thereafter, as an unsecured general creditor, look
only to the Issuers and the Guarantors, if any, for the payment thereof, and all
liability of the Trustee or such Paying Agent with respect to such trust money
shall thereupon cease.

                                   ARTICLE 10


                                   GUARANTEES

Section 10.01.  Guarantees.
                ---------- 

          Each Guarantor, if any, hereby unconditionally and irrevocably
guarantees, jointly and severally, to each Holder and to the Trustee on behalf
of the Holders and its successors and assigns (a) the due and punctual payment
of principal of, premium, if any, and interest on the Notes when due, whether at
maturity, by acceleration, by redemption or otherwise, and all other monetary
obligations of the Issuers under this Indenture, the Notes and the Registration
Rights Agreement and (b) the full and punctual performance within applicable
grace periods of all other obligations of the Issuers under this Indenture, 

 
                                     -128-

the Notes and the Registration Rights Agreement (all the foregoing being
hereinafter collectively called the "Guaranteed Obligations"). Each Guarantor,
if any, further agrees that the Guaranteed Obligations may be extended or
renewed, in whole or in part, without notice or further assent from such
Guarantor and that such Guarantor will remain bound under this Article 10
notwithstanding any extension or renewal of any Guaranteed Obligation.

          Each Guarantor, if any, waives diligence, presentment, demand of
payment, filing of claims with a court in the event of insolvency or bankruptcy
of any Issuer, any right to require a proceeding first against the Issuer,
protest, notice and all demands whatsoever.  Each Guarantor, if any, waives
notice of any default under the Notes or the Guaranteed Obligations.  The
obligations of each Guarantor, if any, hereunder shall not be affected by (a)
the failure of any Holder or the Trustee to assert any claim or demand or to
enforce any right or remedy against the Company or any other Person under this
Indenture, the Notes or any other agreement or otherwise; (b) any extension or
renewal of any thereof; (c) any rescission, waiver, amendment or modification of
any of the terms or provisions of this Indenture, the Notes or any other
agreement; (d) the release of any security held by any Holder or the Trustee for
the Guaranteed Obligations or any of them; (e) the failure of any Holder or the
Trustee to exercise any right or remedy against any other guarantor of the
Guaranteed Obligations; or (f) except as provided in Section 10.06, any change
in the ownership of such Guarantor.

          Except as expressly set forth in Sections 10.02 and 10.06, the
obligations of each Guarantor, if any, hereunder shall not be subject to any
reduction, limitation, impairment or termination for any reason, including any
claim of waiver, release, surrender, alteration or compromise, and shall not be
subject to any defense of setoff, counterclaim, recoupment or termination
whatsoever or by reason of the invalidity, illegality or unenforceability of the
Guaranteed Obligations or otherwise.  Without limiting the generality of the
foregoing, the obligations of each Guarantor, if any, herein shall not be
dis-

 
                                     -129-

charged or impaired or otherwise affected by the failure of any Holder or the
Trustee to assert any claim or demand or to enforce any remedy under this
Indenture, the Notes or any other agreement, by any waiver or modification of
any thereof, by any default, failure or delay, willful or otherwise, in the
performance of the Guaranteed Obligations, or by any other act or thing or
omission or delay to do any other act or thing which may or might in any manner
or to any extent vary the risk of such Guarantor or would otherwise operate as a
discharge of such Guarantor as a matter of law or equity.

          Each Guarantor, if any, further agrees that its Guarantee herein shall
continue to be effective or be reinstated, as the case may be, if at any time
payment, or any part thereof, of principal of, premium, if any, or interest on
any Guaranteed Obligation is rescinded or must otherwise be restored by any
Holder or the Trustee upon the bankruptcy or reorganization of any Issuer or
otherwise.

          In furtherance of the foregoing and not in limitation of any other
right which any Holder or the Trustee has at law or in equity against any
Guarantor by virtue hereof, upon the failure of any Issuer to pay the principal
of, premium, if any, or interest on any obligation under the Notes or this
Indenture when and as the same shall become due, whether at maturity, by
acceleration, by redemption or otherwise, or to perform or comply with any other
obligation under the Notes or this Indenture, each Guarantor, if any, hereby
promises to and will, upon receipt of written demand by the Trustee, forthwith
pay, or cause to be paid, in cash, to the Holders or the Trustee an amount equal
to the sum of (i) the unpaid amount of such Guaranteed Obligations, (ii) accrued
and unpaid interest on such Guaranteed Obligations (but only to the extent not
prohibited by law) and (iii) all other monetary Guaranteed Obligations of the
Issuers to the Holders and the Trustee.

          Each Guarantor, if any, agrees that it shall not be entitled to any
right of subrogation in respect of any Guaranteed Obligations guaranteed hereby
until payment in full of all Guaranteed Obligations.  Each Guarantor, if any,
further agrees that, as between it, on the one hand, and the Holders and the

 
                                     -130-

Trustee, on the other hand, (x) the maturity of the Guaranteed Obligations
hereby may be accelerated as provided in Section 6 for the purposes of such
Guarantor's Guarantee herein, notwithstanding any stay, injunction or other
prohibition preventing such acceleration in respect of the obligations under the
Notes or this Indenture guaranteed hereby, and (y) in the event of any
declaration of acceleration of such obligations as provided in Section 6, such
obligations (whether or not due and payable) shall forthwith become due and
payable by such Guarantor for the purposes of this Section.

          Each Guarantor, if any, also agrees to pay any and all costs and
expenses (including reasonable attorneys' fees) incurred by the Trustee or any
Holder in enforcing any rights under this Article 10.

Section 10.02.  Limitation on Liability.
                ----------------------- 

          Any term or provision of this Indenture to the contrary
notwithstanding, the maximum aggregate amount of the obligations guaranteed
hereunder by any Guarantor shall not exceed the maximum amount that can be
hereby guaranteed without rendering this Indenture, as it relates to such
Guarantor, voidable under applicable law relating to fraudulent conveyance or
fraudulent transfer or similar laws affecting the rights of creditors generally.
To effectuate the foregoing intention, the obligations of each Guarantor, if
any, shall be limited to the maximum amount as will, after giving effect to all
other contingent and fixed liabilities of such Guarantor and after giving effect
to any collections from or payments made by or on behalf of any other Guarantor,
if any, in respect of the obligations of such other Guarantor under its
Guarantee or pursuant to its contribution obligations hereunder, result in the
obligations of such Guarantor under its Guarantee not constituting a fraudulent
conveyance or fraudulent transfer under federal or state law.  Each Guarantor
that makes a payment or distribution under a Guarantee shall be entitled to a
contribution from each other Guarantor in a pro rata amount based on the
                                            --- ----                    
Adjusted Net Assets of each Guarantor.

 
                                     -131-

          In case any provision of this Guarantee shall be invalid, illegal or
unenforceable, the validity, legality, and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby.

Section 10.03.  Successors and Assigns.
                ---------------------- 

          This Article 10 shall be binding upon each Guarantor and its
successors and assigns and shall enure to the benefit of the successors and
assigns of the Trustee and the Holders and, in the event of any transfer or
assignment of rights by any Holder or the Trustee, the rights and privileges
conferred upon that party in this Indenture and in the Notes shall automatically
extend to and be vested in such transferee or assignee, all subject to the terms
and conditions of this Indenture.

Section 10.04.  No Waiver.
                --------- 

          Neither a failure nor a delay on the part of either the Trustee or the
Holders in exercising any right, power or privilege under this Article 10 shall
operate as a waiver thereof, nor shall a single or partial exercise thereof
preclude any other or further exercise of any right, power or privilege.  The
rights, remedies and benefits of the Trustee and the Holders herein expressly
specified are cumulative and not exclusive of any other rights, remedies or
benefits which either may have under this Article 10 at law, in equity, by
statute or otherwise.

Section 10.05.  Modification.
                ------------ 

          No modification, amendment or waiver of any provision of this Article
10, nor the consent to any departure by any Guarantor therefrom, shall in any
event be effective unless the same shall be in writing and signed by the
Trustee, and then such waiver or consent shall be effective only in the specific
instance and for the purpose for which given.  No notice to or demand on any
Guarantor in any case shall entitle such Guarantor to any other or further
notice or demand in the same, similar or other circumstances.

 
                                     -132-

Section 10.06.  Release of Guarantor.
                -------------------- 

          A Guarantor shall be released from all of its obligations under its
Guarantee if:

            (i) (a) the Guarantor has sold all or substantially all of its
     assets or the Company and its Restricted Subsidiaries have sold all of the
     Capital Stock of the Guarantor owned by them, in each case in a transaction
     in compliance with Sections 4.09 and 5.01 hereof and (b) such Guarantor is
     unconditionally released from all of the Obligations under the Indebtedness
     described in Section 4.08 which resulted in the requirement that such
     Guarantor Guarantee the Notes;

            (ii) (a) the Guarantor merges with or into or consolidates with, or
     transfers all or substantially all of its assets to, the Company or another
     Guarantor in a transaction in compliance with Section 5.01 hereof and (b)
     such Guarantor is unconditionally released from all of the Obligations
     under the Indebtedness described in Section 4.08 which resulted in the
     requirement that such Guarantor Guarantee the Notes; or

            (iii)  such Guarantor is unconditionally released from all of the
     Obligations under the Indebtedness described in Section 4.08 which resulted
     in the requirement that such Guarantor Guarantee the Notes;

and in each such case, such Guarantor has delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that all conditions
precedent herein provided for relating to such transactions have been complied
with.

Section 10.07.  Execution of Supplemental Indenture for Future Guarantors.
                ----------------------------------------------------------

          Each Subsidiary which is required to become a Guarantor pursuant to
Section 4.08 shall, and the Issuers shall cause each such Subsidiary to,
promptly execute and deliver to the Trustee a supplemental indenture in the form
of Exhibit F 
   ---------

 
                                     -133-

hereto pursuant to which such Subsidiary shall become a Guarantor under this
Section 10 and shall guarantee the obligations of the Company under the Notes
and this Indenture. Concurrently with the execution and delivery of such
supplemental indenture, the Company shall deliver to the Trustee an Opinion of
Counsel to the effect that such supplemental indenture has been duly authorized,
executed and delivered by such Subsidiary and that, subject to the application
of bankruptcy, insolvency, moratorium, fraudulent conveyance or transfer and
other similar laws relating to creditors' rights generally and to the principles
of equity, whether considered in a proceeding at law or in equity, the Guarantee
of such Guarantor is a legal, valid and binding obligation of such Guarantor,
enforceable against such Guarantor in accordance with its terms.

Section 10.08.  Execution and Delivery of Guarantees.
                ------------------------------------ 

          To evidence the Guarantee set forth in this Article 10, each Guarantor
hereby agrees that a notation of such Guarantee substantially in the form of
                                                                            
Exhibit E hereto shall be placed on each Note authenticated and made available
- ---------                                                                     
for delivery by the Trustee and that this Guarantee shall be executed on behalf
of each Guarantor by the manual or facsimile signature of two Officers or an
Officer and the Secretary of each Guarantor.

          Each Guarantor hereby agrees that the Guarantee set forth in Section
10.01 shall remain in full force and effect notwithstanding any failure to
endorse on each Note a notation of such Guarantee.

          If an Officer of a Guarantor whose signature is on the Guarantee no
longer holds that office at the time the Trustee authenticates the Note on which
the Guarantee is endorsed, the Guarantee shall be valid nevertheless.

          The delivery of any Note by the Trustee, after the authentication
thereof hereunder, shall constitute due delivery of the Guarantee set forth in
this Indenture on behalf of each Guarantor.

 
                                     -134-

                                   ARTICLE 11


                      INTERCREDITOR AGREEMENT WITH LENDERS

                        UNDER THE SENIOR CREDIT FACILITY

Section 11.01.  Non-Petition Covenant.
                --------------------- 

          Each Holder, by accepting the Note or Notes issued to it, covenants
and agrees that, prior to the indefeasible payment and satisfaction in full in
cash of all outstanding Obligations under the Senior Credit Facility, neither it
nor the Trustee shall (a) institute against, or join any other Person in
instituting against, or intervene with respect to, Muzak LLC, any involuntary
bankruptcy, reorganization, arrangement, insolvency, receivership or liquidation
case under the laws of the United States or any state of the United States or
(b) in any voluntary or involuntary bankruptcy case of any Issuer, seek a
substantive consolidation of the estate of such Issuer with the estates of Muzak
LLC and/or Muzak Finance.

Section 11.02.  Subordination Upon Substantive Consolidation.
                ---------------------------------------------

          Notwithstanding Section 11.01 hereof (and without limitation of any
other rights or remedies of any holder of Indebtedness under the Senior Credit
Facility), upon any substantive consolidation of the estate of any Issuer with
the estates of Muzak LLC and/or Muzak Finance in any bankruptcy, reorganization,
arrangement, insolvency, receivership, liquidation or similar case relating to
such Issuer or its property, the Issuers agree, and each Holder by accepting a
Note agrees, that the Indebtedness evidenced by the Notes and all Obligations
under the Notes, the Registration Rights Agreement and the Indenture with
respect thereto, including recission claims, are subordinated in right of
payment, to the extent and in the manner provided in this Article 11, to the
prior indefeasible payment and satisfaction in full in cash of all Indebtedness
under the Senior Credit Facility (whether outstanding on the date hereof or
hereafter created, incurred, assumed or guaranteed), and that the subordination
is for the benefit of the holders of Indebt-

 
                                     -135-

edness under the Senior Credit Facility. In the event of any such substantive
consolidation of the estate of any Issuer with the estates of Muzak LLC and/or
Muzak Finance:

          (1)  holders of Indebtedness under the Senior Credit Facility shall be
     entitled to receive payment in full in cash of all Obligations due in
     respect of such Indebtedness under the Senior Credit Facility (including
     interest after the commencement of any such proceeding at the rate
     specified in the Senior Credit Facility), before Holders of the Notes shall
     be entitled to receive any payment with respect to the Notes or any
     Obligations under the Notes, the Registration Rights Agreement or the
     Indenture with respect thereto, including recission claims (except that
     Holders may receive payments and other distributions made from any
     defeasance trust created pursuant to Section 9.04 hereof); and

          (2)  until all Obligations with respect to Indebtedness under the
     Senior Credit Facility (as provided in subsection (1) above) are paid in
     full in cash, any distribution to which Holders would be entitled but for
     this Article 11 shall be made to holders of Indebtedness under the Senior
     Credit Facility or their representative (except that Holders of Notes may
     receive payments and other distributions made from any defeasance trust
     created pursuant to Section 9.04 hereof), as their interests may appear.

Section 11.03.  When Distribution Must be Paid Over.
                ----------------------------------- 

          In the event that, notwithstanding the foregoing provisions of Section
11.02, the Trustee or any Holder receives any payment or distribution of assets
of any Issuer of any kind, whether in cash, property or securities, including,
without limitation, by way of set-off or otherwise, in respect of the Notes or
any Obligations under the Notes, the Registration Rights Agreement or the
Indenture, before all Indebtedness under the Senior Credit Facility is
indefeasibly paid and satisfied in full in cash, then such payment or
distribution (other than a payment or distribution from the trust described in
Section 9.04) will be held by the recipient in trust for the bene-

 
                                     -136-

fit of holders of Indebtedness under the Senior Credit Facility and will be
immediately paid over or delivered to the holders of Indebtedness under the
Senior Credit Facility or their representative to the extent necessary to make
payment in full of all Indebtedness under the Senior Credit Facility remaining
unpaid, after giving effect to any concurrent payment or distribution, or
provision therefor, to or for the holders of Indebtedness under the Senior
Credit Facility as provided for in Section 11.02.

Section 11.04.  Trustee's Relation to Senior Indebtedness.
                ----------------------------------------- 

          With respect to the holders of Indebtedness under the Senior Credit
Facility, the Trustee undertakes to perform or to observe only such of its
covenants and obligations as are specifically set forth in this Article 11, and
no implied covenants or obligations with respect to the holders of Indebtedness
under the Senior Credit Facility shall be read into this Indenture against the
Trustee.  The Trustee shall not be deemed to owe any fiduciary duty to the
holders of Indebtedness under the Senior Credit Facility and the Trustee shall
not be liable to any holder of Indebtedness under the Senior Credit Facility
(other than for its willful misconduct or negligence) if it shall mistakenly pay
over or deliver to Holders, any Issuer or any other Person moneys or assets to
which any holder of Indebtedness under the Senior Credit Facility shall be
entitled by virtue of this Article 11 or otherwise.  Nothing in this Section
11.04 shall affect the obligation of any other such Person receiving such
payment or distribution from the Trustee or any other Agent to hold such payment
for the benefit of, and to pay such payment over to, the holders of Indebtedness
under the Senior Credit Facility.

Section 11.05.  Subrogation of Rights of Holders of Senior Indebtedness.
                -------------------------------------------------------

          Upon the payment in full of all Indebtedness under the Senior Credit
Facility, the Holders shall be subrogated to the rights of the holders of such
Indebtedness under the Senior Credit Facility to receive payments and
distributions of cash, Property and securities applicable to the Indebtedness
under 

 
                                     -137-

the Senior Credit Facility until the Accreted Value of, premium, if any and
interest on the Notes shall be paid in full. For purposes of such subrogation,
no payments or distributions to the holders of Indebtedness under the Senior
Credit Facility of any cash, property or securities to which the Holders or the
Trustee would be entitled except for the provisions of this Article 11, and no
payments over pursuant to the provisions of this Article 11 to the holders of
Indebtedness under the Senior Credit Facility by Holders or the Trustee, shall,
as among any Issuer, its creditors other than holders of Indebtedness under the
Senior Credit Facility and the Holders, be deemed to be a payment or
distribution by such Issuer to or on account of the Indebtedness under the
Senior Credit Facility.

          If any payment or distribution to which the Holders would otherwise
have been entitled but for the provisions of this Article 11 shall have been
applied, pursuant to the provisions of this Article 11, to the payment of all
amounts payable under the Indebtedness under the Senior Credit Facility of any
Issuer, then and in such case the Holders shall be entitled to receive from the
holders of such Indebtedness under the Senior Credit Facility at the time
outstanding any payments or distributions received by such holders of such
Indebtedness under the Senior Credit Facility in excess of the amount sufficient
to pay all amounts payable under or in respect of such Indebtedness under the
Senior Credit Facility in full in cash.

Section 11.06.  Provisions Solely to Define Relative Rights.
                --------------------------------------------

          The provisions of this Article 11 are and are intended solely for the
purpose of defining the relative rights of the Holders on the one hand and the
holders of Indebtedness under the Senior Credit Facility on the other hand.
Nothing contained in this Article 11 or elsewhere in this Indenture or in the
Notes is intended to or shall (a) impair, as among any Issuer, its creditors
other than holders of Indebtedness under the Senior Credit Facility and the
Holders, the obligation of the Issuers, which is absolute and unconditional, to
pay to the Holders the Accreted Value of, premium, if any, and interest on the
Notes as and when the same shall become due and payable in 

 
                                     -138-

accordance with their terms; or (b) affect the relative rights against the
Issuers of the Holders and creditors of the Issuers other than the holders of
Indebtedness under the Senior Credit Facility; or (c) prevent the Trustee or any
Holder from exercising all remedies otherwise permitted by applicable law upon a
Default or an Event of Default under this Indenture, subject to the rights, if
any, under this Article 11 of the holders of Indebtedness under the Senior
Credit Facility in any bankruptcy, reorganization, arrangement, insolvency or
liquidation case, referred to in Section 11.01 hereof, to receive, pursuant to
and in accordance with such Section, cash, property and securities otherwise
payable or deliverable to the Trustee or such Holder.

          The failure to make a payment on account of the Accreted Value of,
premium, if any, or interest on the Notes by reason of any provision of this
Article 11 shall not be construed as preventing the occurrence of a Default or
an Event of Default hereunder.

Section 11.07.  Trustee to Effectuate Subordination.
                ----------------------------------- 

          Each Holder of a Note by his acceptance thereof authorizes and directs
the Trustee on his behalf to take such action as may be necessary or appropriate
to effectuate the subordination provided in this Article and appoints the
Trustee his attorney-in-fact for any and all such purposes, including, in the
event of any dissolution, winding-up, liquidation or reorganization of any
Issuer whether in bankruptcy, insolvency, receivership proceedings, or
otherwise, the timely filing of a claim for the unpaid balance of the
indebtedness of any Issuer owing to such Holder in the form required in such
proceedings and the causing of such claim to be approved.  If the Trustee does
not file such a claim prior to 30 days before the expiration of the time to file
such a claim, the holders of Senior Indebtedness, or any Representative, is
hereby authorized to have the right to file such a claim for or on behalf of the
Holders, and the Trustee shall supply such holders and representatives all
information and copies of documents in the Trustee's possession and relating to
this Indenture, the Notes or 

 
                                     -139-

the Issuers, which such holders or representatives reasonably request an order
to file such claims.

Section 11.08.  No Waiver of Subordination Provisions.
                ------------------------------------- 

          (a) No right of any present or future holder of any Indebtedness under
the Senior Credit Facility to enforce subordination as herein provided shall at
any time in any way be prejudiced or impaired by any act or failure to act on
the part of any Issuer or by any act or failure to act, in good faith, by any
such holder, or by any non-compliance by any Issuer with the terms, provisions
and covenants of this Indenture, regardless of any knowledge thereof any such
holder may have or be otherwise charged with.

          (b) Without limiting the generality of subsection (a) of this Section
11.08, the holders of Indebtedness under the Senior Credit Facility may, at any
time and from time to time, without the consent of or notice to the Trustee or
the Holders, without incurring responsibility to the Holders and without
impairing or releasing the subordination provided in this Article 11 or the
obligations hereunder of the Holders to the holders of Indebtedness under the
Senior Credit Facility, do any one or more of the following:  (1) change the
manner, place or terms of payment or extend the time of payment of, or renew or
alter, Indebtedness under the Senior Credit Facility or otherwise amend or
supplement in any manner such Indebtedness or any instrument evidencing the same
or any agreement under which Indebtedness under the Senior Credit Facility is
outstanding; (2) sell, exchange, release or otherwise deal with any property
pledged, mortgaged or otherwise securing Indebtedness under the Senior Credit
Facility; (3) release any Person liable in any manner for the collection or
payment of Indebtedness under the Senior Credit Facility; and (4) exercise or
refrain from exercising any rights against the Issuers and any other Person;
                                                                            
provided, however, that in no event shall any such actions limit the right of
- --------  -------                                                            
the Holders to take any action to accelerate the maturity of the Notes pursuant
to Article 6 hereof or to pursue any rights or remedies hereunder or under
applicable laws if the taking of such action does not otherwise violate the
terms of this Indenture.

 
                                     -140-

Section 11.09.  Notice to Trustee.
                ----------------- 

          (a) The Issuers shall give prompt written notice to the Trustee of any
fact known to the Issuers which would prohibit the making of any payment to or
by the Trustee at its Corporate Trust Office in respect of the Notes.
Notwithstanding the provisions of this Article 11 or any other provision of this
Indenture, the Trustee shall not be charged with knowledge of the existence of
any facts which would prohibit the making of any payment to or by the Trustee in
respect of the Notes, unless and until the Trustee shall have received written
notice thereof from the Issuers or a holder of Indebtedness under the Senior
Credit Facility or from any trustee, fiduciary or agent therefor; and, prior to
the receipt of any such written notice, the Trustee, subject to the provisions
of this Section 11.09, shall be entitled in all respects to assume that no such
facts exist; provided, however, that if the Trustee shall not have received the
             --------  -------                                                 
notice provided for in this Section 11.09 in accordance with Section 12.02 at
least two Business Days prior to the date upon which by the terms hereof any
money may become payable for any purpose under this Indenture (including,
without limitation, the payment of the Accreted Value of, premium, if any, or
interest on any Note), then, anything herein contained to the contrary
notwithstanding but without limiting the rights and remedies of the holders of
Indebtedness under the Senior Credit Facility or any trustee, fiduciary or agent
therefor, the Trustee shall have full power and authority to receive such money
and to apply the same to the purpose for which such money was received and shall
not be affected by any notice in accordance with Section 12.02 to the contrary
which may be received  by it within two Business Days prior to such date; nor
shall the Trustee be charged with knowledge of the curing of any such default or
the elimination of the act or condition preventing any such payment unless and
until the Trustee shall have received an Officers' Certificate to such effect.

          (b) Subject to the provisions of Section 7.01 hereof, the Trustee
shall be entitled to rely on the delivery to it of a written notice to the
Trustee and the Issuers by a 

 
                                     -141-

Person representing itself to be a holder of Indebtedness under the Senior
Credit Facility (or a trustee, fiduciary or agent therefor) to establish that
such notice has been given by a holder of Indebtedness under the Senior Credit
Facility (or a trustee, fiduciary or agent therefor); provided, however, that
                                                      --------  -------
failure to give such notice to the Issuers shall not affect in any way the
ability of the Trustee to rely on such notice. In the event that the Trustee
determines in good faith that further evidence is required with respect to the
right of any Person as a holder of Indebtedness under the Senior Credit Facility
to participate in any payment or distribution pursuant to this Article 11, the
Trustee may request such Person to furnish evidence to the reasonable
satisfaction of the Trustee as to the amount of Indebtedness under the Senior
Credit Facility held by such Person, the extent to which such Person is entitled
to participate in such payment or distribution and any other facts pertinent to
the rights of such Person under this Article 11, and if such evidence is not
furnished, the Trustee may defer any payment to such Person pending judicial
determination as to the right of such Person to receive such payment.

Section 11.10. Reliance on Judicial Order or Certificate of Liquidating Agent.
               --------------------------------------------------------------

          Upon any payment or distribution of assets of the Issuers referred to
in this Article 11, the Trustee, subject to the provisions of Section 7.01
hereof, and the Holders shall be entitled to rely upon any order or decree
entered by any court of competent jurisdiction in which such insolvency,
bankruptcy, receivership, liquidation, reorganization, dissolution, winding-up
or similar case or proceeding is pending, or a certificate of the trustee in
bankruptcy, receiver, liquidating trustee, custodian, assignee for the benefit
of creditors, agent or other Person making such payment or distribution,
delivered to the Trustee or to the Holders, for the purpose of ascertaining the
Persons entitled to participate in such payment or distribution, the holders of
Indebtedness under the Senior Credit Facility and other Indebtedness of any
Issuer, the amount thereof or payable thereon, the amount or amounts paid or
distributed thereon and all other facts pertinent

 
                                     -142-

thereto or to this Article 11; provided that the foregoing shall apply only if
                               -------- 
such court has been fully apprised of the provisions of this Article 11.

Section 11.11. Rights of Trustee as a Holder of Indebtedness under the Senior
               Credit Facility; Preservation of Trustee's Rights.
               -------------------------------------------------

          The Trustee in its individual capacity shall be entitled to all the
rights set forth in this Article 11 with respect to any Indebtedness under the
Senior Credit Facility which may at any time be held by it, to the same extent
as any other holder of Indebtedness under the Senior Credit Facility, and
nothing in this Indenture shall deprive the Trustee of any of its rights as such
holder. Nothing in this Article 11 shall apply to claims of, or payments to, the
Trustee under or pursuant to Section 7.07 hereof.

Section 11.12. Article Applicable to Paying Agents.
               ----------------------------------- 

          In case at any time any Paying Agent other than the Trustee shall have
been appointed by the Issuers and be then acting hereunder, the term "Trustee"
as used in this Article 11 shall in such case (unless the context otherwise
requires) be construed as extending to and including such Paying Agent within
its meaning as fully for all intents and purposes as if such Paying Agent were
named in this Article 11 in addition to or in place of the Trustee.

Section 11.13. No Suspension of Remedies.
               ------------------------- 

          Nothing contained in this Article 11 shall limit the right of the
Trustee or the Holders to take any action to accelerate the maturity of the
Notes pursuant to Article 6 or to pursue any rights or remedies hereunder or
under applicable law, subject to the rights, if any, under this Article 11 of
the holders, from time to time, of Indebtedness under the Senior Credit
Facility.

 
                                     -143-

                                  ARTICLE 12

                                 MISCELLANEOUS

Section 12.01. Trust Indenture Act Controls.
               ---------------------------- 

          If any provision of this Indenture limits, qualifies or conflicts with
another provision which is required to be included in this Indenture by the TIA,
the required provision shall control.

Section 12.02. Notices.
               ------- 

          Any notices or other communications required or permitted hereunder
shall be in writing, and shall be sufficiently given if made by hand delivery,
by telex, by telecopier or registered or certified mail, postage prepaid, return
receipt requested, addressed as follows:

          If to the Issuers or any Guarantor:

               c/o Muzak Holdings LLC
               2901 Third Avenue
               Suite 400
               Seattle, Washington  98121
               Attention:  Brad Bodenman
               Tel:  (206) 633-3000
               Fax:  (206) 633-6210

          Copy to:

               Kirkland & Ellis
               200 East Randolph Drive
               Chicago, Illinois  60601
               Attention:  Laurie Gunther, Esq.
               Tel:  (312) 861-2000
               Fax:  (312) 861-2200

 
                                     -144-

          Copy to:

               ABRY Partners, Inc.
               18 Newbury Street
               Boston, Massachusetts  02116
               Attention:  Peni Garber
               Tel:  (617) 859-2959
               Fax:  (617) 859-8797

          If to the Trustee:

               State Street Bank and Trust Company
               225 Franklin Street
               Boston, Massachusetts  02110
               Attention:  Corporate Trust Department
                           /Ref: Muzak 13% Senior Discount   Notes due 2010
               Fax:  (617) 664-5150

          The Issuers, any Guarantor or the Trustee by written notice to the
others may designate additional or different addresses for subsequent notices or
communications. Any notice or communication to the Issuers, any Guarantor and
the Trustee, shall be deemed to have been given or made as of the date so
delivered if personally delivered; when answered back, if telexed; when receipt
is acknowledged, if telecopied; and five (5) calendar days after mailing if sent
by registered or certified mail, postage prepaid (except that a notice of change
of address shall not be deemed to have been given until actually received by the
addressee).

          Any notice or communication mailed to a Noteholder shall be mailed to
him by first-class mail, postage prepaid, at his address shown on the register
kept by the Registrar.

          Failure to mail a notice or communication to a Noteholder or any
defect in it shall not affect its sufficiency with respect to other Noteholders.
If a notice or communication to a Noteholder is mailed in the manner provided
above, it shall be deemed duly given, whether or not the addressee receives it.

 
                                     -145-

          In case by reason of the suspension of regular mail service, or by
reason of any other cause, it shall be impossible to mail any notice as required
by this Indenture, then such method of notification as shall be made with the
approval of the Trustee shall constitute a sufficient mailing of such notice.

Section 12.03. Communications by Holders with Other Holders.
               --------------------------------------------

          Noteholders may communicate pursuant to TIA Section 312(b) with other
Noteholders with respect to their rights under this Indenture or the Notes. The
Issuers, the Guarantors (if any), the Trustee, the Registrar and anyone else
shall have the protection of TIA Section 312(c).

Section 12.04. Certificate and Opinion as to Conditions Precedent.
               --------------------------------------------------

          Upon any request or application by the Issuers or any Guarantor to the
Trustee to take any action under this Indenture, the Issuers or such Guarantor,
as the case may be, shall furnish to the Trustee if and to the extent reasonably
requested by the Trustee:

          (1)  an Officers' Certificate (which shall include the statements set
     forth in Section 11.05 below) stating that, in the opinion of the signers,
     all conditions precedent, if any, provided for in this Indenture relating
     to the proposed action have been complied with; and

          (2)  an Opinion of Counsel (which shall include the statements set
     forth in Section 11.05 below) stating that, in the opinion of such counsel,
     all such conditions precedent have been complied with.

 
                                     -146-

Section 12.05. Statements Required in Certificate and Opinion.
               ----------------------------------------------

          Each certificate and opinion with respect to compliance with a
condition or covenant provided for in this Indenture shall include:

          (1)  a statement that the Person making such certificate or opinion
     has read such covenant or condition;

          (2)  a brief statement as to the nature and scope of the examination
     or investigation upon which the statements or opinions contained in such
     certificate or opinion are based;

          (3)  a statement that, in the opinion of such Person, it or he has
     made such examination or investigation as is necessary to enable it or him
     to express an informed opinion as to whether or not such covenant or
     condition has been complied with; and

          (4)  a statement as to whether or not, in the opinion of such Person,
     such covenant or condition has been complied with.

Section 12.06. When Treasury Notes Disregarded.
               ------------------------------- 

          In determining whether the Holders of the required aggregate principal
amount of Notes have concurred in any direction, waiver or consent, Notes owned
by the Issuers, any Guarantor or any other obligor on the Notes or by any
Affiliate of any of them shall be disregarded, except that for the purposes of
determining whether the Trustee shall be protected in relying on any such
direction, waiver or consent, only Notes which the Trustee actually knows are so
owned shall be so disregarded. Notes so owned which have been pledged in good
faith shall not be disregarded if the pledgee establishes to the satisfaction of
the Trustee the pledgee's right so to act with respect to the Notes and that the
pledgee is not an Issuer, any Guarantor or any other obligor upon the Notes or
any Affiliate of any of them.

 
                                     -147-

Section 12.07. Rules by Trustee and Agents.
               --------------------------- 

          The Trustee may make reasonable rules for action by or at meetings of
Noteholders. The Registrar and Paying Agent may make reasonable rules for their
functions.

Section 12.08. Business Days; Legal Holidays.
               ----------------------------- 

          A "Business Day" is a day that is not a Legal Holiday. A "Legal
Holiday" is a Saturday, a Sunday, a federally-recognized holiday or a day on
which banking institutions are not required to be open in the State of New York.
If a payment date is a Legal Holiday at a place of payment, payment may be made
at that place on the next succeeding day that is not a Legal Holiday, and no
interest shall accrue for the intervening period.

Section 12.09. Governing Law.
               ------------- 

          THIS INDENTURE AND THE NOTES SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, AS APPLIED TO CONTRACTS MADE
AND PERFORMED WITHIN THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF
CONFLICTS OF LAW. EACH OF THE PARTIES HERETO AGREES TO SUBMIT TO THE
JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK IN ANY ACTION OR PROCEEDING
ARISING OUT OF OR RELATING TO THIS INDENTURE OR THE NOTES.

Section 12.10. No Adverse Interpretation of Other Agreements.
               --------------------------------------------- 

          This Indenture may not be used to interpret another indenture, loan,
security or debt agreement of any Issuer or any Subsidiary thereof. No such
indenture, loan, security or debt agreement may be used to interpret this
Indenture.

Section 12.11. No Recourse Against Others.
               -------------------------- 

          A director, officer, employee, stockholder or incorporator, as such,
of any Issuer or any Guarantor shall not have any liability for any obligations
of any Issuer or any Guarantor under the Notes, the Guarantees (if any) or this
Indenture or for any claim based on, in respect of or by reason of such

 
                                     -148-

obligations or their creations. Each Noteholder by accepting a Note waives and
releases all such liability. Such waiver and release are part of the
consideration for the issuance of the Notes.

Section 12.12. Successors.
               ---------- 

          All agreements of each of the Issuers and each Guarantor (if any) in
this Indenture and the Notes shall bind their respective successors. All
agreements of the Trustee, any additional trustee and any Paying Agents in this
Indenture shall bind its successor.

Section 12.13. Multiple Counterparts.
               --------------------- 

          The parties may sign multiple counterparts of this Indenture. Each
signed counterpart shall be deemed an original, but all of them together
represent one and the same agreement.

Section 12.14. Table of Contents, Headings, etc.
               -------------------------------- 

          The table of contents, cross-reference sheet and headings of the
Articles and Sections of this Indenture have been inserted for convenience of
reference only, are not to be considered a part hereof, and shall in no way
modify or restrict any of the terms or provisions hereof.

Section 12.15. Separability.
               ------------ 

          Each provision of this Indenture shall be considered separable and if
for any reason any provision which is not essential to the effectuation of the
basic purpose of this Indenture or the Notes shall be invalid, illegal or
unenforceable, the validity, legality and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby.

 
                                     -149-

          IN WITNESS WHEREOF, the parties have caused this Indenture to be duly
executed all as of the date and year first written above.

                              MUZAK HOLDINGS LLC

                              By:  /s/ Peni Garber
                                   ---------------------------------------------
                                   Name:  Peni Garber
                                   Title: 

                              MUZAK HOLDINGS FINANCE CORP.

                              By:  /s/ Peni Garber
                                   ---------------------------------------------
                                   Name:  Peni Garber
                                   Title:

 
                                     -150-

                              Trustee:

                              STATE STREET BANK AND TRUST COMPANY, as Trustee

                              By:  /s/ Carolina D. Altomare
                                   ---------------------------------------------
                                   Name:  Carolina D. Altomare
                                   Title: Assistant Vice President

 
                                                                       EXHIBIT A
                                                                       ---------
                                                                  (FACE OF NOTE)

                                [FORM OF NOTE]
                                --------------

          THIS NOTE HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR
SOLD WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S.
PERSONS, EXCEPT AS SET FORTH BELOW. BY ITS ACQUISITION HEREOF, THE HOLDER AGREES
THAT (1) IT WILL NOT PRIOR TO THE DATE (THE "RESALE RESTRICTION TERMINATION
DATE") THAT IS TWO YEARS AFTER THE LATER OF THE ORIGINAL ISSUANCE OF THIS NOTE
AND THE LAST DATE ON WHICH ANY ISSUER, OR ANY AFFILIATE OF ANY ISSUER, WAS THE
OWNER OF THIS NOTE (OR ANY PREDECESSOR OF THIS NOTE), RESELL OR OTHERWISE
TRANSFER THIS NOTE EXCEPT (A) TO ANY ISSUER OR ANY SUBSIDIARY THEREOF, (B)
INSIDE THE UNITED STATES TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH
RULE 144A UNDER THE SECURITIES ACT, (C) INSIDE THE UNITED STATES TO AN
INSTITUTIONAL ACCREDITED INVESTOR WITHIN THE MEANING OF SUBPARAGRAPH (a)(1),
(2), (3) OR (7) OF RULE 501 UNDER THE SECURITIES ACT THAT, PRIOR TO SUCH
TRANSFER, FURNISHES (OR HAS FURNISHED ON ITS BEHALF BY A U.S. BROKER-DEALER) TO
THE TRUSTEE A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS
RELATING TO THE RESTRICTIONS ON TRANSFER OF THIS NOTE (THE FORM OF WHICH LETTER
CAN BE OBTAINED FROM THE TRUSTEE), (D) OUTSIDE THE UNITED STATES IN AN OFFSHORE
TRANSACTION IN COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT, (E) PURSUANT
TO ANY OTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE
SECURITIES ACT OR (F) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE
SECURITIES ACT AND (2) WILL GIVE TO EACH PERSON TO WHOM THIS NOTE IS TRANSFERRED
A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY
TRANSFER OF THIS NOTE PRIOR TO THE RESALE RESTRICTION TERMINATION DATE, IF THE
PROPOSED TRANSFER IS BEING MADE PURSUANT TO CLAUSE (C) OR (E) ABOVE, PRIOR TO
SUCH TRANSFER, THE HOLDER WILL BE REQUIRED TO FURNISH TO THE TRUSTEE AND THE
ISSUERS SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS ANY OF THEM
MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO
AN EXEMPTION FROM OR IN A TRANSACTION NOT SUBJECT

                                      A-1

 
TO THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. AS USED HEREIN, THE
TERMS "OFFSHORE TRANSACTION," "UNITED STATES" AND "U.S. PERSON" HAVE THE
MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT. THIS LEGEND
WILL BE REMOVED UPON THE REQUEST OF THE HOLDER AFTER THE RESALE RESTRICTION
TERMINATION DATE.

                                      A-2

 
     THIS NOTE IS ISSUED WITH ORIGINAL ISSUE DISCOUNT FOR PURPOSES OF SECTION
     1271 ET SEQ. OF THE INTERNAL REVENUE CODE. FOR EACH $1,000 PRINCIPAL AMOUNT
     AT MATURITY OF THIS NOTE, THE ISSUE PRICE IS $533.285. THE ISSUE DATE OF
     THIS NOTE IS MARCH 18, 1999 AND THE YIELD TO MATURITY IS 13%.

                                                                           CUSIP

No.                                                                        $

                              MUZAK HOLDINGS LLC

                         MUZAK HOLDINGS FINANCE CORP.

                      13% Senior Discount Notes due 2010

          Muzak Holdings LLC, a Delaware limited liability company and Muzak
Holdings Finance Corp., a Delaware corporation (collectively, the "Issuers",
which term includes any successor entities), for value received promise to pay
to ________________________ or registered assigns the principal sum of
___________________ Dollars, on March 15, 2010.

          Interest Payment Dates: March 15 and September 15 commencing September
15, 2004.

          Record Dates: March 1 and September 1

          Reference is made to the further provisions of this Note contained
herein, which will for all purposes have the same effect as if set forth at this
place.

                                      A-3

 
          IN WITNESS WHEREOF, the Issuers have caused this Note to be signed
manually or by facsimile by their duly authorized officers.

                              MUZAK HOLDINGS LLC

                              By: ______________________________________________
                                  Name:
                                  Title:

                              By: ______________________________________________
                                  Name:
                                  Title:

                              MUZAK HOLDINGS FINANCE CORP.

                              By: ______________________________________________
                                  Name:
                                  Title:

                              By:
                                  Name:
                                  Title:

Certificate of Authentication:

This is one of the 13% Senior Discount Notes due 2010 referred to in the within-
mentioned Indenture

Dated:

STATE STREET BANK AND TRUST COMPANY,

as Trustee

By:  ______________________________

                                      A-4

 
     Authorized Signatory

                                      A-5

 
                                                                  (REVERSE SIDE)

                              MUZAK HOLDINGS LLC

                         MUZAK HOLDINGS FINANCE CORP.

                      13% Senior Discount Notes due 2010

1.   INTEREST.

          Muzak Holdings LLC, a Delaware limited liability company (the
"Company") and Muzak Holdings Finance Corp., a Delaware corporation ("Finance
Corp." and together with the Company, the "Issuers"), promise to pay cash
interest on the principal amount of this Note semiannually on March 15 and
September 15 of each year (each an "Interest Payment Date"), commencing on
September 15, 2004, at the rate of 13% per annum. Cash interest will be
                                       --- -----                        
computed on the basis of a 360-day year of twelve 30-day months. Cash interest
on the Notes will accrue from the most recent date to which interest has been
paid or, if no interest has been paid, from March 15, 2004.

          The Issuers shall pay cash interest on overdue principal, and on
overdue premium, if any, and overdue interest, to the extent lawful, at the rate
of interest borne by the Notes.

2.   METHOD OF PAYMENT.

          The Issuers will pay interest on this Note provided for in Paragraph 1
above (except defaulted interest) to the person who is the registered Holder of
this Note at the close of business on the March 1 or September 1 preceding the
Interest Payment Date (whether or not such day is a Business Day). The Holder
must surrender this Note to a Paying Agent to collect principal payments. The
Issuers will pay Accreted Value or principal, premium, if any, and interest in
money of the United States that at the time of payment is legal tender for
payment of public and private debts; provided, however, that the Issuers may pay
                                     --------  -------                          
Accreted Value or principal, premium, if any, and interest by check payable in
such money. The Issuers may mail an interest check to the Holder's registered
address.

                                      A-6

 
3.   PAYING AGENT AND REGISTRAR.

          Initially, State Street Bank and Trust Company, a Massachusetts
banking corporation (the "Trustee"), will act as Paying Agent and Registrar. The
Issuers may change any Paying Agent or Registrar without notice to the Holders.
Neither the Issuers nor any of its Subsidiaries or Affiliates may act as Paying
Agent but may act as Registrar or co-Registrar.

4.   INDENTURE; RESTRICTIVE COVENANTS.

          The Issuers issued this Note under an Indenture dated as of March 18,
1999 (the "Indenture") among the Issuers and the Trustee. The terms of this Note
include those stated in the Indenture and those made part of the Indenture by
reference to the Trust Indenture Act of 1939 (15 U.S. Code Sections 77aaa-
77bbbb) as in effect on the date of the Indenture. This Note is subject to all
such terms, and the Holder of this Note is referred to the Indenture and said
Trust Indenture Act for a statement of them. All capitalized terms in this Note,
unless otherwise defined, have the meanings assigned to them by the Indenture.

          The Notes are general unsecured obligations of the Issuers limited to
$75,000,000 aggregate principal amount at maturity. The Indenture imposes
certain restrictions on, among other things, the incurrence of indebtedness, the
incurrence of liens, the making of certain investments, mergers and sale of
assets, the payments of dividends on or the repurchase of, capital stock of the
Issuers, certain other restricted payments by the Issuers and their
Subsidiaries, certain transactions with, and investments in, their Affiliates,
the issuance of capital stock by Subsidiaries, the types of businesses which the
Issuers and their Subsidiaries may engage in, the creation of dividend and other
payment restrictions affecting Subsidiaries, certain sale-leaseback transactions
and a provision regarding change-of-control transactions.

5.   REDEMPTION.

          (a)  The Issuers may redeem the Notes that are redeemable at their
option, in whole at any time or in part from

                                      A-7

 
time to time on or after March 15, 2004 at the redemption prices (expressed as
percentages of the principal amount at maturity thereof), set forth below plus
accrued and unpaid interest, if any, to the Redemption Date, if redeemed during
the twelve-month period beginning on March 15 of each year indicated below:



     Year                               Percentage
     ----                               ----------
                                     
     2004........................       106.500%        
     2005........................       104.333%        
     2006........................       102.167%        
     2007 and thereafter.........       100.000%         


          (b)  The Issuers may redeem up to 35% of the aggregate principal
amount at maturity of the Notes originally issued under the Indenture, at any
time and from time to time prior to March 15, 2002, at a redemption price equal
to 113.0% of the Accreted Value thereof, plus accrued and unpaid interest, if
any, to the Redemption Date out of the net cash proceeds of one or more Equity
Offerings; provided, that at least 65% of the aggregate principal amount at
           --------                                                        
maturity of the Notes originally issued under the Indenture remains outstanding
immediately after any such redemption (it being expressly agreed that for
purposes of determining whether this condition is satisfied, Notes owned by the
Issuers or any of its Affiliates shall be deemed not to be outstanding). In
order to effect the foregoing redemption with the proceeds of any Equity
Offering, the Issuers shall make such redemption not more than 60 days following
the closing of any such Equity Offering.

6.   NOTICE OF REDEMPTION.

          Notice of redemption will be mailed via first class mail at least 30
days but not more than 60 days prior to the Redemption Date to each Holder to be
redeemed at its registered address as it shall appear on the register of the
Notes maintained by the Registrar. On and after any Redemption Date, interest
will cease to accrue on the Notes or portions thereof called for redemption
unless the Issuers shall fail to redeem any such Note.

                                      A-8

 
7.   SUBORDINATION.

          Each Holder, by accepting the Note or Notes issued to it, covenants
and agrees that, prior to the payment in full in cash of all outstanding amounts
under the Senior Credit Facility, neither it nor the Trustee shall (a) institute
against, or join any other Person in instituting against or intervene with
respect to Muzak LLC, any involuntary bankruptcy, reorganization, arrangement,
insolvency or liquidation case under the laws of the United States or any state
of the United States or (b) in any voluntary or involuntary bankruptcy case of
any Issuer, seek a substantive consolidation of the estate of such Issuer with
the estates of Muzak LLC and/or Muzak Finance. In addition, and without
limitation of any other rights or remedies of any holder of Indebtedness under
the Senior Credit Facility, upon any substantive consolidation of the estate of
any Issuer with the estates of Muzak LLC and/or Muzak Finance in any bankruptcy,
reorganization, receivership or similar case relating to such Issuer or its
property, the Issuers agree under the Notes, the Registration Rights Agreement
and the Indenture, and each Holder by accepting a Note agrees, that the
Indebtedness evidenced by the Notes and all Obligations under the Notes, the
Registration Rights Agreement and the Indenture with respect thereto, including
recission claims, are subordinated in right of payment, to the extent and in the
manner provided for in Article 11 of the Indenture, to the prior payment in full
in cash of all Indebtedness under the Senior Credit Facility (whether
outstanding on the date hereof or hereafter created, incurred, assumed or
guaranteed), and that the subordination is for the benefit of the holders of the
Indebtedness under the Senior Credit Facility.

8.   OFFERS TO PURCHASE.

          The Indenture requires that certain proceeds from Asset Sales be used,
subject to further limitations contained therein, to make an offer to purchase
certain amounts of Notes in accordance with the procedures set forth in the
Indenture. The Issuers are also required to make an offer to purchase Notes upon
occurrence of a Change of Control in accordance with procedures set forth in the
Indenture.

                                      A-9

 
9.   REGISTRATION RIGHTS.

          Pursuant to the Registration Rights Agreement among the Issuers and
CIBC Oppenheimer Corp. and Goldman, Sachs & Co., as initial purchasers of the
Notes, the Issuers will be obligated to consummate an exchange offer pursuant to
which the Holder of this Note shall have the right to exchange this Note for
Notes of a separate series issued under the Indenture (or a trust indenture
substantially identical to the Indenture in accordance with the terms of the
Registration Rights Agreement) which have been registered under the Securities
Act, in like principal amount and having substantially identical terms as the
Notes. The Holders shall be entitled to receive certain additional interest
payments in the event such exchange offer is not consummated and upon certain
other conditions, all pursuant to and in accordance with the terms of the
Registration Rights Agreement.

10.  DENOMINATIONS, TRANSFER, EXCHANGE.

          The Notes are in registered form without coupons in denominations of
$1,000 principal amount at maturity and integral multiples thereof. A Holder may
register the transfer or exchange of Notes in accordance with the Indenture. The
Registrar may require a Holder, among other things, to furnish appropriate
endorsements and transfer documents and to pay any taxes and fees required by
law or permitted by the Indenture. The Registrar need not register the transfer
of or exchange any Note selected for redemption or register the transfer of or
exchange any Note for a period of 15 days before a selection of Notes to be
redeemed or any Note after it is called for redemption in whole or in part,
except the unredeemed portion of any Note being redeemed in part.

11.  PERSONS DEEMED OWNERS.

          The registered Holder of this Note may be treated as the owner of it
for all purposes.

                                      A-10

 
12.  UNCLAIMED MONEY.

          If money for the payment of Accreted Value or principal, premium or
interest on any Note remains unclaimed for two years, the Trustee or Paying
Agent will pay the money back to the Issuers at its request. After that, Holders
entitled to money must look to the Issuers for payment as general creditors
unless an "abandoned property" law designates another person.

13.  AMENDMENT, SUPPLEMENT AND WAIVER.

          Subject to certain exceptions, the Indenture or the Notes may be
modified, amended or supplemented by the Issuers, the Guarantors and the Trustee
with the consent of the Holders of at least a majority in aggregate principal
amount at maturity of the Notes then outstanding and any existing Default or
compliance with any provision may be waived in a particular instance with the
consent of the Holders of a majority in aggregate principal amount at maturity
of the Notes then outstanding. Without the consent of Holders, the Issuers, and
the Trustee may amend the Indenture or the Notes or supplement the Indenture for
certain specified purposes including providing for uncertificated Notes in
addition to certificated Notes, and curing any ambiguity, defect or
inconsistency, or making any other change that does not materially and adversely
affect the rights of any Holder.

14.  SUCCESSOR ENTITY.

          When a successor entity assumes all the obligations of its predecessor
under the Notes and the Indenture and immediately before and thereafter no
Default exists and certain other conditions are satisfied, the predecessor
entity will be released from those obligations.

15.  DEFAULTS AND REMEDIES.

          Events of Default are set forth in the Indenture. If an Event of
Default (other than an Event of Default pursuant to Section 6.01(g) or (h) of
the Indenture with respect to the Company) occurs and is continuing, the Trustee
by notice to the Company, or the Holders of not less than 25% in aggregate
prin-

                                      A-11

 
cipal amount at maturity of the Notes then outstanding, may declare to be
immediately due and payable the entire principal amount of all the Notes then
outstanding plus accrued but unpaid interest to the date of acceleration;
provided, however, that after such acceleration but before judgment or decree
- --------  -------                                                            
based on such acceleration is obtained by the Trustee, the Holders of a majority
in aggregate principal amount at maturity of the outstanding Notes may, under
certain circumstances, rescind and annul such acceleration and its consequences
if all existing Events of Default, other than the nonpayment of principal,
premium or interest that has become due solely because of the acceleration, have
been cured or waived and if the rescission would not conflict with any judgment
or decree. No such rescission shall affect any subsequent Default or impair any
right consequent thereto. In case an Event of Default specified in Section
6.01(g) or (h) of the Indenture occurs, such principal amount, together with
premium, if any, and interest with respect to all of the Notes, shall be due and
payable immediately without any declaration or other act on the part of the
Trustee or the Holders of the Notes.

16.  TRUSTEE DEALINGS WITH THE ISSUERS.

          The Trustee under the Indenture, in its individual or any other
capacity, may make loans to, accept deposits from, and perform services for the
Issuers, and may otherwise deal with the Issuers, as if it were not Trustee.

17.  NO RECOURSE AGAINST OTHERS.

          As more fully described in the Indenture, a director, officer,
employee or stockholder, as such, of the Issuers or any Guarantor shall not have
any liability for any obligations of the Issuers or the Guarantors (if any)
under the Notes, the Guarantees (if any) or the Indenture or for any claim based
on, in respect or by reason of, such obligations or their creation. The Holder
of this Note by accepting this Note waives and releases all such liability. The
waiver and release are part of the consideration for the issuance of this Note.

                                      A-12

 
18.  DEFEASANCE AND COVENANT DEFEASANCE.

          The Indenture contains provisions for defeasance of the entire
indebtedness on this Note and for defeasance of certain covenants in the
Indenture upon compliance by the Issuers with certain conditions set forth in
the Indenture.

19.  ABBREVIATIONS.

          Customary abbreviations may be used in the name of a Holder or an
assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the
entireties), JT TEN (joint tenants with right of survivorship and not as tenants
in common), CUST (= Custodian), and U/G/M/A (Uniform Gifts to Minors Act).

20.  CUSIP NUMBERS.

          Pursuant to a recommendation promulgated by the Committee on Uniform
Securities Identification Procedures, the Issuers have caused CUSIP Numbers to
be printed on the Notes and have directed the Trustee to use CUSIP numbers in
notices of redemption as a convenience to Holders of the Notes. No
representation is made as to the accuracy of such numbers either as printed on
the Notes or as contained in any notice of redemption and reliance may be placed
only on the other identification numbers placed thereon.

21.  GOVERNING LAW.

          THE INDENTURE AND THIS NOTE SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, AS APPLIED TO CONTRACTS MADE
AND PERFORMED WITHIN THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF
CONFLICTS OF LAW. EACH OF THE PARTIES TO THE INDENTURE HAS AGREED TO SUBMIT TO
THE JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK IN ANY ACTION OR
PROCEEDING ARISING OUT OF OR RELATING TO THE INDENTURE OR THIS NOTE.

          THE ISSUERS WILL FURNISH TO ANY HOLDER OF A NOTE UPON WRITTEN REQUEST
AND WITHOUT CHARGE A COPY OF THE INDENTURE. REQUESTS MAY BE MADE TO: MUZAK
HOLDINGS LLC, 2901 Third Ave-

                                      A-13

 
nue, Suite 400, Seattle, Washington 98121, Attention: Brad Bo-
denman.

                                      A-14

 
                                  ASSIGNMENT
                                  ----------


I or we assign and transfer this Note to:

             (Insert assignee's social security or tax I.D. number)

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________
(Print or type name, address and zip code of assignee)

and irrevocably appoint:

__________________________________________________________________________

__________________________________________________________________________

Agent to transfer this Note on the books of the Issuers.  The Agent may
substitute another to act for him.

                                      A-15

 
Date:____________________          Your Signature:__________________

                              
                                   _________________________________
                                   (Sign exactly as your name
                                   appears on the other side of
                                   this Note)

     Signature Guarantee:          _________________________________

                                      A-16

 
                      OPTION OF HOLDER TO ELECT PURCHASE
                      ----------------------------------

          If you want to elect to have all or any part of this Note purchased by
the Issuers pursuant to Section 4.09 or Section 4.16 of the Indenture, check the
appropriate box:

[_]   Section 4.09                                [_]  Section 4.16


          If you want to have only part of the Note purchased by the Issuers
pursuant to Section 4.09 or Section 4.16 of the Indenture, state the amount you
elect to have purchased:

$__________________

Date:  ____________

              
                                    Your Signature:  _____________________

                                    (Sign exactly as your name appears on the
                                    face of this Note)

___________________________
Signature Guaranteed

                                    

                                      A-17

 
                                                                       EXHIBIT B
                                                                       ---------

                        FORM OF LEGEND FOR GLOBAL NOTES


          Any Global Note authenticated and delivered hereunder shall bear a
legend (which would be in addition to any other legends required in the case of
a Restricted Security) in substantially the following form:

          THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE
     HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR A
     NOMINEE OF A DEPOSITORY.  THIS NOTE IS NOT EXCHANGEABLE FOR NOTES
     REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITORY OR ITS NOMINEE
     EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO
     TRANSFER OF THIS NOTE (OTHER THAN A TRANSFER OF THIS NOTE AS A WHOLE BY THE
     DEPOSITORY TO A NOMINEE OF THE DEPOSITORY OR BY A NOMINEE OF THE DEPOSITORY
     TO THE DEPOSITORY OR ANOTHER NOMINEE OF THE DEPOSITORY) MAY BE REGISTERED
     EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

          UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
     OF THE DEPOSITORY TRUST COMPANY (A NEW YORK CORPORATION) ("DTC") TO THE
     ISSUERS OR THEIR AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT,
     AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN
     SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND
     ANY PAYMENT IS MADE TO CEDE & CO. OR SUCH OTHER ENTITY AS IS REQUESTED BY
     AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE
     HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS
     THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                                      B-1

 
                                                                       EXHIBIT C
                                                                       ---------

                    CERTIFICATE TO BE DELIVERED UPON EXCHANGE
                      OR REGISTRATION OF TRANSFER OF NOTES 
                    ------------------------------------------

                      Re:      13% Senior Discount Notes
                               due 2010 (the "Notes"), of
                               Muzak Holdings LLC and
                               Muzak Holdings Finance Corp.


                  This Certificate relates to $_______ principal amount at
maturity of Notes held in the form of* ___ a beneficial interest in a Global
Note or* _______ Certificated Notes by ______ (the "Transferor").

The Transferor:*

         [_]      has requested by written order that the Registrar deliver in
exchange for its beneficial interest in the Global Note held by the Depository a
Certificated Note or Certificated Notes in definitive, registered form of
authorized denominations and an aggregate number equal to its beneficial
interest in such Global Note (or the portion thereof indicated above); or

         [_]      has requested that the Registrar by written order to exchange
or register the transfer of a Certificated Note or Certificated Notes.

                  In connection with such request and in respect of each such
Note, the Transferor does hereby certify that the Transferor is familiar with
the Indenture relating to the above captioned Notes and the restrictions on
transfers thereof as provided in Section 2.06 of such Indenture, and that the
transfer of this Note does not require registration under the Securities Act of
1933, as amended (the "Securities Act"), because*:

         [_]      Such Note is being acquired for the Transferor's own account,
without transfer (in satisfaction of Section 2.06 of the Indenture).


                                      C-1

 
         [_]      Such Note is being transferred to a Qualified Institutional
Buyer (as defined in Rule 144A under the Securities Act), in reliance on Rule
144A.

         [_]      Such Note is being transferred in reliance on Regulation S
under the Securities Act and a Transferor Certificate substantially in the form
of Exhibit D-1 to the Indenture accompanies this Certificate.F
   -----------
         [_]      Such Note is being transferred in reliance on Rule 144 under
the Securities Act.

         [_]      Such Note is being transferred in reliance on and in
compliance with an exemption from the registration requirements of the
Securities Act other than Rule 144A or Rule 144 or Regulation S under the
Securities Act to a person other than an institutional "accredited investor." An
opinion of counsel to the effect that such transfer does not require
registration under the Securities Act accompanies this Certificate.

         [_]      Such Note is being transferred to an institutional "accredited
investor" (as defined in Rule 501(a)(1), (2), (3) and (7) under the Securities
Act), who has such knowledge and experience in financial and business matters as
to be capable of evaluating the merits and risks of its investment in the Notes,
and it and any accounts for which it is acting are each able to bear the
economic risk of their investment. An opinion of counsel to the effect that such
transfer does not require registration under the Securities Act and a Transferee
Certificate substantially in the form of Exhibit D-2 to the Indenture
                                         -----------
accompanies this Certificate.



                                                 -------------------------------
                                                     [INSERT NAME OF TRANSFEROR]



                                                     By: _______________________
                                                         [Authorized Signatory]

Date: ________________________                                            
      *Check applicable box.


                                      C-2

 
                                                                     EXHIBIT D-1
                                                                     -----------

                           Form of Certificate to Be
                            Delivered in Connection
                          with Regulation S Transfers
                          ---------------------------

                 Re:   13% Senior Discount Notes due 2010 (the
                       "Notes") of Muzak Holdings LLC (the
                       "Company") and Muzak Holdings Finance
                       Corp. (together with the Company, the
                       "Issuers")
                       ----------------------------------------

Ladies and Gentlemen:

          In connection with our proposed sale of $____________ aggregate
principal amount at maturity of the Notes, we confirm that such sale has been
effected pursuant to and in accordance with Regulation S under the Securities
Act of 1933, as amended (the "Securities Act"), and, accordingly, we represent
that:

          (1)  the offer of the Notes was not made to a person in the United
     States;

          (2)  either (a) at the time the buy offer was originated, the
     transferee was outside the United States or we and any person acting on our
     behalf reasonably believed that the transferee was outside the United
     States, or (b) the transaction was executed in, on or through the
     facilities of a designated offshore securities market and neither we nor
     any person acting on our behalf knows that the transaction has been
     prearranged with a buyer in the United States;

          (3)  no directed selling efforts have been made in the United States
     in contravention of the requirements of Rule 903(b) or Rule 904(b) of
     Regulation S, as applicable;

          (4)  the transaction is not part of a plan or scheme to evade the
     registration requirements of the Securities Act; and


                                     D-1-1

 
          (5)  we have advised the transferee of the transfer restrictions
     applicable to the Notes.

          You and the Issuers are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby.  Defined terms used herein without
definition have the respective meanings provided in Regulation S.

                                   Very truly yours,

                                   [Name of Transferor]


                                   By:  ___________________________________
                                   [Authorized Signatory]

                                   
                                     D-1-2

 
                                                                     EXHIBIT D-2
                                                                     -----------

                   Accredited Investor Transferee Certificate
                   ------------------------------------------

Muzak Holdings LLC
Muzak Holdings Finance Corp.

State Street Bank and Trust Company
c/o  State Street Bank and Trust Company
225 Franklin Street
Boston, Massachusetts  02110
Attention: Corporate Trust Department

Ladies and Gentlemen:

          In connection with our proposed purchase of $          aggregate
principal amount at maturity of the 13% Senior Discount Notes due 2010 (the
"Notes") of Muzak Holdings LLC (the "Company") and Muzak Holdings Finance Corp.
(together with the Company, the "Issuers"), we confirm that:

          1.  We understand that none of the Notes has been registered under the
     Securities Act of 1933, as amended (the "Securities Act"), and, unless so
     registered, may not be sold except as permitted in the following sentence.
     We agree on our own behalf and on behalf of any investor account for which
     we are purchasing any Notes to offer, sell or otherwise transfer any such
     Notes prior to the date the "Resale Restriction Termination Date") that is
     two years after the later of the original issuance of this Note and the
     last date on which any Issuer, or any Affiliate of any Issuer, was the
     owner of this Note (or any predecessor of this Note) except (A) to any
     Issuer or any subsidiary thereof, (B) inside the United States to a
     Qualified Institutional Buyer in compliance with Rule 144A under the
     Securities Act, (C) inside the United States to an Institutional Accredited
     Investor within the meaning of subparagraph (a)(1),(2),(3) or (7) of Rule
     501 under the Securities Act that, prior to such transfer, furnishes (or
     has furnished on its behalf by a U.S. broker-dealer) to the Trustee a
     signed letter substantially in the form of 

                                     D-2-1

 
     this letter, (D) outside the United States in an offshore transaction in
     compliance with Rule 904 under the Securities Act, (E) pursuant to any
     other available exemption from the registration requirements of the
     Securities Act or (F) pursuant to an effective Registration Statement under
     the Securities Act. Each purchaser acknowledges that the Issuers and the
     Trustee reserve the right prior to any offer, sale or other transfer prior
     to the Resale Restriction Termination Date of the applicable Notes pursuant
     to clause (c) or (e) above to require the delivery of an opinion of
     counsel, certification and/or other information satisfactory to the Issuers
     and the Trustee.

          2.  We are an Institutional Accredited Investor purchasing such Notes
     for our own account or for the account of one or more Institutional
     Accredited Investors, and we are acquiring such Notes for investment
     purposes and not with a view to, or for offer or sale in connection with,
     any distribution in violation of the Securities Act or the securities laws
     of any state of the United States and we have such knowledge and experience
     in financial and business matters as to be capable of evaluating the merits
     and risks of our investment in such Notes, and we and any accounts for
     which we are acting are each able to bear the economic risk of our or its
     investment in such Notes for an indefinite period.

          3.  We acknowledge that we have had access to such financial and other
     information, and have been afforded the opportunity to ask such questions
     of representatives of the Issuers and receive answers thereto, as we deem
     necessary.

          We understand that the Trustee will not be required to accept for
registration of transfer any Notes acquired by us, except upon presentation of
evidence satisfactory to the Issuers and the Trustee that the foregoing
restrictions on transfer have been complied with.  We further understand that
any Notes purchased by us will be in the form of definitive physical
certificates and that such certificates will bear a legend reflecting the
substance of this paragraph 1 of this 

                                     D-2-2

 
letter. We further agree to provide to any person acquiring any of the Notes
from us a notice advising such person that transfers of such Notes are
restricted as stated herein and that certificates representing such Notes will
bear a legend to that effect.

          We represent that the Issuers and the Trustee and others are entitled
to rely upon the truth and accuracy of our acknowledgments, representations and
agreements set forth herein, and we agree to notify you promptly in writing if
any of our acknowledgments, representations or agreements herein cease to be
accurate and complete.  You are also irrevocably authorized to produce this
letter or a copy hereof to any interested party in any administrative or legal
proceeding or official inquiry with respect to the matters covered hereby.

          We represent to you that we have full power to make the foregoing
acknowledgments, representations and agreements on our own behalf and on behalf
of any investor account for which we are acting as fiduciary agent.

          As used herein, the terms "offshore transaction," "United States" and
"U.S. person" have the respective meanings given to them in Regulation S under
the Securities Act.

          THIS LETTER SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH,
THE LAWS OF THE STATE OF NEW YORK.

                                        Very truly yours,

                                        (Name of Purchaser)


                                        By: _____________________________

                                        Date: ___________________________

          Upon transfer, the Notes would be registered in the name of the new
beneficial owner as follows:

                                        Name: ___________________________

                                        Address: ________________________


                                     D-2-3

 
                                                                       EXHIBIT E
                                                                       ---------

                [FORM OF NOTATION ON NOTE RELATING TO GUARANTEE]

                                   GUARANTEE
                                   ---------


          Each Guarantor (the "Guarantor", which term includes any successor
Person under the Indenture) has unconditionally guaranteed, jointly and
severally, to the extent set forth in the Indenture and subject to the
provisions of the Indenture, (a) the due an punctual payment of the Accreted
Value or principal of and interest on the Notes, whether at maturity, by
acceleration or otherwise, the due and punctual payment of interest on overdue
Accreted Value or principal, and, to the extent permitted by law, interest, and
the due and punctual performance of all other Obligations of the Issuers to the
Noteholders or the Trustee all in accordance with the terms set forth in Article
10 of the Indenture, and (b) in case of any extension of time of payment or
renewal of any Notes or any of such other Obligations, that the same will be
promptly paid in full when due or performed in accordance with the terms of the
extension or renewal, whether at stated maturity, by acceleration or otherwise.

          The obligations of the undersigned to the Holders of Notes and to the
Trustee pursuant to this Guarantee and the Indenture are expressly set forth in
Article 10 of the Indenture and reference is hereby made to the Indenture for
the precise terms of the Guarantee and all of the other provisions of the
Indenture to which this Guarantee relates.

          THIS GUARANTEE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH,
THE LAWS OF THE STATE OF NEW YORK WITHOUT GIVING EFFECT TO PRINCIPLES OF
CONFLICTS OF LAW.

          This Guarantee is subject to release upon the terms set forth in the
Indenture.

                                      E-1

 
          IN WITNESS WHEREOF, each Guarantor has caused its Guarantee to be duly
executed.

                                          

                                            GUARANTORS:                   
                                                                          
                                            [                          ]  
                                                                          
                                            By:_____________________________
                                               Name:                     
                                               Title:                    
                                                                          
                                            [                          ]  
                                                                          
                                            By:_____________________________
                                               Name:                     
                                               Title:                     

                                      E-2

 
                                                                       EXHIBIT F
                                                                       ---------

                        FORM OF SUPPLEMENTAL INDENTURE
                        ------------------------------

          SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated as of
_______________, among [        ] (the "New Guarantor"), a subsidiary of Muzak
Holdings LLC (or its successor), a Delaware limited liability company (the
"Company"), Muzak Holdings Finance Corp., a Delaware corporation ("Finance
Corp., and together with the Company, the "Issuers"), the Guarantors (if any)
(the "Existing Guarantors") under the Indenture referred to below, and State
Street Bank and Trust Company, as trustee under the Indenture referred to below
(the "Trustee").

                             W I T N E S S E T H :
                             -------------------  

          WHEREAS the Issuers have has heretofore executed and delivered to the
Trustee an Indenture (as such may be amended from time to time, the
"Indenture"), dated as of March 18, 1999, providing for the issuance of an
aggregate principal amount at maturity of $75,000,000 of Senior Discount Notes
due 2010 (the "Notes");

          WHEREAS Section 4.22 of the Indenture provides that under certain
circumstances the Issuers is required to cause the New Guarantor to execute and
deliver to the Trustee a supplemental indenture pursuant to which the New
Guarantor shall unconditionally guarantee all of the Issuers' obligations under
the Notes pursuant to a Guarantee on the terms and conditions set forth herein;
and

          WHEREAS pursuant to Section 8.01 of the Indenture, the Trustee, the
Issuers and Existing Guarantors are authorized to execute and deliver this
Supplemental Indenture;

          NOW THEREFORE, in consideration of the foregoing and for other good
and valuable consideration, the receipt of which is hereby acknowledged, the New
Guarantor, the Issuers, the Existing Guarantors (if any) and the Trustee
mutually covenant 

                                      F-1

 
and agree for the equal and ratable benefit of the Noteholders as follows:

          1.   Definitions.  (a) Capitalized terms used herein without 
               -----------                                             
definition shall have the meanings assigned to them in the Indenture.

          (b)  For all purposes of this Supplemental Indenture, except as
otherwise herein expressly provided or unless the context otherwise requires:
(i) the terms and expressions used herein shall have the same meanings as
corresponding terms and expressions used in the Indenture; and (ii) the words
"herein," "hereof" and "hereby" and other words of similar import used in this
Supplemental Indenture refer to this Supplemental Indenture as a whole and not
to any particular section hereof.

          2.   Agreement to Guarantee. The New Guarantor hereby agrees, jointly
               ----------------------                                           
and severally with all other Guarantors, to guarantee the Issuers' obligations
under the Notes on the terms and subject to the conditions set forth in Article
10 of the Indenture and to be bound by all other applicable provisions of the
Indenture. From and after the date hereof, the New Guarantor shall be a
Guarantor for all purposes under the Indenture and the Notes.

          3.   Ratification of Indenture; Supplemental Indentures Part of
               ----------------------------------------------------------
Indenture. Except as expressly amended hereby, the Indenture is in all respects
- ---------                                                                       
ratified and confirmed and all the terms, conditions and provisions thereof
shall remain in full force and effect. This Supplemental Indenture shall form a
part of the Indenture for all purposes, and every Noteholder heretofore or
hereafter authenticated and delivered shall be bound hereby.

          4.   Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY,
               -------------                                                    
AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK BUT WITHOUT
GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW.

                                      F-2

 
          5.   Trustee Makes No Representation. The Trustee makes no
               -------------------------------                       
representation as to the validity or sufficiency of this Supplemental Indenture.

          6.   Counterparts. The parties may sign any number of copies of this
               ------------                                                    
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement.

          7.   Effect of Headings. The Section headings herein are for
               ------------------                                      
convenience only and shall not affect the construction thereof.

                                      F-3

 
          IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed as of the date first above written.


                              [NEW GUARANTOR]



                              By:_________________________________
                                 Name:
                                 Title:

                              By:_________________________________
                                 Name:
                                 Title:



                              MUZAK HOLDINGS LLC


                              By:__________________________________
                                 Name:
                                 Title:


                              By:__________________________________
                                 Name:
                                 Title:



                              MUZAK HOLDINGS FINANCE CORP.



                              By:__________________________________
                                 Name:
                                 Title:

                                      F-4

 
                              By:__________________________________
                                 Name:
                                 Title:

                                      F-5

 
                              EXISTING GUARANTORS:

                              
                              By:__________________________________
                                 Name:
                                 Title:

                              

                              By:__________________________________
                                 Name:
                                 Title:

                              
                              TRUSTEE:

                              
                              STATE STREET BANK AND TRUST 
                              COMPANY, as Trustee


                              By:__________________________________
                                 Name:
                                 Title:

                                      F-6