Sparton (SPA) 8-K/A Completion of Acquisition or Disposition of Assets

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Sparton Corporation

Schaumburg, Illinois

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-82380, 333-156388, 333-164057 and 333-194917) of Sparton Corporation of our report dated June 30, 2015, except for Notes 3, 4 and 14 which are as of July 23, 2015, relating to the consolidated financial statements of Hunter Technology Corporation and Subsidiaries, which appears in this Form 8-K/A.

/s/ BDO USA, LLP

Grand Rapids, Michigan

July 23, 2015