Exhibit 23(a) CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference and use of our report, dated February 15, 2002, (which report is included in Item 8 of the Annual Report on Form 10-K of CNB Corporation for the year ended December 31, 2001) in CNB Corporation's Form S-8 for the 1996 Stock Option Plan. /s/ Crowe, Chizek and Company LLP Crowe, Chizek and Company LLP South Bend, Indiana September 27, 2002 1