Exhibit 99.3 CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350 In connection with the quarterly report of Circuit Research Labs, Inc. (the "Company") on Form 10-QSB for the period ending March 31, 2003 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, C. Jayson Brentlinger, Chief Executive Officer of the Company, certify, to the best of my knowledge, pursuant to 18 U.S.C. 1350, as adopted pursuant to 906 of the Sarbanes-Oxley Act of 2002, that: (1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. /s/ C. Jayson Brentlinger ----------------------------- C. Jayson Brentlinger Chief Executive Officer Circuit Research Labs, Inc. May 20, 2003 This certification accompanies this Report on Form 10-QSB pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by such Act, be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934.