Hello, new here. My 97 cobra stock mach 460 radio driver side speakers cut in and out when on radio. It's almost like going from stereo to mono. If cd gets inserted, speakers work fine. System is all original with no cuts or splices, and is tape player with single cd player below. All amps work correctly. Was wondering if this is a common problem, and what is the next step. Problem doesn't happen all the time, but is getting annoying. Would an antenna signal booster help? Thanks