Hello,,,i just got a 97 GT with the mach 460 system BUT it has a JVC cd player instead of the factory unit,(owner said it was stolen),,problem NO BASS,,,is there a trick or an adapter harness i need to make the subs/amps work? im assuming this is the problem...there ar 2 extra harnesses behind the radio that arent hooked up and the JVC unit seems to be wired correctly...its my first time messing with this kind of system and it doesnt help that it appears to be a hack job aftermarket radio installation...any advice would be greatly appreciated
Mach 460 in a 1997GT-No Bass problem. 
