Can 02 Bose be changed out for a 03 Bose?
 

Just bought a 02 C4S, and somewhat disappointed with the sound quality of the stock high end bose stereo. I have listend to the 03 Bose which was upgraded for richer sound, and was wondering if I could change the stereo out for an 03 stock Bose, or do my amps and speakers have to be changed too, to match the new stereo?