I believe I have the ASII, it is a cd and cassette. I have the center speaker in the dash two speakers in the drivers doors and one each rear doors. I do not have speakers on the rear deck. Can I replace just the stereo part with a different cd player and still have everything work, i.e. the speakers. I have heard that since my car has an external amplifier that a new head unit will not work with it. I really want this unit:
