Hi all,

I have 93 320 Japanese import that came with a sony + 10 disc changer installed over there (hence the fm frequency range differ from here), I want to install a pioneer head unit cd/mp3/wma

first how do I know if my car has a amplifier or just aftermarket sony head unit, were can i see it how can i tell?
secondly how should I connect the pioneer in case i dont want to use the factory built in amp since the pioneer already has 22x4 rms power, but will doing so give full range to the tweeter and probbally blow it up? (or i sthe factory amp even more power ful than the pioneer head unit and are the cross overs built in to it decent to keep it?)

thanx