the panasonics were obviouly aftermarket. the amp is hard to find. there is plenty of info on this site, so search. the easist way is to rewire them.twizy said:I just replaced my front and rear speakers this weekend. After the new speakers were in, my rear speakers were considerably louder than my fronts. Is it safe to say that I have an amp for my rear speakers somewhere? I wasn't able to find any silver box mounted underneath my rear deck. How exactly do you spot where it is? I also discovered that the stock front and rear speakers in my 92 were Panasonics. Anyone else replace their stocks and discover they had Panasonics?