crawfishman

which way to go? I have the stock sony head unit, i replaced all 4 door speakers with Hertz, I added a JL audio amp with 2 -12 inch subs under the rear seat. Now id like to add an amp to the door speakers in addition or replacing the stock amp, without losing chimes, backup cameras, or anything else. Ive been reading on here and everyone seems to point to the Rockford DSR1, is that an amp? or is that just the wires etc , processor that accepts an aftermarket amp. Somewhere a while back i read that theres an amp thatll plug right in to the factory amp and you dont lose any features. However i dont recall what brand it was. Can anyone give me any kind of help with this topic. I just want to add some volume to the door speakers. Any help would be appreciated!!