i just had a JL audio 12 inch w6v2 installed in my 95 LS 400. When they wired in the amp, they disconnected the stock sub in the back and used that as the imput for the new amp. However, the new amps imput can barely handle that strong of an imput and when i turn it up loud, the distortion from the stock amp is compounded with the new amp and my sub sounds bad at volumes past 3/8 of full volume. i was wondering if anyone knew if the stock sub was powered by a seperate amp and if so where that was located. im going to try to have them rewire the preamp from that to my new amp since i already disconnected my stock sub and im not using it. if the stock sub is run off the headunit, where is the closest preamp line or regular speaker lines to wire the sub off of. i assume that the back door speakers would be the closest speakers to wire off of but i don't know. any help or information would be greatly appreciated.