Installed my old ALPINE 7815 headunit the other day. Sounds as good today as it did 6 yrs ago! But not good enough. SO, I just ran SCOSCHE wires to behind the rear seat of Jeep cherokee for myALPINE 3522 BRIDGEABLE DUO-B-CURCUIT amp.I got 2,dual 4ohm DVC 500 watt MTX THUNDERPROS .wHO DO YOU...