I'm in the market for a new sub. I've always had rockford. I have a yellow top,170 amp alternator, 100amp fuse curcuit, 4 gauge wiring, 1 farad cap, T15001bd rockford power series 1500 watt mono amp. I was looking at the JL w7 13.5 and the Rockford fosgate power series stage 2 15in. (T215D4)...