I have a 2003 Mustang and just installed a 12 inch 2500 Watt peak Power Acoustic Gothic sub mounted in a Qpower Single 12" Side Ported SPL Xtra Large Heavy Duty Woofer Box. The sub is powered by a 3000 watt peak planet audio class D amp which is run through a 2 farad boss audio capacitor which I connected to a second battery system located in the trunk. The wiring from the sub to the amp in 8 gauge and all the other wiring from the amp to the capacitor to the battery is 4 gauge. The box has roughly 3.7 cubic feet. Let me know what enhancements I can/need to make.