i recently bought 2 sony xplod 12" subs, a "1000 watt" sony xplod amp, and a pioneer deck. I did all of the wiring and put the subs in a bandpass in the trunk of my car. After adjust all of my amp and deck settings i can't get much of a bass out of my subs. How much will an equalizer, crossover, and or capacitor help. I do get a little bass but not much. I rechecked all of the wiring. what should i do or buy?