i have recently installed my system myself and possibly blew my amp... the power wire to the batt. got pinched in the door (yes i know lazy didnt go through firewall) and got cut in half the amp shut off and i rewired it but now the subs sound like they are only getting half power it seems like it took the bass out. the amp still powers on and the subs flex just as they did b4 but with only half the bass? what could be worng? amp blown? subs blown? any suggestions welcome thanks.