I have a DXI Polk audio bass system and a 1000 watt amp, I was driving home one day and all of a sudden it just stop working at the volume of 20 which is what I usually put it at, the bass works fine if I turn it to 10 though, but if I exceed 10 the bass stops working. Any idea what's wrong?? (I've made sure everything was wired up) can someone tell me if I blew my amps or something ?