Well I recently bought a subwoofer off craigslist for $100. It was the Alumapro BP-12. It came in a factory bandpass enclosure. Anyways, it sounds fantastic except the fact that I'd like it louder. I'm currently using the rockford fosgate 201s, but I can't bridge it because it's not fully functional. I can only connect it to the right side positive and negative. Any thoughts on any other amp I could get to make the subwoofer work to it's full potential?