New bass head here....I recently bought an Alpine Type R Sub (SWR-1242D) and i bought a Pioneer 1200w max amp (GM-D8500M). The amp is a Class D Mono. and for some reason the sub isnt hitting AT ALL. It gets a little bass, but not enough to notice when the trunk is closed. I checked to see if the "phase" was correct it is, and i have the jumpers set correctly per the instructions...i dunno what else to do besides going to best buy and smacking the whole car audio dept. until i get some satisfaction...any hep would be appreciated.