Most of the subs can be found cheap in my area on Craiglist.
Memphis 15-PR12D4 (15pr12d4) 12" Subwoofers Car Subwoofers Car Audio Car Audio, Video, & GPS Navigation - Sonic Electronix
Friend has two of these subs with a Sony Xplod 1800 watt amp but no deep bass just rattles.
I was...