JBL GT-BassPro12 Ported powered subwoofer with 12" sub and 150-watt amp at Crutchfield
Amazon.com: Kicker Bundle Compatible with Universal Vehicle 44CWCD124 12" Dual 4Ohm 12" with 46CXA4001 800W Sub Amp and 112VH 12" Sub Box : Electronics
12" Twin Active Amplified Double Bass Box Sub Car Subwoofer Amp Amplifier 3600W! | eBay