Amazon.com: American Sound Connection 312H Universal Large Car Trunk Triple 12" Sealed Subwoofer Rear Angle 3 Sub Box Stereo Enclosure and S-W12D2 Type S Series Sub Dual 2 Ohm 1200W Peak 12"
Best Buy: Alpine X-Series 12" Dual-Voice-Coil 4-Ohm Subwoofer Black X-W12D4
Alpine Type-R SWR-12D4 12" 3000w DVC 4-Ohm Car Subwoofer + Single Sealed Sub Box | Audio Savings