Alpine Type X 12 subwoofer VS wallsocket 120 volts - YouTube
Alpine Type-X SWX-1042D 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine X-W12D4 900W RMS 12" Type X-Series Dual 4-ohm Subwoofer
Alpine X-W12D4 X-Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine SWR-12D4 Woofer, 1000 W RMS, 3000 W PMPO, 1 Pack - Walmart.com
Amazon.com: Alpine ALP19-R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 1500W Peak 12" Subwoofer : Electronics
Amazon.com: Alpine Bundle Compatible with Universal Car X-W12D4 Type X 12" Loaded SPL Bass Subwoofer Labyrinth Vent Sub Box Stereo Enclosure : Electronics
Alpine SWR-1222D Type-R 12" subwoofer with dual 2-ohm voice coils at Crutchfield