SWR-12D4 | 2250W Peak 12" Series Dual 4-Ohm Car Sub | Alpine
SWR-12D2 - Alpine 12" Dual 4-Ohm Type-R Series Subwoofer
Amazon.com: Alpine ALP19-R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 1500W Peak 12" Subwoofer : Electronics
Alpine R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 2250W Peak 12" Subwoofer | ALP19-R-W12D4
Subwoofer Box Alpine Type R SWR-1242D | Ported Box | Slot
Customer Reviews: Alpine SWR-12D4 Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine type-r 12 MG-1912 Red Metal Cone, Chrome Basket - ecoustics.com
Amazon.com: Alpine R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 2250W Peak 12" Subwoofer and HA-SWKD Dual Subwoofer Sub Box Install Kit : Electronics
Amazon.com: Alpine ALP19-R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 1500W Peak 12" Subwoofer : Electronics