Alpine SBR-S8-4 Type-R 8 (SWR-8D2, 4) Enclosure System -
Alpine Type-R SWR-12D4 12" 3000 Watt Dual 4-Ohm Car Audio Subwoofer Sub SWR12D4 | Audio Savings
R-W12 Alpine Type R 12 Inch 2250 Watt Max 4 Ohm Round Car Audio Subwoofer %7C R%2DW12D4
Alpine - SWR-1542D Subwoofer van 15" (38cm) (4Ohm+4Ohm)
Universal Car Stereo Slotted S Port Single 10" Alpine Bundle Type R R-W10D4 Sub Box Enclosure with Harmony HA-A800.1 Amplifier & 4GA Amp Kit - Walmart.com
Alpine 10” Type-R Thin Powered Sealed Bass Package Includes one Alpine SWR-T10 10” thin subwoofer, one R-A75M amplifier, and sealed enclosure
R-W10D4 - Subwoofer
Alpine SWR-1222D Type-R 12" subwoofer with dual 2-ohm voice coils at Crutchfield
Alpine 10” Type-R Thin Powered Sealed Bass Package Includes One Alpine SWR-T10 10” Thin Subwoofer, One R-A75M Amplifier, And Sealed Enclosure | islamiyyat.com
Alpine SWR-8D2 Type-R 8" subwoofer with dual 2-ohm voice coils
Amazon.com: Alpine ALP19-R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 1500W Peak 12" Subwoofer : Electronics