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Amazon.com: Alpine ALP19-R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 1500W Peak 12" Subwoofer : Electronics
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Alpine 12” Type R-Series Powered Ported Bass Package Includes one Alpine R-W12D4 12” subwoofer, R-A75M amplifier, and 2.25 ft³ optimized ported enclosure
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Amazon.com: Alpine Bundle Compatible with Universal Car S-W12D2 Type S Dual 12" Custom Loaded Vented Sub Box Enclosure : Electronics
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