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Best Buy: Alpine Type-R 12" 1000W Subwoofer Black SWR-12D4
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2) ALPINE SWS-12D4 TYPE-S 12" SUBWOOFERS WITH DUAL 4-ohm VOICE COILS 3000 WATTS | 702MOTORINGLASVEGAS
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Alpine - SWR-12D4 12′′ (30 cm) Type-R Subwoofers (4Ω + 4Ω)
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