Alpine SWX-1043D Type-X 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine Type X 12“ inch Subwoofer with Super Bass ProBox Enclosure for Sale in Denton, TX - OfferUp
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Alpine SWX-1243D at Onlinecarstereo.com
Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
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Alpine Type-X SWX-1042D 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine Type X 12“ inch Subwoofer with Super Bass ProBox Enclosure for Sale in Denton, TX - OfferUp