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Alpine SWS-15D2 Type-S 15" subwoofer with dual 2-ohm voice coils at Crutchfield
Fits 06-15 Dodge Ram Mega Cab Truck Alpine S-W10D2 Type S C10 Dual 10 Sub Box 793276242174 | eBay
2) ALPINE SWR-1522D 4000W 15" CAR AUDIO SUBWOOFERS TYPE R WITH 2-OHM DVC SUBS | eBay
Ported (Recessed) Sub Box Enclosure for 1 15" Alpine Type-R SWR Subwoofer -32 hz | eBay
Memphis PRXA600.1 Power Reference Series Mono Subwoofer Amplifier and a Alpine S-SB12V Pre-Loaded S-Series 12-inch Subwoofer Enclosure - Creative Audio
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Breathing Life back into this 16 year old Alpine Type-R 15" subwoofer... - YouTube
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Alpine SWS-15D2 - Type S 15" Subwoofer - Signature Car Sound
Alpine SWS-15D2 Type-S 15" subwoofer with dual 2-ohm voice coils at Crutchfield