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Alpine SWR-1522D Type-R 15" subwoofer with dual 2-ohm voice coils at Crutchfield
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Memphis PRXA600.1 Power Reference Series Mono Subwoofer Amplifier and a Alpine S-SB12V Pre-Loaded S-Series 12-inch Subwoofer Enclosure - Creative Audio
Alpine SWR-1522D Type-R 15" subwoofer with dual 2-ohm voice coils at Crutchfield
CRITICAL MASS 15'' SUB SUBWOOFER AUDIO JL ORION KICKER ALPINE DC JBL VEGA SKAR | eBay
Best Buy: Alpine Type-S 15" Dual-Voice-Coil 8-Ohm Subwoofer Black SWS-15D4
Amazon.com: Alpine Type S Bundle Compatible with 2005-15 Toyota Tacoma Double Cab Truck S-W10D2 Dual 10" Loaded Sub Box Enclosure with S-A60M Amplifier and 4GA Amp Wiring Kit : Electronics
Alpine® 15" Black Type S Car Subwoofer | Paradyme
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Alpine SWR-1542D Type-R 15" subwoofer with dual 4-ohm voice coils at Crutchfield