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Alpine RS-W12D4 12-inch R-Series Shallow Subwoofer with Dual 4-Ohm Voice Coils - Creative Audio
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Best Buy: Alpine Type R 10" Dual-Voice-Coil 4-Ohm Subwoofer SWR-1043D
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Amazon.com: Alpine R-W10D4, R Series Dual 4 Ohm Voice Coil 2250 Watts Subwoofer, 10" : Electronics
Alpine SWR-1042D Type R10” Subwoofer with Dual 4-ohm Voice Coils (Used). | eBay
Alpine SWR-1042D (SWR1042D) 10" Dual 4 ohm Type-R Car Subwoofer
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Alpine R-Series 10" Halo Subwoofer Enclosure - R2SB10V | Abt
Alpine R2-SB10V Single Type R2 10-in Subwoofer in Vented Enclosure - Creative Audio
