Alpine S-W12D4 | 600W RMS 12" Type-S Series Dual 4 Ohm Car Subwoofer
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2) Alpine Type-S SWS-12D4 12" 1500w Car Subwoofers Subs+Mono Amplifier+Amp Kit | Audio Savings
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Alpine 12" Single-Voice-Coil 4-Ohm Loaded Subwoofer Enclosure Black SWT-12S4 - Best Buy
Alpine S-W12D4 12 Inch Dual 4 Ohm Voice Coil Subwoofer Driver – Car Toys
Subwoofer Specific, Alpine, E-S-R-X Subwoofer – Atrend USA
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2) Alpine Type-R R2-W12D4 12" 750w RMS Car Subwoofers+Vented Sub Box Enclosure - Rockville Audio
2 Alpine Type-R R2-W12D2 12" 750w RMS Car Subwoofers+Mono Amplifier+Amp Kit - Rockville Audio
Alpine W12S4 12-Inch Bass Subwoofer (4Ohm) – Shop Audio Depot
Alpine Type S S-W12D2 Triple 12" Subwoofer Loaded 900 Watt Sub Box Enclosure New - Final 1.3 Ohm | ALPINE-PACK177A
Alpine R-Series R2-W12D2 12 Inch Dual 2-Ohm Voice Coils Subwoofer with 750W RMS
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Alpine Jeep Wrangler Single 12-Inch Alpine Halo R-Series Preloaded Subwoofer Enclosure with ProLink R2-SB12V (Universal; Some Adaptation May Be Required) - Free Shipping
Alpine Halo R2-Series Dual 12" Voice Coil 4-Ohm Loaded Subwoofer Enclosure Black R2-SB12V - Best Buy
Alpine S-Series 12" Dual-Voice-Coil 4-ohm Subwoofer Black S-W12D4 - Best Buy
Alpine Type-S SWS-12D4 12" 1500 Watt Dual 4-Ohm Car Audio Subwoofer Sub SWS12D4 | Audio Savings
