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Customer Reviews: Alpine SWR-12D4 Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
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R-W12 Alpine Type R 12 Inch 2250 Watt Max 4 Ohm Round Car Audio Subwoofer %7C R%2DW12D4
Alpine Type-R R-W12D4 12" 750w RMS Subwoofer+Mono Amplifier+Bass Knob+Amp Kit - Walmart.com
Amazon.com: Alpine R-W12D2 Dual 2 Ohm 1500W Peak 12" Subwoofer : Electronics
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Alpine SWR-1242D (SWR1242D) 12" Dual 4 ohm Type-R Car Subwoofer
Best Buy: Alpine Type-R 12" 1000W Subwoofer Black SWR-12D4
Alpine Type R2-W12D2 12 Inch 2250 Watt Max 2 Ohm Round Car Audio Subwo – absoluteusa
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2 Alpine Type-R R2-W12D2 12" 750w RMS Car Subwoofers+Mono Amplifier+Amp Kit - Rockville Audio
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