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Alpine SWR-1242D (SWR1242D) 12" Dual 4 ohm Type-R Car Subwoofer
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Alpine R-Series R2-W12D2 12 Inch Dual 2-Ohm Voice Coils Subwoofer with 750W RMS
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Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
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Alpine Halo R2-Series Dual 12" Voice Coil 4-Ohm Loaded Subwoofer Enclosure Black R2-SB12V - Best Buy
2 Alpine Type-R R2-W12D2 12" 750w RMS Car Subwoofers+Mono Amplifier+Amp Kit - Rockville Audio
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Alpine SWR-1222D Type-R 12" subwoofer with dual 2-ohm voice coils at Crutchfield
