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Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
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Rockford Fosgate P3D4-15 Punch P3 15" subwoofer with dual 4-ohm voice coils at Crutchfield
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Audiobahn AW1200Q 12" Dual 4-ohm Voice Coil Component Subwoofer at Crutchfield
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Alpine SWR-1042D Type-R 10" subwoofer with dual 4-ohm voice coils at Crutchfield
