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Pioneer TS-D12D2 - 12 Inch Dual 2 Ohms Voice Coil Subwoofer - Car subwoofers - Custom Sounds & Tint
Pioneer TS-W312D4 12" 12 inch Dual Voice Coil 4 ohm Car Component Subwoofer | eBay
Pioneer TS-A2000LD2 Shallow-mount 8" subwoofer with dual 2-ohm voice coils at Crutchfield
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