Pioneer TS-W3002D4 Champion Series Pro 12" sub with dual 4-ohm voice coils at Crutchfield
2 X Pioneer TS-300D4 12 Inch 1400 Watts Max Power Dual 4-Ohm Voice Coil
TS-W3002D2 - 12" Champion Series PRO Subwoofer with 3500 Watts Max. (1000 Watts Nom.) | Pioneer of Canada - English
Amazon.com: Pioneer TS-A300D4 12 Inch 1500 Watts Max Power Dual 4-Ohm Voice Coil A Series Car Audio Stereo Subwoofer Loudspeakers / Free Alphasonik Earbuds : Electronics
Pioneer TS-W3002D2 Champion Series Pro 12" sub with dual 2-ohm voice coils at Crutchfield
Pioneer Champion Series 12" Dual-Voice-Coil 4-Ohm Subwoofer Black TSW311D4 - Best Buy
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Pioneer TS-A301S4 at Onlinecarstereo.com
TS-W310S4 - Pioneer 12" 400W RMS Single 4-Ohm Champion Series Subwoofer
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TS-W3003D4 - 12" Champion Series PRO Subwoofer with Dual 4 Ω Voice Coils and 2,000 Watts Max Power (600 Watts Nominal) | Pioneer Electronics USA