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Pioneer PRO Series 12" 1,500-Watt Subwoofer in the Mobile Audio department at Lowes.com
Pioneer Champion Series 12" Dual-Voice-Coil 4-Ohm Subwoofer Black TSW311D4 - Best Buy
Pioneer TS-A301S4 | 500W RMS 12" Champion Series Subwoofer
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 TSA300S4 12" 1500w 4Ohm Subwoofer
Pioneer Champion Series PRO TS-W3003D4 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Amazon.com: Pioneer 1300 Watt 12 Inch Single 4-Ohm Car Audio Subwoofer, 2 Pack | TS-W126M : Electronics