Best Buy: Pioneer Champion Series 10" 1000W Dual-Voice-Coil 4-Ohm Subwoofer TS-W257D4
Pioneer TSA301S4 - Champion Series 12" 1600W Single 4 Ohm Component Subwoofer | Truck&Gear
PIONEER PREMIER TS-W1007D4 CHAMPION SERIES SUBWOOFER *OLD SCHOOL* 12562848990 | eBay
Amazon.com: 2 X Pioneer TS-300D4 12 Inch 1400 Watts Max Power Dual 4-Ohm Voice Coil Car Audio Stereo Subwoofer Loudspeakers/Free Alphasonik Earbuds : Electronics
Amazon.com: PIONEER TS-W3003D4 Champion Series PRO 12" 2,000-Watt Subwoofer : Electronics
Pioneer TS-W310D4 Champion Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield
TS-W260D4 - 10" Champion Series Subwoofer with Dual 4 Ω Voice Coils | Pioneer Electronics USA
Pioneer TS-W3003D4 12" Dual 4-Ohm Car Component Subwoofer – DiscountCentralOnline
TS-W2502D2|D4 - 10" Champion Series PRO Subwoofer with 3000 Watts Max. (800 Watts Nom.) | Pioneer Electronics USA
Pioneer TS-W308D4 Champion Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield
TS-W260S4 - Pioneer 10" 350W RMS Single 4-Ohm Champion Series Subwoofer
PIONEER CHAMPION SERIES TS-A301S4 1600 WATTS 12" SINGLE 4 OHM CAR SUBWOOFER SUB | 702MOTORINGLASVEGAS
Pioneer TS-A301S4 | 500W RMS 12" Champion Series Subwoofer