Best Buy: Pioneer 12" Dual-Voice-Coil 2-Ohm Subwoofer TS-W307D2
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TS-W3002D2|D4 - 12" Champion Series PRO Subwoofer with 3500 Watts Max. (1000 Watts Nom.) | Pioneer Electronics USA
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2) Pioneer 12" 4000W TS-W3003D4 Car Subwoofers DVC Subs + Sealed Box Enclosure - Walmart.com
Pioneer TS-A301D4 Champion Series 500W 12" Dual 4-Ohms Component Car Subwoofer 884938496049 | eBay
PIONEER PREMIER TS-W1007D4 CHAMPION SERIES SUBWOOFER *OLD SCHOOL* 12562848990 | eBay
LAB SlapBox™ 2.25 ft^3 Ported MDF Enclosure for Single Pioneer TS-W3002D2 / TS-W3002D4 Sub
Pioneer Champion TSW311S4 12-Inch 4 Ohm/1400W Subwoofer (Single) | Tech Nuggets
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Pioneer TS-W3003D4 12" Champion Series Pro Subwoofer With 2000 Watts Max Power - Dual 4 ohm
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