Best Buy: Pioneer Champion Series 12" Single-Voice-Coil 4-Ohm Subwoofer Black TSW310S4
Pioneer TSW312D4 Champion Series 12" 1500 Watt Dual 4 Ohm Voice Coil D – NLD Prime
Pioneer Champion Series TS-A301D4 1600 Watts 12 inch Dual 4 Ohm Subwoofer - Walmart.com
Pioneer TS-W312S4 | Car Entertainment, Subwoofers, Champion Series Subwoofer, Champion Series Red Subwoofer | Pioneer Middle East - Car Stereo, Car Subwoofer, Amplifier
Amazon.com: PIONEER TS-A301S4 - Powerful 12-inch Subwoofer, 1600 Watts Peak Power, Single 4 Ohm Voice Coil for a Powerful Bass : Electronics
TSA301S4 by Pioneer - 12" - 1600 W Max Power, Single 4 Ohm Voice Coil, Champion Series- Component Subwoofer | VK Electronics
Pioneer TS-W3002D4 12 Inch Champion Series PRO Subwoofer with 3500 Watts Max. | eBay
Amazon.com: PIONEER CAR TSA301D4 12-inch 1600 W Max Power, Dual 4 Ohm Voice Coil for for Powerful Bass Champion Series - Component Subwoofer : Electronics