Amazon.com: PIONEER TS-D12D4 D Series 12" 2000 W Max Power, Dual 4 Ohm Voice Coil, Aramid Fiber IMPP Cone, Rubber Surround - Component Subwoofer : Electronics
Pioneer 12" Champion Series PRO Car Subwoofer 2000W (TS-W3003D4) | Sky.Garden
Pioneer TS-W1200PRO Pro-Series 12 inch 450 Watt Subwoofer
Pioneer Electronics on Twitter: "The Champion Series Subwoofers feature an enclosed basket structure that is designed to support the steel basket by reducing the spread of vibration that causes bass loss frequency. #