Amazon.com: PIONEER TS-A120D4 A Series 12" 1500 W Max Power, Dual 4 Ohm Voice Coil, IMPP Cone, Rubber Surround - Component Subwoofer, Black : Electronics
Pioneer TS-A301S4 Champion Series12 Inch 1600-Watt Max Single-Voice-Coil 4-Ohm Component Subwoofer - Black - Walmart.com