Infinity Kappa 1000W 10" Car Audio Subwoofer 1800 Watt MAX Selectable Impedance 50667371326 | eBay
Amazon.com: Planet Audio AC12D 12 Inch Car Subwoofer - 1800 Watts Max, Dual 4 Ohm Voice Coil, Sold Individually, For Truck Boxes and Enclosures, Hook Up To Amplifier : Electronics
10" inch 25cm 1800 WATTS Car Audio Subwoofer SPEAKER Dual 4 ohms Quality Sound | eBay