Sundown Audio U 12" inch DVC Dual 4 Ohm (U Series) Car Subwoofer 1500 Watts RMS
Amazon.com: Skar Audio DDX-12 D4 12" 1500 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
BOSS Audio Systems CH10DVC Chaos Series 10 Inch Car Audio Subwoofer - 1500 Watts Max, Dual 4 Ohm Voice Coil, Sold Individually, For Truck, Boxes and Enclosures, Use With Amplifier - Walmart.com