Amazon.com: Massive Audio SUMMOXL124-12 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 12" Subwoofer 1500 Watt RMS, 3000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Gravity Warzone 12 Inch 3000 Watt Car Audio Subwoofer w/ 4 Ohm DVC Power (Single) : Electronics
Sundown Audio Nightshade NSv6 12" inch DVC Dual 2 Ohm (NS Series) Car Subwoofer 3000 Watts RMS