Amazon.com: Rockville (2) W12K9D4 12" 8000 Watt Car Subwoofers Dual 4-Ohm Subs CEA Compliant : Electronics
TROPO-6.5 - 400 Watt 6.5 Inch Car Subwoofer - CT Sounds – CT SOUNDS
Amazon.com: Pair of Gravity Warzone 12 Inch 6000 Watt Car Audio Subwoofer w/ 4 Ohm DVC Power (2 Woofers) : Electronics
SVR-8 | 8" 800 Watt Max Power Car Subwoofer - Skar Audio
SDR-10 | 10" 1,200 Watt Max Power Car Subwoofer - Skar Audio
Crunch Crw12d4 12 Inch 800 Watt Max 4 Ohm Dual Voice Coil Car Subwoofer Speaker With 2 Channel 1000 Watt Amp A/b Class Car Audio Stereo Amplifier : Target
Monoprice 8in 60-Watt Powered Subwoofer, Black - Monoprice.com
BOSS Audio Systems P126DVC Phantom Series 12 Inch Car Audio Subwoofer – 2300 Watts Max, Dual 4 Ohm Voice Coil, Sold Individually, For Truck Boxes and Enclosures, Hook Up To Amplifier