Amazon.com: American Bass Dx124 12 600w 4 Ohm Car Aduio Subwoofer Sub 600 Watt Dx-124 : Electronics
Javelin Series Single 10" 600 Watt Loaded Car Subwoofer Enclosure - Po | Audio Legion
Sundown Audio SLD 12" inch DVC Dual 4 Ohm (SLD Series) Shallow Car Subwoofer 600 Watts
BOSS Audio Systems BE8D Elite Series 8 Inch Car Audio Subwoofer - 600 Watts Max, Dual 4 Ohm Voice Coil, For Truck Boxes and Enclosures, Hook Up To Amplifier - Walmart.com