Amazon.com: Massive Audio HIPPOXL122R – 12 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 12" Subwoofer 3000 Watt RMS, 6000w MAX Dual 2 Ohm, 4 Inch Voice Coil. Sold Individually : Electronics
DS18 PRO-BX21N.1 21" Neodymium Woofer 6000 Watts 6" 1-Ohm SVC Car stereo pro audio Audio car home system Subwoofers
Amazon.com: American Bass Godfather 1222 12" Subwoofer 3000 Watts RMS 6000 Watts MAX : Electronics
American Bass GF-1211 12-inch Godfather Series Dual 1 Ohm Subwoofers 3000 Watts RMS 6000 Watts Max Power 400 Oz Magnet 4" Voice Coil,Black - Walmart.com