American Bass TNT-1544 DVC4 15 in. Subwoofer - 800 watt RMS & 1600 watt Max - Walmart.com
Crunch 12 800 W 4 Ohm Car Subwoofer Speaker (2 Pack) w/ Audio Stereo Amplifier, 1 Piece - Ralphs
BOSS Audio Systems CXX10 Chaos Exxtreme Series 10 Inch Car Audio Subwoofer - 800 Watts Max, Single 4 Ohm Voice Coil, For Truck, Boxes and Enclosures, Use With Amplifier
Boss Audio Systems 10 in. Dia 800-Watt 4 Ohm Car Audio Power Single Voice Coil Subwoofer CXX10 - The Home Depot