Gravity 10 Inch 1000 Watt Car Audio Subwoofer w/ 4 Ohm DVC Power (Single) : Electronics
Amazon.com: 10" Car Audio Speaker Subwoofer - 1000 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 4 Ohm, 50 oz Magnet, 2 Inch
Amazon.com: Low Profile Marine Subwoofer System - 1000 Watt 8 Inch Slim Active Waterproof Amplified Bass Speaker - Underseat Mount Audio Sound Amplifier Box For Small Boat, Marine Vehicles - Lanzar AQTB8 (
Best Buy: Polk Audio 12" 1000-Watt Powered Subwoofer Black DSW PRO 660WI BLK 110V
Yamaha NS-SW1000 1000W Powered Subwoofer, Single, Piano Black NSSW1000PN