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
SLD-Series SD-2 10" 600W Shallow Mount Subwoofer – Sundown Audio
NEW 18" inch SUPER WOOFER 8 ohm for High Power Stereo 600W subwoofer Speaker | eBay
Pyle 6 in. 600-Watt Max Dual Voice Coil 4-Ohm Car Audio Power Subwoofer (8-Pack) 8 x PLPW6D - The Home Depot
Massive Audio UFO12 – 600w Dual 4 Ohm Subwoofer
DD AUDIO SW10a-D4 10" SUB WOOFER 600W DUAL 4-OHM CAR SUBWOOFER BASS SPEAKER NEW | eBay