NVX 12" 600 watt RMS 1200 watt Peak Professional Grade VS-Series Dual 2-ohm Car Subwoofer [VSW122V2] : Electronics
BOSS ELITE BE8D 600 Watt 8" Inch Dual 4-Ohm Car Truck Bass Audio Subwoofer Sub! 791489125055 | eBay
Audio Systems Amplified Car Subwoofer - 600 Watts Max Power, Low Profile, 10 Inch Subwoofer, Remote Subwoofer Control, Great for Vehicles That Need Bass But Have Limited Space - Walmart.com
Ground zero Radioactive 10″ Subwoofer 600 Watts Rms Sms Car
BOSS Audio Systems CXX8 8 Inch Car Subwoofer - 600 Watts Maximum Power, Single 4 Ohm Voice Coil, Easy Mounting, Sold Individually : Everything Else