Amazon.com: SoundQubed HDS2.2 Series 15" Car Audio Subwoofers 15" Heavy Duty Series Subwoofers for Car – 600 Watts High Powered Car Subwoofer Audio Sound Speaker System (15", 4 Ohm) : Electronics
PowerBass 1 3XL-810D 3XL Series 8" Dual 1-Ohm Subwoofer and 1 SWX-8G 8" Subwo... | eBay
Kicker 42CWQ152 1100W RMS 15” CompQ Series Dual 2 Ohm Voice Coil Subwo – SHOP CUSTOM AUTO