Amazon.com: Pyramid 12 Inch Car Subwoofer Speaker - 500 Watt High Powered Car Audio Sound Component Speaker System w/ 1.5 Inch Kapton Bobbin Voice Coil, 8 Ohm, 25 oz Magnet, Cloth Edge
Nemesis Audio NA-8E v.2 8" Car Subwoofer 500 Watts DVCSpecifications: – Moon Car Stereo
Bose Bass Module 500 Black Subwoofer for sale online | eBay