FIERCE 6 Inch Subwoofer | 6.5 Inch Car Subwoofers | 200 Watts RMS – TORO AUDIO
Axton ATW16 16.5 CM / 6.5″ Subwoofer 2 x 2 Ohm 150 Watt Kickbass Woofer | eBay
6.5" Subwoofer Dual 4 Ohm 500 Watts Max Car Audio Sub Audiopipe TXX-BDC4-6 - Walmart.com
Car Subwoofer by HippoXL64 - SPL Extreme Bass Woofer - 6.5 Inch Car Audio 300 Watt HippoXL Series Competition Subwoofer, Dual 4 Ohm, 2 Inch Voice Coil. Sold Individually Car Electronics Accessories - Newegg.com