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
FF6.5 Front Firing Subwoofer - Earthquake Sound Shop
Loaded Enclosure: 6.5" Audio Ace Subwoofer + Tru Spec 6.5" Subwoofer enclosure - GP Car Audio