JL Audio revamps their line of car audio subwoofers and amplifiers for 2012 - Car Stereo Reviews & News + Tuning, Wiring, How to Guide's
Amazon.com: H YANKA 12 Inch Subwoofer - 12 Inch Paper Cone Subwoofer Car Audio, Black Steel Basket, Dual Voice Coil 4 Ohm Impedance 12 subwoofer, 1600W MAX Power 12 inch Competition Subwoofer : Electronics
NeweggBusiness - Car Subwoofer by HippoXL122 - SPL Extreme Bass Woofer - 12 Inch Car Audio 4,000 Watt HippoXL Series Competition Subwoofer, Dual 2 Ohm, 3 Inch Voice Coil. Sold Individually
55 Series 15" 2Ω Dual Voice Coil Subwoofer | MTX Audio - Serious About Sound ®