JL Audio 12W0v3-4 W0v3 Series 12" 4-ohm subwoofer at Crutchfield
JL Audio 12WX-4 12 Inch Single 200 Watt 4 Ohm Subwoofer | eBay
Amazon.com: Seismic Audio - SA-LAF124-12 Inch Dual 4 Ohm Car Audio Subwoofer 2200 Watt Max Power : Everything Else
JL Audio 12W1v3-4 | 300W RMS 12" Single 4-Ohm Subwoofer
JL Audio Gotham V2 Review: Stereo Magazine
Amazon.com: Atrend 12JLX3SV JL Audio 12” Single Vented Subwoofer/Speaker Enclosure Compatible with WX & W3 Series Subwoofers. Made in USA : Electronics