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
JBL CLUB1224AM Club Series 12 Inch Subwoofer with SSi Selectable Impedance - 2 or 4 Ohm - Creative Audio
Amazon.com: JBL - Two STAGE122D 12" Dual 4ohm DVC Car Subwoofers 250 Watt RMS : Electronics
JBL Stage 1210d 12" 1000 Watts Peak Power Dual Voice Coil Car Audio Subwoofer for sale online | eBay
JBL Club Series 12" 1100 Watts Selectable 2 or 4 Ohm Subwoofer CLUB 1224 - Walmart.com
Amazon.com: JBL Club 1224 - 12” Subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm, Black : Electronics
Amazon.com: Gravity Audio 1200W Professional 12" Power Car Subwoofer 4 OHM IMPED Dual Voice Coil GR-12PW : Electronics
Amazon.com: JBL 12" Car Audio Subwoofer : Electronics