Diamond Audio D612D4 D6 Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Ak12s5 Series OEM Brand High Quality Paper Cone High Level Subwoofer 5000W RMS 12 Inch Speaker with Aluminum Basket Car Audio Price Negotiable - China Car Speaker, Shadow Subwoofer | Made-in-China.com
Amazon.com: Diamond Audio DMD124SH 12" 600W Diamond Shallow Series Dual 4 Ohm Car Subwoofer + Free LAB Sticker : Electronics
Black Diamond 12" 1200 Watts 2-Ohm DVC Bass Subwoofer DIA-R12D2 — Big Jeff Online Inc
Diamond Audio DES122 Diamond Elite Series 500W RMS 12" Dual 2 Ohm Car Subwoofer | eBay