15 inch Subwoofer Replacement PRO DJ Speaker Sub Woofer Loudspeaker Wide Full Range Loud Aluminum Frame,2200W PMPO, 90oz Magnet, y-30 Grade Powerful Magnet 5 Core (15185 08 AL) Car Subwoofers - Newegg.com
Focal Sub P 30 12 in 300W RMS Single 4 ohm Car Subwoofer | eBay