Amazon.com: 10" Car Audio Speaker Subwoofer - 1000 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 4 Ohm, 50 oz Magnet, 2 Inch
New JBL GX1200 1000 Watts 12" 4 Ohm Single-Voice-Coil Subwoofer - Single | eBay