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
SUNDOWN AUDIO U-15 D4 15" SUB 1500W RMS DUAL 4-OHM SUBWOOFER BASS SPEAKER NEW | eBay