From Amazon
Alto Professional TS12S - 2500W 12-inch Subwoofer, Powered PA Speaker with 6 Selectable DSP Modes, Easy Setup, 130 dB, 3" Voice Coil, Superior Bass
Music Gear Direct
Alto Professional TS12S 12" Subwoofer Durable Slip-On Cover
This product is also available at 2 unverified merchants.