JBL S120P II 12" 400-Watt Front-Firing Powered Subwoofer (Black Maple) (Discontinued by Manufacturer) 400-watt powered subwoofer with 12-inch PolyPlas polymer-coated cellulose fiber cone woofer Custom-designed MDF enclosure provides unparalleled spaciousness and definition Low-diffraction baffle reduces distortion; flared port increases bass response without adding boominess 22 to 150 Hz frequency response; continuously variable crossover from 50 to 50 Hz 5-way gold-plated binding post terminals; measures 16.19 x 17.19 x 18 inches (W x H x D); 5-year warranty