frequency response: 30-150 Hz built-in Class D amplifier delivers 250 watts of continuous power, 500 watts peak power Frequency Filtration Design™ (FFD) technology allows high output levels with low distortion 10" poly-coated fiber cone woofer down-firing 10" passive radiator bass-reflex (passive radiator) enclosure continuously variable low-pass 30-150 Hz crossover continuously variable phase control (0-180°) rear mounted volume, crossover, and phase control auto on/off line-level inputs and outputs LFE input for use with home theater receiver's subwoofer output vibration-reducing conical feet black ash vinyl finish 13-1/4"W x 16-1/4"H x 14"D weight: 27 lbs.