frequency response: 28-150 Hz built-in Class D amplifier delivers 300 watts of continuous power, 600 watts peak power Frequency Filtration Design™ (FFD) technology allows high output levels with low distortion 12" poly-coated fiber cone woofer down-firing 12" 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 gold-plated line-level inputs and outputs LFE input for use with home theater receiver's subwoofer output vibration-reducing conical feet black ash vinyl finish 14-5/8"W x 16-11/16"H x 15-9/16"D weight: 35 lbs.