Features:12" wooferamplifier power: 50 wattsfrequency response ± 3db: 28hz-160hzinput: high/line leveloutpu: high levelphase switch: 0° /180°level control: variableauto turn on/off low pass slope: 18dbsubsonic filter: 18db@25hzdimensions (hxwxd: 19-7/8" x 13-3/4" x 18-14/25"weight: 0 (lbs)