Output Power: 50W(20W*+15W*2) Frequency Response: 30Hz - 18KHz Channel Crosstalk: >45dB S/N Ratio: >80dB Product Size Subwoofer: L222*W246 *H222mm Satellite Speaker: L116*W122*H116mm Packing Size: L560*W450*H580mm Packing: 4set/carton Q`TY 20′: 767set 40′: 1589set 40′HQ: 1863set