Output Power: 20W(10W*+5W*2) Frequency Response: 50Hz - 18KHz Channel Crosstalk: >35dB S/N Ratio: >70dB Product Size Subwoofer: L170*W230 *H220mm Satellite Speaker: L95*W112*H155mm Packing Size: L435*W395*H595mm Packing: 4set/carton Q`TY 20′: 1240set 40′: 2568set 40′HQ: 2640set