Model :P400 Specifications: Output Power:23W(3W*5+18W*1) Frequency Response:50Hz - 20KHz Channel Crosstalk:>45dB S/N Ratio:>75dB Per Satellite Speaker:40*70full-range driver*2 Subwoofer Speaker:4 Woofer*1 Product Size: Subwoofer:W135*H250*D320mmBR> Satellite Speaker:W80*H270*D80mm Packing Size:L665*W388*H278mm Packing:2 set/carton Q`TY 20′:884set 40′:1836 Sets 40′HQ:2064set