5.1 home theatre speaker 1.fashion outlook 2.competitive factory price and best ... 5.1 home theatre speaker with usb input 1)Rated voltage:20w ,Center 18w,surround :18w2)Resistance:4Ω,center:4Ω,surround:4Ω ... 3)Driving unit:Front :1*3''+1*1, center: 1*3''+1*1,surround: 1*3''+1*1, ... 4)Frequency range: Front 200Hz-20Hz center: 200Hz-20Hz surround: 20Hz-150Hz5)Sensitivity:≥87dB6)Packing size(L ...