5.1 home theatre speaker 1.fashion outlook 2.competitive factory price and best service 3.OEM brand 4.one year warranty Famous 5.1 home theatre speaker with usb input 1)Rated voltage:20w ,Center 18w,surround :18w2)Resistance:4Ω,center:4Ω,surround:4Ω3)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) ...