... 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 ... voltage:80w9)Driving unit:8''10Packing size(L*W*H):310*460*490mm/1pcs11)With FM/USB/SD card reader,12 ...