... wooden case subwoofer speaker system Beautiful sound,Paint panel /ABS With USB/SD/MMC With CE ceritificates Specification:Subwoofer output ... power:6W(RMS, fo=100Hz,THD=10% ), 3.5inch, no anti-magneticSatellite output power: 3W*2CH(fo=1 ... : 50Hz-18KHzVolume knob, bass knob, treble knob.Subwoofer size:230(W) X 206(D) X 150 ... B 2.2 CH Wooden case subwoofer speaker system with USB/SD SLOT