A plug is plugged into the speaker jack to a PC or TV, a connected to the subwoofer and the cable to the mains. At a box is the on / off switch as knobs for volume. The shiny black color assumes no dirt. The speaker output is so loud that they are determined not want to turn up the volume. The knob on the subwoofer is mounted on the rear side. Set at the third mark of 9 can be sufficiently heard well tailored language and supported bass. The bass performance is so enormous that it was never turned over half.