Solid output down to 16 Hz, single digit distortion and incomparably low group delay put this amazing subwoofer in a class by itself. The DTS20 is the perfect choice for ultra high-end home theatres, industrial/ military/research facilities, commercial cinemas, mastering facilities, electronic organ reproduction, and commercial surround sound recording/playback. The DTS20 Tower of Power has removable covers that allow two different options for the location of the acoustical output which will be based on the installation orientation you choose.