This little and maybe even a bit mousy looking box, which demands one height unit only, is truly an effective signal distributor, which splits 2 input signals to 4 in stereo mode and spreads 1 input signal to 8 exits in mono mode. As the SD-28 is intended to be used for permanent installation, the particular level regulator has been recessed, to avoid a deliberate or accidental change of settings. The tuning of channels is, by the way, supported by clear LED-meters and therefore facilitated. Additionally, another SD-28 can be connected to improve its field of application. This system control distributor is best used for club installments or for multi stacked amplifiers.