The audio distribution system of an active design providing 8 independent channels in a standard 2 unit, 19" rackmount enclosure. Each channel provide two outputs that are actively balanced, and accessible via rear panel XLR connectors, and two that are transformer isolated and accessible via front panel XLR connectors. The input accommodate line level signals of up to +26dBu without clipping. Each channel provide switched gain adjustment in 9 steps via a front panel control, 48V phantom power selectable via a front panel switch, 4 segment LED metering and solo facility via a front panel switch. Phantom power remotely enabled when 48V power is detected on the MON or FOH XLR connectors on the rear panel. The device include a headphone Solo facility via a 1/4 inch phone connector with associated level control. Remote phantom power and front panel phantom power switching disabled via rear panel 'Safe' switches. Ground lift switches disconnect the internal ground connection in two banks (inputs 1-4, 5-8). An 'OB Split' function shall feed input 1 to outputs 1-4 or input 5 to outputs 5-8 via two rear panel switches with front panel indication. The units have the option to have AES digital outputs fitted in addition to the standard analogue outputs. The device provides facility to link the 'Listen' busses together when using multiple devices. The devices powered from an internal power supply, which will operate from an 90-240V 50/60Hz power supply. A single unit capable of providing power to another connected unit via a 5 pin XLR power link cable, and this switch-over shall be automatic with front panel indication of the power supply state.