This unique and flexible audio toolbox allows six independent unbalanced audio sources to easily and quietly interface with balanced pro audio systems, either to individual channels or summed down to one master output. The unit shall be capable of operating in four modes: firstly, as six active direct boxes, secondly, as a 6:1 line mixer, thirdly, as a 1:6 line splitter, and fourth, as a 1:6 microphone splitter. It shall be capable of operating concurrently in the first two modes, and there shall be rear panel switches to facilitate the microphone or line splitter mode. There shall be also be a master level control, which operates in all modes. Each channel shall have a high impedance input and output jack, a level control from 00 through to +15dB, and an LED to indicate the onset of circuit overload. Each channel shall have a corresponding electronically balanced XLR output connector, with audio ground lift switch and status LED.