APB-DynaSonics' MixSwitch-C is a versatile, multi-channel audio switching and combining system that occupies only 1U of rack space. It is a simplified Contractor version of APB’s proven MixSwitch that is so often used in concert applications. Typical applications include selecting between the Primary console and Backup or secondary consoles, or between Headline and Opening Act consoles in concert/presentation situations. MixSwitch-C also allows for the simultaneous use of both consoles (A+B equally mixed). In demanding club applications, selection between FOH and DJ mixers into a common audio system can easily be performed solving the long found dilemma of who’s equipment is fed directly into the sound system. Each MixSwitch-C unit can control 2 channels of 4 line-level audio signals; Additional units can be added to jointly control additional line level channels such as switching between a pair of consoles with LCR+Sub outputs plus 8 Matrix Channels which would take three MixSwitch units with the first acting as a master and the 2nd two units acting as the expander providing switching of 12 Channel outputs of two consoles. MixSwitch-C is also used as an expander to the full function MixSwitch. Another application of MixSwitch-C is to use a pair of these devices with a standard MixSwitch to select between additional console sources. A MixSwitch-C is plugged into input A and a MixSwitch-C plugged into input B of a master MixSwitch. This allows easy switching between 4 Consoles in a festival or multiple console performance situation while maintaining full talk and music playback inputs as well as an additional 2 Channel input by way of the master MixSwitch device.