Connectors - Couple Port in Summing Mixer ToolMix16
Analog Summing Gear ToolMix
Detailed view of the Couple Port, used for linking with other ToolMix / ToolMst devices and of the Master Switch that selects between master and slave operation of the device.
Summing Mixer ToolMix16 XLR Pinning Couple Port  Total View Rear Panel