Input Section of the ToolMix8 analog Summing Box - Analog Summing Gear ToolMix
The picture shows 3 of the 8 input channels of a ToolMix8 analog summing box, each with +/- 20 dB input gain control, insert switch, aux 1 and 2 pots, rotary channel fader and pan-pot, both with calibrated center detent, cut switch, PFL switch and 3-color peak present LED indicator.
analog Summing Box ToolMix8 

ToolMix8 detailed View Input Section