The CGM module Master sums all stereo signals of the connected Group modules and their aux returns. The sum output are the two white marked sockets on top.
The final level of the Master is adjusted with the big potentiometer. Two LED chains form the VU meter, displaying L and R signal levels.
The blue marked section is the PFL (pre fader listening), its stereo signal being output at the 3.5mm headphone socket above the VU meter. The PFL volume is set with the lower blue potentiometer while the upper one blends between man mix (white) and PFL (blue).
Marked in purple is a stereo aux input that's gain is controleld with the "purple" potentiometer. The blue highlighted button sends the aux input signal to the PFL headphone mix.
For understanding: a Master is only necessary if several Group modules are to be summed to one stereo mix.
The PFL function available for each Channel and each Group is activated only with the Master module using its headphone output.
Contained is a Link Cable for connecting one Group module to one Master. Optionaly available are cables for connecting up to four groups.
aux input (stereo), stereo output, left mono output, right mono output
3U Eurorack module, 6HP wide
maximum current draw: 101mA at +12V and 85mA at -12V