This module is now discontinued.

It is replaced by Masterone


43 mm deep

62 mA +12V   –   44 mA -12V


The Master module is the last step in a CGM setup, and its main purpose is delivering the audio of the Eurorack system to the outside world.

It consists of three sections: the amplitude control (white), the Headphones/PFL section (blue), and the Auxiliary input (purple).

3.5 mm TRS Pseudo-Balanced Stereo Outputs

Connect two 3.5 mm TS cables to use the outputs as standard unbalanced stereo outputs. If your destination is a balanced system, you can connect two TRS cables and take advantage of the pseudo-balancing, where the ground is connected to both the ring and the sleeve.

Stereo Headphone Output with Pre-Fader Listening

A dedicated fader allows you to monitor the headphones output separately from the master fader. In addition, a crossfader blends the master sum with the PFL section, where you can hear the channels and group set to pre-fader listening.

Auxiliary 3.5 mm Stereo Input

If you need to patch an additional stereo source to your CGM, the auxiliary input has you covered. It features a volume knob and a PFL switch that allows you to pre-listen to its input.

Connecting Master and Groups

See the Link System section.


Our modules are packed with high-quality components that demand a proper power supply and can get sensibly warm.

That is its normal temperature and we can guarantee their performance.

You always need at least one group if you plan to incorporate a master module in your setup. It is not possible to connect any channel module directly to a master module.

The CGM is designed to let you connect up to eight channels (C or QSC) to one group (G), but there is no way of connecting the same channels to two or more groups.

Yes, to take advantage of the Master module’s functions (PFL, headphones, final gain stage), you need at least one group.

We designed the group (G) module together with the classic mono channel (C), which is 6HP wide. After the QSC release, we developed a new Link System with wider plugs that allow you to connect more QSCs in a row.

If you need to connect more QSCs, check your local shop for cable availability!

If you just need to connect a QSC, the classic group-to-channel cable works great, too.

If you experience an abnormal panning on the CGM, check your case’s power supply and your system’s overall power consumption. We experienced that the CGM system sometimes has trouble working in a system close to its maximum Ampère output. An unbalanced power supply may cause the audio to be louder on one channel than on the other.

Try staying below 80% of the total amperage or switch to a more powerful PSU to solve this issue.

Yes! We opened our online store in October 2022. Check out the full catalog!

In Europe, we sell exclusively through our distributor: we do not have access to the individual shops’ orders or stocks.

In the rest of the world, we sell directly to the shops, but even in that case, there’s no way for us to know whether the modules that we’re restocking are sold, available, or reserved for another customer.

We restock every module at least once over a year: we focus on a module’s batch at a time, then we move on to the next one, and so on.

If you want an estimated delivery time for a specific module, drop us a line! We’ll be happy to answer you.

The Mute button closes the first VCA of the channel, thus preventing the sound from being routed through all the other VCAs (FX sends, pan, main fader).

The Solo in Place button isolates some channels and mutes the others. However, the mute function it performs is different since it affects the channel after the fader: the sound will still be routed to any pre-fader VCA such as Direct Output and FX Sends (when set to Pre-Fader Mode).

In other words, the Mute button works pre-fader, while the Solo in Place works post-fader.