The Quad Stereo Channel (QSC) consists of four stereo channels, with a design based on the Channel module that, however, also borrows some concepts from the Group and the Master modules. The color scheme reflects the same routing of the modules: VCA (red), two effect sends (yellow and green), pan (pink), auxiliary input (purple), and main faders (white).
This peculiar feature set allows you to use the QSC within a standard CGM configuration, or as a standalone stereo mixer with mono effect sends.
Each channel features two amplitude controls: an input stereo VCA and a volume fader. The input VCA is voltage-controllable and, if the signal has enough amplitude, it can overdrive the circuit with a creamy, fat saturation. A peak LED tells when the signal is clipping, but don’t fear cranking it up!
Two unbalanced outputs (left and right) provide the local sum of the four channels. They allow you to use the QSC as a standalone, four-channel stereo mixer in smaller systems or parallel-process a QSC in larger setups.
The yellow and green knobs are two effect sends levels. They can work pre- or post-fader, and two of them can be voltage-controlled for expressive and creative results.
A switch lets you use the panpot for stereo placement or for crossfading between two monophonic sources. This last behavior can lead to using the QSC as a limited but effective eight-channel mono mixer! The first and fourth channels’ pan/crossfade sections can also be voltage-controlled.
The mute buttons allow you to remove a channel from the group sum with a click. The mute function works over the input VCA, so it will also mute the effect sends.
The Solo-In-Place button lets you prepare a “scene” of channels to be isolated from the other ones, and then recall it through the Safe Solo button on the Group module. It can be seen as a mute group function that allows you to mute all the channels outside the solo scene with a click.
Push the PFL button and rotate the PFL fader on the master module to preview a channel: it’s convenient for tuning your oscillators or checking if everything is ok before bringing whatever sound source into the mix.
Two monophonic jack outputs mirror the effect send sum sent to the group. In this way, you can take advantage of the QSC effect sends capabilities even in a compact system, where the group cannot fit. In larger setups, you can achieve some advanced effect routing by processing the same sum in two ways: one from the group and one from the QSC.
Should you run out of channels, the auxiliary mono input lets you add an additional monophonic signal to the final sum: no attenuation, no controls, just a straightforward input circuit!
Channel Family Comparison
CV over VCA
CV over pan
2 (on ch. 1 and 4)
CV over sends
2 (yellow on ch. 1, green on ch. 4)
FX sends per channel
FX sends circuit
Stereo Post-fader local mix
Solo in place
⌀ 20 mm
⌀ 12 mm
⌀ 12 mm
Mono aux in
2 local mono FX sends
|Dimensions||15,6 × 11,7 × 6 cm|
170 mA @ +12 V
170 mA @ -12 V
Recommended warmup time
Audio input impedance
> 10 KΩ (mono)
> 20 KΩ (stereo)
Aux input impedance
Local output impedance
CV Input impedance
> 90 KΩ
Maximum output level before clipping
≥ 17 dBu
Local output gain scale
Local send output gain scale
Send to G/G (2016) gain scale
0.01 to 40 KHz
< 0.3 %
Panpot center position tolerance
< 1.5 dB
Max VCA attenuation
≤ 70 dB
More details on the Manualone.
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.
I want to connect a QSC to my Group module, but the Link cable shipped with the group seems designed for mono Channels. Why? Can I still use it with the QSC?
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.