I need a few small (but not too small!) Eurorack 4 x 1 DC coupled mixers for my rack.

Many simple commercially available Eurorack synth mixers are extremely small, making it hard to turn the gain up or down, especially with a lot of patch cords in the way.

I designed this module to use dual contentric pots: reasonably large knobs but, in the Eurorack tradition, occupying a relatively small space.

The design utilizes 3 PCB's: main board, jacks, and front panel.

If you fabricate the front panel for the project I'd suggest using black soldermask with white silks, and choose the "leave the build number off" option (costs an extra $1.50).

For alacrity: all parts except for an optional 1206 resistor on the jacks board are through-hole--overall this is a really easy build, it took me about a half hour to build.

For details please see the blog post:

https://audiodiwhy.blogspot.com/2024/09/4-x-1-mono-mixer-confidence-builder.html