Stereo Panning Mixer PCB

From MFOS - A stereo panning mixer with effects sends and returns for your DIY modular synth!

This is for a PCB only, suitable for multiple formats.

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  • Four mono input channels each with Panning, Effect 1 Send and Effect 2 Send.
  • Effect 1 and Effect 2 return can be used as additional stereo line inputs.
  • Two stereo line inputs.
  • Stereo Line Out
  • Integral Stereo Headphone Amp
  • Easy to add additional mono channels with another board.



Who in their right mind would build a mixer when you can buy a nice small mixer for about 40 bucks? I don't know... probably me..., and maybe some other steely-eyed, hard-core, solder junkie, synth-diy'er that's who :-)

A versatile stereo mixer for use with your synth modules. You can easily change gains on the mono input channels to accomodate high-Z microphones (not balanced input mics), electric guitars or other instruments. By adding another board and populating only the mono inputs (or mono inputs and stereo input components) you can add more channels to the audio and effect busses of the first fully populated board. More details on this configuration can be found below.

Specs & Downloads

Specs & Downloads

Manufacturer MFOS
Depth No
+12V No
-12V No
+5V No
Additional Resources Build Guide & BOM


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