Mnats Weak Joe Optical Compressor

Projects > Mnats Weak Joe Optical Compressor

The Weak Joe is a tweaked version of the What Compressor many added features. ¬†While the What Compressor was designed with minimal controls for the purpose of being a dedicated vocal compressor, the Weak Joe is a versatile, full-featured optical comp. ¬†Instructions, schematics, and PCB self-etch files are available on the creators’ website.

Notable Features:

  • Option for external sidechain
  • Built-in -3db per octave high-pass filter
  • Control voltage (input or sidechain) LED indicator
  • Attack, release, threshold, ratio, and gain controls
  • Two channels can be stereo linked

More information available at


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