BE2N is a 22HP eurorack module with two specular Benjolins at its core.
It is intended as a redesign strictly for no-commercial use.
Use it to test and expand your soldering abilities and to investigate this circuit incredible sonic capabilities.


The Benjolin designed by Rob Hordijk in 2009, was intended as kit to be used in educational workshops to promote synth DIY. The idea is that people can build a medium complexity electronic circuit in a controlled environment and box it later at home.

tecnical specs

explaination of how the module works.
here are the schematics to understand the circuit and do it by yourself.


Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Public License

[CC BY-NC-SA 4.0]

Authors and credits:

  • To Rob Hordijk creator and original designer of the Benjolin – a mentor and a genuine synth wizard.

  • To Peter Edwards – aka Casper Electronics – for his early and extensive work on the Rungler expansions and mods.
  • To Forest Caver, for his eurorack open source adaptation of the Benjolin which this version is based on.
  • To Derek Holzer from Macumbista for the tip on the Rungler bit out implementation.