Based on the EQ section of the REVV G3 and G4 present on our Revolution III and IV. Combines a Baxandall section for the bass and treble frequencies with an active mid-control section.
In this project, we have included a Volume trim pot instead of the vol pot on the Revv. This could be bypassed, or you can connect an external pot through the numeric PADS (1, 2/OUT, 3).
For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.