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The Referee delivers a unique tone control through a combination of a high-pass filter, a low-pass filter, and a midrange equalizer. Both filters feature their own resonance control, which allows for a boost at the cutoff frequency, so enhancing the filter effect. The semi-parametric midrange equalizer features a variable frequency control.
This kit contains the PCB and all necessary parts. The enclosure can be selected, please select 6 knobs, up to 19mm diameter, for 6.3mm shaft seperately.
Here is the bill of material: bill of material
This project is by PedalPCBs, in cooperation with Musikding. If you have any problems with the contents of the kit, please contact Das Musikding (Klaus).
Here is the direct link to the manual with layout and schematic:
Instructions
