The Tone Guard is a 6 knob optical compressor. It is internally working with 18V, this gives a lot of clean headroom for guitar and bass.
This kit contains the PCB and all necessary parts. The enclosure can be selected, please select 6 knobs for 6,3mm shaft separately.
Here is the bill of material: bill of material
This project is by PCB Guitar Mania, in collaboration with Musikding. If you have any problems with the contents of the kit, please contact Das Musikding (Klaus). For technical problems please contact PCB Guitar Mania: PCB Guitar Mania support.
Here is the direct link to the manual with layout and schematic: