Calvin Vai kit

The Calvin Vai is the pedal implementation of the preamp of the Carvin Legacy amp.

The Calvin Vai board features 6 controls - VOLUME, DRIVE, PRESENCE, BASS, MID and TREBLE. With the VOLUME control, the volume of the effect can be adjusted from barely audible to unity gain to a full stadium blast. With DRIVE you can steruate the saturation of the distortion - from delicate crunch to endless leads. The EQ section contains 4 controls - BASS, MID, TREBLE and also PRESENCE. With the first three controls the amount of low, mid and high frequencies, while the PRESENCE control is a fantastic tool to make the guitar heard well in a dense mix.

This kit contains the PCB and all necessary parts. The enclosure can be selected, please select 6 knobs for 6,3mm shaft, up to 19mm diameter, 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:
Building docs