Meth Amp DIY

Meth Amp is based around the fuzz core of the EH Big Muff pedal. The clipping diodes have been replaced by red LEDs to take account of the change in power supply from 9V in the original Big Muff to +/-12V in Meth Amp. To the fuzz core has been added a bunch of OTAs, each controlling a different aspect of audio processing: gain, regen (a new feature – not present in Big Muff), tone and volume. Thereby, each feature is fully voltage controllable. Additionally, there is a separate x100 preamp which can be used to boost external audio for further processing by Meth Amp.

Meth Amp module


Meth Amp0004

Meth Amp PCB set: £20 GBP

Meth Amp panel (12HP): £15 GBP

Build documentation:

Meth Amp Rev.2 Build Doc


Meth Amp Addendum

For orders and queries please contact me at:

[email protected]