This is an experimental circuit using an op amp in non-inverting configuration with rf as a 4.7K potentiometer and a npn bi-polar transistor. 

This is the first guitar pre-amp circuit I have ever created, and the first circuit i have ran a guitar signal through directly from a guitar.

The circuit is outputted to a small power amplifier then into a Marshall 1936 Guitar cabinet.

Amp Circuit 01 Audio

Live guitar into the designed and created FET amplifier 

Amp comparison - FET guitar

Amp comparison - 8008 guitar

Audio being played through the designed FET amplifier. Ausio by "Blood for Blood", the track is "Runaway" from their serinety album. 

Amp comparison - FET Runaway

Audio being played through the Marshall 8008 amplifier. Ausio by "Blood for Blood", the track is "Runaway" from their serinety album. 

Alex Audio