Unknown Ruby Guitar Amp preset

Verified · 95/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ruby Guitar Amp is a well-known DIY amplifier design that circulated widely in hobbyist and DIY electronics communities, valued for its simplicity and musical results with minimal components. Based on a single-ended design with modest power output, it became a popular first tube amp project for many builders. The circuit prioritizes harmonic character and touch sensitivity over output power.

• Years produced: 2000s

Tags: vintage.

Schematic-derived preset files for 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.