Jim Kelly Jim Kelly Corrected preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

This corrected schematic documents the refined Jim Kelly amplifier circuit, reflecting updates or corrections to earlier documentation of these highly regarded American boutique amps. Jim Kelly built his handmade amplifiers in the 1980s with meticulous attention to clean tonal clarity and session-ready performance. Corrected documentation is particularly valuable for technicians and builders working with these rare amps.

• Years produced: 1980s
• Made in: USA
• Channels: 1

Tags: american, clean, modern.

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.