Gibson Medalist 4/10 - Reverb preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Medalist 4/10 is a late-1960s Gibson amp built as separate preamp and power chassis; its preamp drawing is dated April 1968. Normal and Reverb channels each have two inputs, a presence switch and volume, treble, midrange and bass controls. 6EU7s handle the channel gain stages, a 12AU7A drives the spring reverb, and a 6EU7 oscillator runs a photocell tremolo with depth and speed; reverb and tremolo are both on a foot pedal.

• Made in: USA
• Channels: 2
• Preamp tubes: 3× 6EU7, 2× 12AU7A, 1× 12AX7A
• Power tubes: 2× 6CA7

Tags: american, vintage, clean, reverb, tremolo, el34.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.