Gibson Reverb 12 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Reverb 12 is a single-channel 1960s Gibson combo with two instrument inputs and a tape/phono input, loudness, bass and treble controls, spring reverb with a level control, and a phase-shift tremolo with frequency and depth, both footswitchable. Three 12AX7s handle the preamp, tremolo oscillator, reverb drive and recovery; a split-load inverter drives a cathode-biased push-pull pair of 6BQ5 (EL84) tubes on silicon diodes, about 14 watts.

• Made in: USA
• Wattage: 14W
• Channels: 1
• Preamp tubes: 3× 12AX7
• Power tubes: 2× 6BQ5

Tags: american, vintage, clean, reverb, tremolo, el84.

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.