Kalamazoo Reverb 12 (Version B) preset

verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Kalamazoo Reverb 12 is Gibson's budget-brand reverb and tremolo combo from the late 1960s. It has two Instrument inputs and a Tape/Phono input, with loudness, bass and treble controls. Spring reverb and tremolo (frequency and depth) are footswitchable. Three 12AX7As drive a push-pull pair of 6BQ5 (EL84) output tubes on a solid-state rectifier.

• Made in: USA
• Channels: 1
• Preamp tubes: 3× 12AX7
• Power tubes: 2× 6BQ5 (EL84)

Tags: american, vintage, el84, reverb, tremolo, low-wattage.

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.