Kalamazoo Reverb 12 (Version A) preset

verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Kalamazoo Reverb 12 is Gibson's budget Kalamazoo combo with spring reverb and tremolo, using three 12AX7s and a push-pull pair of 6BQ5 (EL84) tubes for about 12 watts. Controls are loudness, bass, treble, reverb, tremolo frequency and depth, with a footswitch for reverb and tremolo. This is the first (Version A) circuit.

• Made in: USA
• Wattage: 12W
• 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.