What tubes does the Kalamazoo Reverb 12B use?

The Kalamazoo Reverb 12B uses 3x 12AX7 preamp tubes and 2x 6V6 power tubes.

When was the Kalamazoo Reverb 12B produced?

The Kalamazoo Reverb 12B was produced 1969–1970.

Kalamazoo Reverb 12B preset

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

The Kalamazoo Reverb 12B is the final production version of the Reverb 12 series, updated with additional component changes that reflect evolving manufacturing practices at Gibson's Kalamazoo facility. It is largely indistinguishable in tone from the 12A and represents the culmination of the basic Kalamazoo reverb combo concept. The 12B is the most commonly encountered of the Reverb 12 variants.

Years produced: 1969–1970
Made in: USA
Wattage: 12W
Channels: 1
Preamp tubes: 3x 12AX7
Power tubes: 2x 6V6

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.