What tubes does the Kalamazoo M2S use?

The Kalamazoo M2S uses 2x 12AX7 preamp tubes and 2x 6V6 power tubes.

When was the Kalamazoo M2S produced?

The Kalamazoo M2S was produced 1965–1968.

Kalamazoo M2S preset

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

The Kalamazoo Model 2S is a small student combo amplifier featuring a tremolo effect, making it one of the more appealing budget options for players wanting onboard modulation in the 1960s. Its simple tube circuit and compact cabinet deliver a chiming, slightly compressed tone typical of small Gibson-derived designs. The Model 2S is popular with collectors as an affordable vintage American combo.

Years produced: 1965–1968
Made in: USA
Wattage: 12W
Channels: 1
Preamp tubes: 2x 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.