What tubes does the Ampeg M-12A - Channel 1 use?

The Ampeg M-12A - Channel 1 uses 2× 12AX7 preamp tubes and 2× 6V6 power tubes.

When was the Ampeg M-12A - Channel 1 produced?

The Ampeg M-12A - Channel 1 was produced 1962–1966.

Ampeg M-12A - Channel 1 preset

Verified · 83/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg M-12A Mercury was an updated variant of the Mercury series guitar combo, incorporating circuit refinements from the original M-12. The Mercury series provided a balance between the compact Jet format and the larger Gemini models, making it a practical all-purpose guitar combo for working musicians. The M-12A maintained the warm, clean 6V6-powered tone that characterized Ampeg's guitar lineup during the early 1960s.

Years produced: 1962–1966
Made in: USA
Wattage: 18W
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6V6

Tags: american, vintage, clean.

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.