What tubes does the Ampeg G-12 - Channel 1 use?

The Ampeg G-12 - Channel 1 uses 3× 12AX7 preamp tubes and 2× 6L6 power tubes.

When was the Ampeg G-12 - Channel 1 produced?

The Ampeg G-12 - Channel 1 was produced 1961–1966.

Ampeg G-12 - Channel 1 preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The G-12 guitar combo Channel 2 provides a higher-sensitivity input into Ampeg's early 1960s guitar circuit. The warm 6L6 tone with clear note definition made the G-12 a practical choice for guitarists needing a compact, reliable combo. Channel 2 is preferred for hum-bucking pickups and higher-output instruments.

Years produced: 1961–1966
Made in: USA
Wattage: 20W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 2× 6L6

Tags: guitar, american, vintage, low-wattage, 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.