What tubes does the Gibson GA-77 (1953) - Channel 2 use?

The Gibson GA-77 (1953) - Channel 2 uses 3× 12AX7 preamp tubes and 4× 6L6 power tubes.

When was the Gibson GA-77 (1953) - Channel 2 produced?

The Gibson GA-77 (1953) - Channel 2 was produced 1953–1958.

Gibson GA-77 (1953) - Channel 2 preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1953 Gibson GA-77 was an early version of Gibson's flagship professional combo, establishing the high-powered American clean tone that would characterize the model throughout its run. The 1953 circuit is considered by some collectors to have a particularly warm and organic character.

Years produced: 1953–1958
Made in: US
Wattage: 35W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 4× 6L6

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.