What tubes does the Gibson GA-55 - Channel 1 use?

The Gibson GA-55 - Channel 1 uses 3× 12AX7 preamp tubes and 2× 6L6 power tubes.

When was the Gibson GA-55 - Channel 1 produced?

The Gibson GA-55 - Channel 1 was produced 1955–1961.

Gibson GA-55 - Channel 1 preset

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

The Gibson GA-55 was a professional-grade combo from the late 1950s offering clean headroom and warm American tone across two channels. It was a favorite among working musicians who needed reliable amplification for a variety of musical settings.

Years produced: 1955–1961
Made in: US
Wattage: 30W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 2× 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.