What tubes does the Gibson GA-200 - Channel I use?

The Gibson GA-200 - Channel I uses 4× 12AX7 preamp tubes and 4× 6L6 power tubes.

When was the Gibson GA-200 - Channel I produced?

The Gibson GA-200 - Channel I was produced 1959–1967.

Gibson GA-200 - Channel I preset

Close · 75/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Gibson GA-200 is a high-powered twin-speaker combo amplifier, delivering approximately 90 watts through four 6L6 output tubes into a dual-speaker cabinet configuration. Designed for professional stage use in large venues, the GA-200 provides massive clean headroom and a wide, dimensional stereo-like spread from its twin speakers. Its four-tube output section produces rich, full-bandwidth American tone with exceptional presence and authority — making it one of the most impressive amplifiers Gibson ever produced.

Years produced: 1959–1967
Made in: USA
Wattage: 90W
Channels: 2
Preamp tubes: 4× 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.