What tubes does the Gibson GA-80 Varitone - Channel 2 use?

The Gibson GA-80 Varitone - Channel 2 uses 3× 12AX7 preamp tubes and 4× 6L6 power tubes.

When was the Gibson GA-80 Varitone - Channel 2 produced?

The Gibson GA-80 Varitone - Channel 2 was produced 1959–1963.

Gibson GA-80 Varitone - Channel 2 preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Gibson GA-80 Varitone is a high-powered combo that incorporated Gibson's Varitone tone-switching circuit, borrowed from their Varitone-equipped guitars, for expanded tonal options. Four 6L6 output tubes deliver approximately 40 watts of powerful clean American tone. The Varitone notch filter network provides distinctly different tonal colors at the flick of a switch, making it one of the more unusual and versatile amps in the GA lineup. It is rare and historically significant as an early experiment in programmable amp EQ.

Years produced: 1959–1963
Made in: USA
Wattage: 40W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 4× 6L6

Tags: american, clean, vintage.

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.