What tubes does the Gibson GA-75W - Channel 2 use?

The Gibson GA-75W - Channel 2 uses 3× 12AX7 preamp tubes and 4× 6L6 power tubes.

When was the Gibson GA-75W - Channel 2 produced?

The Gibson GA-75W - Channel 2 was produced 1955–1963.

Gibson GA-75W - Channel 2 preset

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

The Gibson GA-75W was a professional workhorse amp delivering clean, powerful American tones from a quad 6L6 output stage. It was aimed at the working professional who needed reliable volume and warm Gibson tone for club and concert performances.

Years produced: 1955–1963
Made in: US
Wattage: 30W
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.