Gibson GA-400 - Channel III preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Gibson GA-400 is a mid-1960s solid-state-influenced combo that sits at the more powerful end of the GA line. Its 6L6 output stage provides generous clean headroom suited to larger venues. Two channels offer flexibility for rhythm and lead playing. The GA-400 represents Gibson's efforts to compete with the growing market for larger combo amplifiers during the British Invasion era while retaining the warm American tone character the GA series was known for.

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.