Gibson GA-6 - Channel 1 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The GA-6 is a 1950s Gibson combo with two channels: a high-impedance input on one half of a 12AY7 and three instrument inputs on the other, each channel with its own volume, plus a shared tone control. A 6SL7GT mixes the channels and splits phase for a push-pull pair of 6V6GT tubes on a 5Y3GT rectifier, into one 8-ohm speaker for about 14 watts. Its circuit is essentially the GA-15 with a 12AY7 in place of the 12AX7.

Tags: american, vintage, clean, 6v6, low-wattage, two-channel.

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.