Gibson GA-5T preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The GA-5T is a small single-channel Gibson combo with two inputs, a single Loudness control and no tone control. Both halves of one 6EU7 provide the gain; half of a second 6EU7 is a split-load phase inverter and the other half a phase-shift tremolo oscillator with a frequency control and on/off switch. A cathode-biased push-pull pair of 6AQ5 tubes on a 6X4 rectifier gives a few watts into a single speaker.

Tags: american, vintage, tremolo, low-wattage, practice.

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.