Gibson GA-18T Explorer preset

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

The GA-18T Explorer is a single-channel Gibson combo with three inputs, volume, bass and treble, and tremolo with depth and frequency. Two 6EU7 preamp tubes drive a push-pull pair of 6BQ5 (EL84) tubes on a 6CA4 rectifier.

• Made in: USA
• Wattage: 14W
• Channels: 1
• Preamp tubes: 2× 6EU7
• Power tubes: 2× 6BQ5

Tags: american, vintage, clean, tremolo, el84.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.