Airline GIM-9131A - Channel 1 preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Airline GIM-9131A is a two-channel Montgomery Ward tube combo. Each channel has two inputs, two 12AX7 stages and its own Volume and Tone. The second channel carries the effects: a spring reverb driven by a 6V6 and recovered by a 12AX7, with Reverb Intensity, and a 12AX7 tremolo with Speed and Intensity, each with its own footswitch jack. A 12AX7 inverter drives a push-pull pair of cathode-biased 6L6s off a solid-state rectifier.

Tags: american, vintage, 6l6, reverb, tremolo, two-channel, mid-wattage.

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.