Airline GIM-9171A - Channel 2 preset

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

The Airline GIM-9171A is the largest of the GIM series Montgomery Ward tube amps. Each of its two channels has two inputs, two 12AX7 stages and its own Volume and Tone. Channel 2 carries a 6V6-driven spring reverb with Depth and a 12AX7 tremolo with Speed and Intensity, both footswitchable. A 12AX7 phase inverter drives four cathode-biased 6L6s as two push-pull pairs with separate output transformers, into a cabinet of four speakers and a horn.

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