Airline GIM-9151A - Channel 1 preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Airline GIM-9151A is a two-channel Montgomery Ward tube amp head sold with a two-15-inch cabinet. Each channel has two inputs, a 12AX7 stage and its own Volume, Bass and Treble; they mix into a further 12AX7 stage and a 12AX7 phase inverter. Four cathode-biased 6L6s run as two push-pull pairs, each with its own output transformer, off a solid-state bridge rectifier. The Bright switch only dims the panel lamps.

• Made in: USA
• Wattage: 40W
• Channels: 2
• Preamp tubes: 3× 12AX7
• Power tubes: 4× 6L6

Tags: american, vintage, 6l6, 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.