What tubes does the Airline GIM-9131A - Reverb use?

The Airline GIM-9131A - Reverb uses EL84, EL84 power tubes.

When was the Airline GIM-9131A - Reverb produced?

The Airline GIM-9131A - Reverb was produced 1969–1973.

Airline GIM-9131A - Reverb preset

Close · 68/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Airline GIM-9131A is a Japanese-built Airline model from the post-Valco era, constructed by Matsumoku or a related OEM for Montgomery Ward. It is a hybrid design employing a solid-state preamp with a tube output section, typical of early 1970s budget amp philosophy. The tone is competent and clean, lacking the harmonic depth of the earlier Valco tube designs but offering dependable performance at an affordable price point. These amps are occasionally used today for their EL84 power section, which produces a compressed, slightly bright breakup when pushed.

Years produced: 1969–1973
Made in: Japan
Channels: 2
Power tubes: EL84, EL84

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.