What tubes does the Gibson GA-50 - Normal use?

The Gibson GA-50 - Normal uses 3× 12AX7 preamp tubes and 2× 6L6 power tubes.

When was the Gibson GA-50 - Normal produced?

The Gibson GA-50 - Normal was produced 1950–1955.

Gibson GA-50 - Normal preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Gibson GA-50 is an early 1950s twin-speaker combo that established the tone template for many later GA models. Driven by two 6L6 output tubes, it produces warm, punchy American clean tones with generous headroom. Two channels offer versatility for different playing styles. The GA-50 was among Gibson's premium amplifier offerings of the era and represents the classic American clean combo aesthetic — big, warm, and articulate with a full low end.

Years produced: 1950–1955
Made in: USA
Wattage: 25W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 2× 6L6

Tags: american, clean, vintage.

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.