What tubes does the Gibson GA-8T - Normal use?

The Gibson GA-8T - Normal uses 1× 12AX7 preamp tubes and 2× 6V6 power tubes.

When was the Gibson GA-8T - Normal produced?

The Gibson GA-8T - Normal was produced 1961–1965.

Gibson GA-8T - Normal preset

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

The Gibson GA-8T is a compact combo with tube-driven tremolo, producing around 8 watts from a pair of 6V6 output tubes. Its small size and built-in tremolo made it popular with players who needed a portable, gig-ready amp with onboard modulation. The 6V6 output stage delivers warm, slightly compressed clean tones that break up pleasantly when pushed. The GA-8T is a charming vintage American combo with immediate appeal for studio recording and small venue performance.

Years produced: 1961–1965
Made in: USA
Wattage: 8W
Channels: 1
Preamp tubes: 1× 12AX7
Power tubes: 2× 6V6

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.