What tubes does the Gibson Mastertone - Normal use?

The Gibson Mastertone - Normal uses 2× 12AX7 preamp tubes and 2× 6V6 power tubes.

When was the Gibson Mastertone - Normal produced?

The Gibson Mastertone - Normal was produced 1955–1960.

Gibson Mastertone - Normal preset

Verified · 83/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Gibson Mastertone was an early tube amp from Gibson's 1950s lineup, built to complement their archtop and semi-hollow guitars. It delivered warm, intimate tones well-suited to jazz and early blues.

Years produced: 1955–1960
Made in: US
Wattage: 14W
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6V6

Tags: american, vintage, clean.

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.