What tubes does the Gibson GA-60 Hercules - Channel 1 use?

The Gibson GA-60 Hercules - Channel 1 uses 3× 12AX7 preamp tubes and 4× 6V6 power tubes.

When was the Gibson GA-60 Hercules - Channel 1 produced?

The Gibson GA-60 Hercules - Channel 1 was produced 1959–1963.

Gibson GA-60 Hercules - Channel 1 preset

Close · 77/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Gibson GA-60 Hercules is one of the more powerful GA-series combos of the late 1950s and early 1960s, delivering approximately 35 watts through four 6V6 output tubes. It is a large, bold-sounding combo built for professional stage work, with the warm American character common to all Gibson GA amps of the era. Two channels provide rhythm and lead versatility. The Hercules name reflected its status as one of Gibson's most powerful and robust combo amplifiers.

Years produced: 1959–1963
Made in: USA
Wattage: 35W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 4× 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.