What tubes does the Ampeg Vt120 use?

The Ampeg Vt120 uses 4× 12AX7 preamp tubes and 6× 6L6GC power tubes.

When was the Ampeg Vt120 produced?

The Ampeg Vt120 was produced 1971–1976.

Ampeg Vt120 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg VT-120 was a 120-watt all-tube guitar head from the early 1970s, part of the VT (Vintage Tone) series that combined features of the V-series guitar amplifiers with larger output power. Using six 6L6GC output tubes to reach 120 watts, the VT-120 offered full-stage volume with the warm American tube character of Ampeg's guitar amplifier line. The VT series complemented the V-series models during Ampeg's brief but productive period as a serious guitar amplifier manufacturer in the early 1970s.

Years produced: 1971–1976
Made in: USA
Wattage: 120W
Channels: 2
Preamp tubes: 4× 12AX7
Power tubes: 6× 6L6GC

Tags: american.

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.