What tubes does the Ampeg V3Preamp use?

The Ampeg V3Preamp uses 3× 12AX7 preamp tubes.

When was the Ampeg V3Preamp produced?

The Ampeg V3Preamp was produced 1971–1976.

Ampeg V3Preamp preset

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

The Ampeg V-3 preamplifier section was a two-channel 12AX7-based circuit sharing the core design language of the V-series guitar amplifier line, with normal and bright inputs and a tone stack featuring bass, midrange, and treble controls. The V-3 preamp fed the 6L6GC power stage with carefully controlled drive levels optimized for the amp's 60–75-watt output. As part of Ampeg's V-series of the early 1970s, the V-3 represented a serious guitar amplifier offering from a company better known for bass amplification.

Years produced: 1971–1976
Made in: USA
Channels: 2
Preamp tubes: 3× 12AX7

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.