What tubes does the Ampeg V3 Preamp Amp use?

The Ampeg V3 Preamp Amp uses 4× 12AX7 preamp tubes.

When was the Ampeg V3 Preamp Amp produced?

The Ampeg V3 Preamp Amp was produced 1971–1978.

Ampeg V3 Preamp Amp preset

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

The V-3 preamp section documents the input and tone-shaping stages of the V-3 PA amplifier. The preamp provides clean, transparent signal conditioning with tone controls before feeding the power amp section. The V-3's clean, neutral preamp voicing made it well-suited to a variety of instrument amplification and PA applications.

Years produced: 1971–1978
Made in: USA
Channels: 2
Preamp tubes: 4× 12AX7

Tags: american, vintage, pa.

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.