What tubes does the Ampeg V9Pre use?

The Ampeg V9Pre uses 4× 12AX7 preamp tubes.

When was the Ampeg V9Pre produced?

The Ampeg V9Pre was produced 1975–1982.

Ampeg V9Pre preset

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

The V9Pre schematic is an alternate documentation format for the V-9 preamp section. This version may represent a specific production revision or an alternative service document format. Used alongside the main V-9 preamp schematic for complete circuit understanding.

Years produced: 1975–1982
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.