What tubes does the Ampeg V9 use?

The Ampeg V9 uses 6× 12AX7 preamp tubes and 6× 6550A power tubes.

When was the Ampeg V9 produced?

The Ampeg V9 was produced 1971–1975.

Ampeg V9 preset

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

The Ampeg V-9 was the flagship of the V-series guitar amplifier line, an all-tube guitar head producing approximately 300 watts from six 6550A output tubes — essentially the SVT circuit retuned for guitar. Released in the early 1970s, the V-9 was designed for guitarists who needed SVT-level power and headroom for large-stage use, with a guitar-voiced preamp circuit in place of the bass-optimized SVT preamp. The V-9 is extremely rare and is among the most powerful all-tube guitar heads ever produced by an American manufacturer.

Years produced: 1971–1975
Made in: USA
Wattage: 300W
Channels: 2
Preamp tubes: 6× 12AX7
Power tubes: 6× 6550A

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.