What tubes does the Vox Pre use?

The Vox Pre uses 3× ECC83 preamp tubes.

When was the Vox Pre produced?

The Vox Pre was produced 1965–1968.

Vox Pre preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Mark III Preamp shared across the Conqueror, Defiant, and Supreme is a tube preamp module driving the Brilliant and Normal channels. It uses ECC83 tubes for the preamp gain stages and feeds the KT88-based power sections of these large-format Vox amplifiers.

Years produced: 1965–1968
Made in: UK
Channels: 2
Preamp tubes: 3× ECC83

Tags: british, vintage, preamp.

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.