What tubes does the Vox Valvetronix VT50 use?

The Vox Valvetronix VT50 uses 1× 12AX7 preamp tubes.

When was the Vox Valvetronix VT50 produced?

The Vox Valvetronix VT50 was produced 2008–2011.

Vox Valvetronix VT50 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The VT50 is the 50-watt model in Vox's Valvetronix VT line. An op-amp input buffer feeds a codec and DSP that run the amp models and effects, set by Amp Type, FX, Gain, Volume, Treble, Middle, Bass and Reverb knobs with stored channel presets and a Master control. A 12AX7 Valve Reactor stage with transistor drive and op-amp feedback then feeds an STK404 hybrid power IC with a Power Level control, into an 8-ohm speaker with extension out.

Years produced: 2008–2011
Wattage: 50W
Channels: 1
Preamp tubes: 1× 12AX7

Tags: hybrid, modern, mid-wattage.

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.