Vox Virtuoso preset

Close · 66/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Virtuoso is a 1967 JMI Vox solid-state amp; this drawing is its 15-watt power stage. A 2N3054 driver transistor feeds a driver transformer and two 2N3055 output transistors in a transformer-coupled push-pull stage, with bias presets in each leg, on a split low-voltage supply from a multi-tap mains transformer. A Standby switch and a separate preamp board, made with or without reverb, complete the amplifier.

• Made in: UK
• Wattage: 15W
• Channels: 1

Tags: british, solid-state, vintage, low-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.