Vox Berkley Preamp preset

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

The preamp section schematic for the Vox Berkley solid-state amplifier, covering the transistor-based input amplification, tone controls, and channel switching. The Berkley preamp represents Vox's engineering of an all-transistor front end designed to approximate the gain and tonal character of the AC series tube preamps without valves. Component values are sized for the relatively low impedance levels required by transistor stages.

• Years produced: 1967–1970
• Made in: UK
• Channels: 2

Tags: british.

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.