Vox AC30 Vintage Reverb (1991) - Vib/Trem preset

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

This drawing is the 1991–92 AC30 Vintage model with an added spring-reverb modification. The stock amp keeps the three-channel layout: Brilliant (Top Boost Treble and Bass on an ECC81), Normal and Vib/Trem, each with its own volume, plus ECC83/ECC82 vibrato-tremolo. A Cut control and ECC83 long-tailed pair drive four EL84s with no feedback, on a diode bridge with dropper resistors. The reverb mod adds an ECC81 driver and ECC83 recovery.

• Years produced: 1991–1993
• Made in: UK
• Wattage: 30W
• Channels: 3
• Preamp tubes: 4× ECC83, 1× ECC82, 1× ECC81
• Power tubes: 4× EL84

Tags: british, el84, class-a, reverb.

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.