Vox AC30 Reverb (1978) - Vib/Trem preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1978 AC30 Reverb comes from the Dallas Arbiter period. Bright (with Top Boost Treble and Bass), Normal and Vib/Trem channels each have high and low inputs and their own volume; the Vib/Trem section has Speed and a vib/trem selector. An ECC83-driven Accutronics reverb has its own volume and footswitch. A Top Cut control and ECC83 long-tailed pair drive four cathode-biased EL84s with no feedback, on a solid-state rectifier.

• Made in: UK
• Wattage: 30W
• Channels: 3
• Preamp tubes: 7× ECC83, 1× ECC82
• Power tubes: 4× EL84

Tags: british, el84, class-a, top-boost, reverb, tremolo.

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.