Vox AC15 Top Boost Reissue (1996) preset

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

This 1996 AC15 reissue is a Top Boost style valve combo. Both inputs feed one ECC83 input stage and volume, then an ECC83 Top Boost cathode-follower tone stage with Treble and Bass. One ECC83 drives the spring reverb and another pairs reverb recovery with a phase-shift tremolo oscillator (Speed and Depth), before an ECC83 phase inverter with a master level. Two EL84s run cathode-biased Class A from a 5Y3 valve rectifier.

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

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.