Vox AC4TVH preset

Verified · 93/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The AC4TVH is the head version of the AC4TV, for use with an external cabinet. A single input feeds both halves of one ECC83, with a Tone control and a Volume between the stages, driving a single-ended, cathode-biased EL84 in Class A with no negative feedback into a 16-ohm output. A rotary output attenuator drops the power to much lower settings for home use, and the high voltage comes from a solid-state rectifier.

• Introduced: 2009
• Made in: China
• Wattage: 4W
• Channels: 1
• Preamp tubes: 1× 12AX7
• Power tubes: 1× EL84

Tags: british, el84, class-a, 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.