Jennings Musical Industries AC100/2 preset

Close · 75/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

JMI (Jennings Musical Industries) was the original manufacturer of Vox amplifiers, and the AC100 was their high-powered professional-grade head produced for touring musicians who needed more stage volume than the AC30 could provide. The AC100/2 used four EL34 output tubes to deliver a characteristically British clean and chime at full volume.

• Years produced: 1963–1968
• Made in: UK
• Wattage: 100W
• Channels: 2
• Preamp tubes: 4× ECC83
• Power tubes: 4× EL34

Known for: The Beatles, The Rolling Stones.

Tags: british, vintage, clean, crunch.

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.