Davoli 1xxx EL500/EL504 Power Unit (3 versions) preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

A trio of power unit variants in the Davoli 1xxx series utilizing EL500/EL504 output tubes — Italian-made beam tetrodes closely related to the EL34 but optimized for television and audio applications. These modular power stages were at the heart of Davoli's professional amplifier systems, delivering robust output with distinctly Italian voicing.

• Years produced: 1966–1976
• Made in: Italy
• Channels: 1
• Power tubes: 4× EL504

Tags: vintage.

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.