Davoli EL500/504 Amplifier - Normal preset

Close · 79/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Davoli EL500/504 amplifier uses Italian-made EL504 output tubes, which are beam tetrodes related to the EL34 but designed for television sweep and audio output applications. Davoli was one of the few amp manufacturers to make heavy use of these domestic Italian tubes, contributing to the unique sonic fingerprint of their amplifiers.

• Years produced: 1965–1975
• Made in: Italy
• Channels: 1
• Preamp tubes: 2× ECC83
• Power tubes: 2× 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.