What tubes does the Davoli UP200/3 EL504 Power Unit use?

The Davoli UP200/3 EL504 Power Unit uses 4× EL504 power tubes.

When was the Davoli UP200/3 EL504 Power Unit produced?

The Davoli UP200/3 EL504 Power Unit was produced 1971–1979.

Davoli UP200/3 EL504 Power Unit preset

Verified · 83/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Davoli UP200/3 is a 200-watt modular power unit using EL504 output tubes, the most powerful of Davoli's tube-based power unit range. At this output level it pushed the practical limits of EL504 tube amplification and was reserved for the most demanding professional configurations in Davoli's modular system.

Years produced: 1971–1979
Made in: Italy
Wattage: 200W
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.