Davoli 1100 B Power Unit preset

verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1100 B is a Davoli (Krundaal) stand-alone valve power unit from 1972, with no preamp or tone controls, fed from a separate preamp module through a multi-pin input socket. One ECC82 is the input stage and phase splitter, with feedback from the output transformer, one ELL80 dual pentode drives the output, and a pair of EL504 TV line-output valves run in push-pull with adjustable fixed bias from a silicon bridge rectifier.

• Made in: Italy
• Channels: 1
• Preamp tubes: 1× ECC82, 1× ELL80
• Power tubes: 2× EL504

Tags: italian, vintage, power-amp.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.