Dukane 1A435 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Dukane 1A435 is an American valve PA amplifier with a single input and gain control feeding two 12AU7s, four triode stages ending in a paraphase-style inverter, with feedback from the output back to the first stage. A push-pull pair of 6CD6G beam tetrodes, with their screens held steady by an OD3 regulator, drives a transformer with 70-volt, 25-volt and 4-16 ohm taps. A 5AW4 rectifier supplies it. It was built for institutional sound systems.

• Made in: USA
• Channels: 1
• Preamp tubes: 2× 12AU7
• Power tubes: 2× 6CD6G

Tags: american, vintage, clean.

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.