Sansui AU-5900 / AU-6900 / AU-7900 - Left preset

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

The Sansui AU-5900, AU-6900, and AU-7900 were a family of solid-state integrated amplifiers representing the height of Japanese hi-fi engineering in the late 1970s. They were prized for their low distortion, robust power delivery, and exceptional build quality.

• Years produced: 1975–1981
• Made in: Japan
• Wattage: 60W
• Channels: 1

Tags: solid-state, 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.