Hiwatt Hwpsu3 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

Power supply sub-circuit schematic (section 3) for the Hiwatt DR series. Covers the heater supply and standby switch circuitry for the DR103/DR504 amplifier.

• Years produced: 1969–present
• Made in: UK

Tags: british, vintage, sub-circuit, power-supply.

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.