Hiwatt Hwpwr100W preset

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

100-watt power amplifier sub-circuit for the Hiwatt DR103. Documents the four-EL34 push-pull output stage that delivers the DR103's extraordinary clean headroom and dynamic response.

• Years produced: 1969–present
• Made in: UK
• Wattage: 100W
• Power tubes: 4× EL34

Known for: Pete Townshend, David Gilmour.

Tags: british, clean, vintage, sub-circuit.

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.