Hiwatt 50W Dr504 preset

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

The Hiwatt DR504 is the 50-watt version of the DR103. It shares the same brilliant/normal two-channel topology and point-to-point construction, delivering the classic Hiwatt clean headroom at a more studio-friendly 50 watts.

• Years produced: 1970s–present
• Made in: UK
• Wattage: 50W
• Channels: 2
• Preamp tubes: 4× ECC83
• Power tubes: 2× EL34

Known for: David Gilmour.

Tags: british, clean, vintage, high-headroom.

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.