Burman Pro 501 Preamp preset

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

The Burman Pro 501 Preamp was a respected British solid-state preamplifier used for both guitar and studio applications in the late 1970s. Its clean headroom and comprehensive EQ controls made it a versatile tool for professional players.

• Years produced: 1976–1985
• Made in: UK
• Channels: 2

Tags: british, 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.