Marshall Series 9000 Handbook - Rhythm 1 (R1 Clean) preset

Close · 62/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Marshall 9001 is a two-channel rackmount tube preamp from the late 1980s, providing clean and lead channels with MIDI-controllable switching for professional live and studio rack systems. It was part of Marshall's Series 9000 rackmount lineup.

• Years produced: 1988–1996
• Made in: UK
• Channels: 2
• Preamp tubes: 4× ECC83
• Power tubes: —

Tags: rackmount, preamp, studio, british.

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.