Marshall Rackmount Poweramp 9005 - Overdrive preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Marshall 9005 is a rackmount valve power amplifier from the late 1980s, delivering 50W per side from EL34 output tubes in a 2U chassis. Designed for use with rack preamps, it was a popular backbone for touring rigs throughout the 1990s.

• Years produced: 1988–1996
• Made in: UK
• Wattage: 100W
• Channels: 1
• Preamp tubes: —
• Power tubes: 4× EL34

Tags: rackmount, power-amp, 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.