Marshall 9005 Power Amp preset

Verified · 91/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 9005 is Marshall's stereo valve slave power amp for rack rigs, built as two identical 50-watt sides in one chassis. Each side has its own input with link out and Gain control, an ECC83 long-tail phase inverter and an ECC83 driver feeding a fixed-bias pair of EL34s, with a Presence control and an output power switch between lower-power triode and full pentode operation. Either input can drive both sides for mono use.

Tags: british, power-amp, stereo, el34, high-wattage.

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.