What tubes does the Marshall 9004 use?

The Marshall 9004 uses 4× ECC83 preamp tubes and — power tubes.

When was the Marshall 9004 produced?

The Marshall 9004 was produced 1988–1996.

Marshall 9004 preset

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

The Marshall 9004 is a rackmount tube preamp from the late 1980s, offering two independent channels with full EQ and gain control for use in rack-based guitar systems. It pairs naturally with the 9005 power amplifier and was widely used in the era of rack guitar rigs.

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.