What tubes does the Marshall JCM800 2204 use?

The Marshall JCM800 2204 uses 3× ECC83 preamp tubes and 2× EL34 power tubes.

When was the Marshall JCM800 2204 produced?

The Marshall JCM800 2204 was produced 1981–1990.

Marshall JCM800 2204 preset

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

The JCM800 2204 is the 50-watt single-channel master-volume head that defined 1980s British rock tone. Cascaded ECC83 gain stages with a master volume after the tone stack let it overdrive at controllable volumes, and two EL34s give a tight low end and cutting midrange.

Years produced: 1981–1990
Made in: UK
Wattage: 50W
Channels: 1
Preamp tubes: 3× ECC83
Power tubes: 2× EL34

Tags: british, crunch, high-gain, el34, mid-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.