What tubes does the Marshall JCM900 2100 use?

The Marshall JCM900 2100 uses 3× ECC83 preamp tubes and 4× EL34 power tubes.

When was the Marshall JCM900 2100 produced?

The Marshall JCM900 2100 was produced 1990–1992.

Marshall JCM900 2100 preset

Verified · 87/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Marshall JCM900 Master Volume 2100 is the 100 W head in the JCM900 Master Volume range (2500/2501/2502/2100/2101). Two ECC83s make up the preamp, with Gain 1 and Gain 2 controls and diode clipping for its distortion. Treble, middle and bass follow. Two footswitchable master volumes and an effects loop are handled by op-amp circuitry. Four EL34s give it a loud, saturated '90s Marshall rock tone.

Years produced: 1990–1992
Made in: UK
Wattage: 100W
Channels: 1
Preamp tubes: 3× ECC83
Power tubes: 4× EL34

Tags: british, high-gain, crunch, 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.