What tubes does the Marshall Jcm900 Dualrev 50W 4500 use?

The Marshall Jcm900 Dualrev 50W 4500 uses 4× ECC83 (12AX7) preamp tubes and 2× EL34 power tubes.

When was the Marshall Jcm900 Dualrev 50W 4500 produced?

The Marshall Jcm900 Dualrev 50W 4500 was produced 1990–2000.

Marshall Jcm900 Dualrev 50W 4500 preset

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

The Marshall JCM900 Dual Reverb 4500 is the 50-watt version of the 4100, sharing the same two-channel preamp and reverb circuit but with a reduced output stage for a slightly more compressed, harmonically richer power amp response. Many recording engineers and studio guitarists favored the 4500 over the 4100 for its ability to reach output stage saturation at more manageable decibel levels. The two-EL34 output section responds with a distinctive bloom and give that distinguishes the 50-watt JCM900 from its more powerful sibling.

Years produced: 1990–2000
Made in: UK
Wattage: 50W
Channels: 2
Preamp tubes: 4× ECC83 (12AX7)
Power tubes: 2× EL34

Tags: british, crunch.

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.