What tubes does the Marshall 4140 use?

The Marshall 4140 uses 4× ECC83 preamp tubes and 4× EL34 power tubes.

When was the Marshall 4140 produced?

The Marshall 4140 was produced 1981–1990.

Marshall 4140 preset

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

The Marshall JCM800 4140/4145 Club & Country is a stereo reverb combo from the early JCM800 era, featuring two channels and a built-in spring reverb system in a large dual-speaker combo format. It was aimed at country and club players who needed a clean platform with reverb rather than high-gain performance.

Years produced: 1981–1990
Made in: UK
Wattage: 100W
Channels: 2
Preamp tubes: 4× ECC83
Power tubes: 4× EL34

Tags: british, combo, clean, reverb, jcm800.

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.