Marshall Jcm800 Splitch 4210 preset

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

The Marshall JCM800 4210 is the 50-watt 1×12 combo version of the split-channel JCM800 series, combining clean and lead channels with reverb in a practical combo format. Running two EL34 power tubes, the 4210 offers the tonal virtues of the split-channel circuit with the additional harmonic content of a somewhat smaller, harder-working output stage. The combo configuration and moderate power level made the 4210 an excellent studio and small venue amplifier throughout the 1980s.

Tags: british, vintage, 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.