Marshall Jcm800 Series 4210 2205 50Wrvb Combo Head preset

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

The JCM800 Split Channel series (2205, 2210, 4210, 4211) added a second footswitchable channel to the JCM800 platform, providing a clean rhythm channel alongside the signature JCM800 lead voice. Reverb-equipped combos and heads in this range were popular touring workhorses through the late 1980s.

• Years produced: 1982–1990
• Made in: UK
• Wattage: 50W
• Channels: 2
• Preamp tubes: 4× ECC83
• Power tubes: 2× EL34

Heard on: Welcome to the Jungle — Guns N' Roses (1987); Crazy Train — Ozzy Osbourne (1980).

Tags: british, crunch, vintage, 2-channel.

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.