Marshall JCM800 2203 Reissue preset

Verified · 93/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The JCM800 2203 reissue is Marshall's modern reproduction of its classic 1980s 100-watt single-channel master-volume head. Three ECC83s drive a cascaded gain channel with gain, bass, middle, treble, master volume and presence into four EL34s, and the reissue adds a series effects loop and impedance selector. It delivers the aggressive, mid-forward British rock and metal crunch the original is famous for.

• Years produced: 2002–present
• Made in: UK
• Wattage: 100W
• Channels: 1
• Preamp tubes: 3× ECC83
• Power tubes: 4× EL34

Known for: Lee Kiernan, Gregg Barnett, Lzzy Hale, Lee Malia.

Tags: british, reissue, el34, high-wattage, crunch, high-gain.

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.