Marshall 2203KK Kerry King preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

Marshall's Kerry King signature head, built on the single-channel JCM800 2203 but with four KT88 power valves for a tighter, heavier low end. It adds a gain boost and extra EQ shaping aimed squarely at thrash-metal rhythm tones.

• Introduced: 2007
• Made in: UK
• Wattage: 100W
• Channels: 1
• Preamp tubes: ECC83
• Power tubes: 4× KT88

Known for: Kerry King.

Heard on: World Painted Blood — Slayer (2009).

Tags: british, modern, high-gain, metal, kt88, high-wattage.

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.