Marshall Jcm900 Slx 100W 2100 preset

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

The Marshall JCM900 SL-X 2100 is the 100-watt single-channel flagship of the JCM900 series, delivering the maximum gain output of the JCM900 platform in an assertive, aggressive package. The SL-X name derives from Super Lead Xtra — Marshall's acknowledgement that this amp exceeded the gain levels of the original Super Lead by a significant margin. Its cascaded preamp gain structure, combined with four EL34s in the output, creates a relentless, punishing distortion character that defined the heavier side of 1990s British rock and metal.

Tags: british, 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.