Marshall Jcm900 Slx 50W 2500 preset

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

The Marshall JCM900 SL-X 2500 is the 50-watt version of the SL-X single-channel high-gain head, using two EL34 power tubes to deliver a more compressed and touch-sensitive version of the SL-X circuit's aggressive character. The reduced output stage makes the 2500 particularly appealing for studio recording where the full 100-watt version's headroom would go largely unused, and many producers noted that the 50-watt version had a more immediate, exciting response under the microphone. The SL-X preamp's gain structure remains identically aggressive regardless of output wattage.

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.