Marshall 2046 preset

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

The Marshall JMP Lead Standard is the core JMP-era plexi preamp circuit, shared across 50W and 100W variants, featuring the characteristic four-input, two-channel topology that defined British rock tone through the 1970s. Its cathode-follower tone stack and cascaded triode stages produce the warm, harmonically rich response associated with classic Marshall sound.

Heard on: All Along the Watchtower — Jimi Hendrix (1968); Won't Get Fooled Again — The Who (1971).

Tags: british, vintage, plexi, jmp.

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.