Marshall Marshall Mhz40C preset

Close · 75/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Marshall MHZ40C is a 40W valve combo from Marshall's early 2000s product range, featuring two channels with independent gain, volume, and EQ controls alongside onboard reverb. The EL34 output stage and ECC83 preamp chain give it a traditionally British character, while the modern channel-switching architecture caters to players who need clean-to-crunch versatility without external switching equipment. It represents Marshall's approach to the mid-wattage valve combo market during a period dominated by Fender's Blues series and Vox's AC series.

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.