Marshall JVM410H - OD1 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The JVM410H is the 100-watt four-channel flagship of the JVM series introduced in 2007. Clean, Crunch, OD1 and OD2 each have their own Gain, Volume, Treble, Middle and Bass and three footswitchable modes, switched by relays under microcontroller and MIDI control. Four ECC83s form the preamp, with per-channel reverb, two masters and a series/parallel loop; an ECC83 inverter with Presence and Resonance drives four EL34s, with a line out.

• Years produced: 2007–present
• Made in: UK
• Wattage: 100W
• Channels: 4
• Preamp tubes: 5× ECC83
• Power tubes: 4× EL34

Known for: Joe Satriani, Dave Mustaine, Michael Amott, Alexi Laiho.

Heard on: Yesterday Is Dead and Gone — Arch Enemy (2011); Under Grass and Clover — Children of Bodom (2019).

Tags: british, crunch, high-gain, el34, high-wattage, multi-channel, reverb.

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.