Marshall Valvestate 40 8040 - Normal preset

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

The Valvestate 40 (8040) is a 40-watt hybrid combo from Marshall's first-generation Valvestate range, pairing an ECC83 preamp valve with a solid-state power amp. Normal and Boost channels cover clean and overdriven tones for rehearsals and small gigs.

• Made in: UK
• Wattage: 40W
• Channels: 2
• Preamp tubes: 1× ECC83

Tags: british, hybrid, crunch, mid-wattage, two-channel.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.