Marshall Haze MHZ40C - Normal preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Haze MHZ40C is a 40-watt all-valve 1×12 combo from Marshall's late-2000s Haze series. The first ECC83 triode feeds a Normal channel with its own volume and voicing switches; for the Overdrive channel a relay-switched JFET brings in a cascaded stage with an Overdrive Gain control. A cathode follower drives a Treble, Middle and Bass stack and an Overdrive Master, then an ECC83 long-tail phase inverter and a fixed-bias pair of EL34s.

• Introduced: 2009
• Made in: UK
• Wattage: 40W
• Channels: 2
• Preamp tubes: 3× ECC83
• Power tubes: 2× EL34

Tags: british, crunch, el34, mid-wattage, two-channel.

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.