Marshall 2000 250W preset

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

The Marshall Major 250W is one of the most powerful tube amplifiers Marshall ever produced, essentially a doubled-up version of the Super Lead circuit running eight EL34 power tubes. Originally designed for large concert halls and outdoor festivals in the late 1960s and early 1970s when PA systems were underpowered, it delivered crushing volume with the same characteristic British midrange aggression as the 100-watt Super Lead. Its sheer power and transformer saturation create a unique bloom and compression at full volume.

• Years produced: 1966–1975
• Made in: UK
• Wattage: 250W
• Channels: 1
• Preamp tubes: 3× ECC83 (12AX7)
• Power tubes: 8× EL34

Known for: Ritchie Blackmore, Pete Townshend.

Heard on: Machine Head (album) — Deep Purple (1972).

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.