Marshall 100W 67 preset

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

The Marshall 1959 Super Lead is the archetypal plexi-era 100W head, produced from 1965 through the JMP era. Four EL34s driving a cathode-follower tone stack deliver the raw, harmonically rich crunch that defined classic rock.

• Years produced: 1965–1981
• Made in: UK
• Wattage: 100W
• Channels: 2
• Preamp tubes: 4× ECC83
• Power tubes: 4× EL34

Known for: Jimi Hendrix, Pete Townshend, Eric Clapton, Jimmy Page.

Heard on: All Along the Watchtower — Jimi Hendrix (1968); Won't Get Fooled Again — The Who (1971).

Tags: british, plexi, vintage, high-headroom.

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.