Marshall Super Lead 1959 (1968) - Normal preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1968 Marshall Super Lead 1959 is the classic plexi-era 100-watt head: Normal and High Treble channels (two inputs each) share a V1 ECC83, followed by a gain stage and cathode follower into a treble/bass/middle stack, a long-tailed-pair phase inverter with presence, and four EL34s on a solid-state rectifier. There is no master volume, so it gets its famous crunch by being turned up loud. It defined the late-1960s hard rock sound.

• Years produced: 1967–1969
• Made in: UK
• Wattage: 100W
• Channels: 2
• Preamp tubes: 3× ECC83
• Power tubes: 4× EL34

Known for: Jimi Hendrix, Eddie Van Halen.

Heard on: Eruption — Van Halen (1978); Star Spangled Banner (Live at Woodstock) — Jimi Hendrix (1969).

Tags: british, vintage, plexi, el34, high-wattage, two-channel, crunch.

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.