Marshall Unicord 1959T Circa1970 preset

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

This Marshall was produced during the Unicord distribution era (approximately 1965–1977), when Marshall amplifiers were imported to the United States by Unicord Corporation. Electrically identical to standard UK-market models, Unicord-era Marshalls are sometimes identified by their import labelling. 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.

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.