What tubes does the Marshall Lead 1987 (1968) - High Treble use?

The Marshall Lead 1987 (1968) - High Treble uses 3× ECC83 preamp tubes and 2× EL34 power tubes.

When was the Marshall Lead 1987 (1968) - High Treble produced?

The Marshall Lead 1987 (1968) - High Treble was produced 1967–1969.

Marshall Lead 1987 (1968) - High Treble preset

Verified · 93/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1968 Model 1987 is the 50-watt plexi Lead head, sharing the 1959 Super Lead's preamp with a pair of EL34s. Its four inputs across Normal and High Treble channels feed a shared Treble/Middle/Bass/Presence stack with no master volume. A silicon rectifier and no master volume mean the amp is at its best cranked, where it delivers classic late-60s British crunch.

Years produced: 1967–1969
Made in: UK
Wattage: 50W
Channels: 2
Preamp tubes: 3× ECC83
Power tubes: 2× EL34

Tags: british, vintage, plexi, 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.