What tubes does the Marshall 18Watt use?

The Marshall 18Watt uses 3× ECC83 preamp tubes and 2× EL84 power tubes.

When was the Marshall 18Watt produced?

The Marshall 18Watt was produced 1964–1968.

Marshall 18Watt preset

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

The Marshall 18-Watt combo was produced from 1964 to 1968, using EL84 output tubes and an unusual topology derived from the Watkins Dominator. Its lower power and natural compression made it a boutique favourite long after production ended.

Years produced: 1964–1968
Made in: UK
Wattage: 18W
Channels: 2
Preamp tubes: 3× ECC83
Power tubes: 2× EL84

Tags: british, vintage, boutique, low-watt.

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.