What tubes does the Marshall B150 use?

The Marshall B150 uses solid-state preamp tubes and solid-state power tubes.

When was the Marshall B150 produced?

The Marshall B150 was produced 1990s.

Marshall B150 preset

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

The Marshall B150 is a solid-state bass combo from the 1990s, providing 150W of clean bass amplification in a portable floor-standing format. It was aimed at working bass players who needed high-volume output without the weight and maintenance of a valve system.

Years produced: 1990s
Made in: UK
Wattage: 150W
Channels: 2
Preamp tubes: solid-state
Power tubes: solid-state

Tags: bass, solid-state, 90s.

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.