Marshall Powercell 2150 - Bright preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 2150 is a 100-watt master-volume combo from Marshall's late-1970s Powercel range. Bright and Normal channels, each with High and Low inputs and its own volume, mix into an ECC83 gain stage that drives the Treble, Middle and Bass stack directly from the plate, then a further gain stage. An ECC83 long-tail inverter with Presence feeds a tandem Master Volume placed after it, driving four EL34s (6550s on US units).

• Made in: UK
• Wattage: 100W
• Channels: 2
• Preamp tubes: 3× ECC83
• Power tubes: 4× EL34

Tags: british, vintage, crunch, el34, high-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.