Marshall 25Aniv Silverjubilee 50 100W 2555 preset

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

Built for a single year to celebrate Marshall's 25th anniversary, the Silver Jubilee 2555 became an instant legend and one of the most sought-after amps in rock. It features three gain modes - Clean, Rhythm Clip, and Lead - derived from the JCM800 platform but with a sweeter, more harmonically complex overdrive character that split the difference between vintage plexi warmth and 80s high-gain aggression. The Pentode/Triode switch, a first for Marshall, allows the amp to run at half power for even earlier power section saturation.

• Years produced: 1987
• Made in: UK
• Wattage: 100W
• Channels: 2
• Preamp tubes: 3× ECC83 (12AX7)
• Power tubes: 4× EL34

Known for: Slash, Joe Bonamassa, John Frusciante, Rich Robinson, Wayne Krantz.

Heard on: Nightrain — Guns N' Roses (1987); She Talks to Angels — The Black Crowes (1990).

Tags: british, crunch.

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.