Marshall Silver Jubilee 2550 (25th Anniversary) - Lead preset

Verified · 91/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Silver Jubilee was built in 1987 to celebrate Marshall's 25th anniversary, featuring a hybrid EL34/6550 power section and silicon-diode clipping for extra crunch. Its distinctive silver cosmetics and versatile gain structure made it an instant collector's piece and a potent studio amp.

• Years produced: 1987
• Made in: UK
• Wattage: 50W
• Channels: 2
• Preamp tubes: 4× ECC83
• Power tubes: 2× EL34 + 2× 6550

Known for: Slash, Gary Moore.

Heard on: Paradise City — Slash (1987).

Tags: british, crunch, vintage, anniversary, silver.

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.