Marshall Silver Jubilee 2555 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 2555 is the 100-watt head of Marshall's 1987 Silver Jubilee anniversary series, with Rhythm and Lead channels sharing one tone stack and independent master volumes. A pull switch adds diode clipping to the rhythm channel and another adds lead-channel gain, and a power switch drops output from 100 to 50 watts. Its smoother, more saturated JCM800-derived voice made it a favourite of Slash, and Marshall later reissued it as his signature 2555SL.

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

Known for: Slash, John Frusciante, Joe Bonamassa.

Heard on: Dani California — Red Hot Chili Peppers (2006); Snow (Hey Oh) — Red Hot Chili Peppers (2006).

Tags: british, crunch, high-gain, 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.