Marshall JMP Mercury 2060 preset

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

The Mercury 2060 is a small 5-watt hybrid combo from Marshall's JMP era, one of its entry-level practice amps. High and Low inputs feed a BC184 transistor stage with Volume, a Tone control and a second transistor stage, then a single-ended EL84 output valve on a single-diode supply into a 4-ohm speaker. A third transistor runs a phase-shift tremolo oscillator with Speed and Intensity, switchable by footswitch.

• Made in: UK
• Wattage: 5W
• Channels: 1
• Power tubes: 1× EL84

Tags: british, vintage, low-wattage, practice.

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.