Marshall Lead 100 2078 - Channel 1 preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 2078 is a 100-watt solid-state Marshall lead combo with four 12-inch speakers, from the 1970s transistor range. Two channels, each with High and Low inputs, a 741 op-amp stage and its own volume, plus a linked 1+2 input, mix into a BC184 transistor stage feeding Treble, Bass and Middle controls and a master Volume. An echo/slave socket sits before a discrete power amp with Darlington output transistors driving 4 ohms.

• Made in: UK
• Wattage: 100W
• Channels: 2

Tags: british, solid-state, 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.