Marshall Solid State Bass 100W 2099 - Normal preset

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

The 2099 is a 100-watt solid-state Marshall bass amplifier from the early 1970s, sold in the US through Unicord. Inputs 1, 2 and a combined 1&2 jack feed a pair of 741 op-amps that mix into a transistor gain stage, volume and a bass and treble tone network, with slave and effects outputs. A discrete power amp with MJ3001/MJ2501 Darlington outputs drives a 4/8/16-ohm output transformer, unusual for a transistor design.

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

Tags: british, bass, high-wattage, two-channel.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.