Marshall JMP Solid State Bass 100W 2099 - CH-1 preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Marshall Model 2099 Super Bass 100W was part of the JMP series aimed squarely at bass players who needed enormous stage volume without breakup. It shares the same chassis and basic topology as the Super Lead but is voiced with a flatter EQ curve, tighter low-end response, and reduced upper midrange emphasis to let bass guitars speak clearly at full power. Despite being designed for bass, it was frequently commandeered by guitarists seeking a cleaner, more headroom-rich platform compared to the Super Lead, and its rugged construction made it a reliable workhorse through the 1970s.

Known for: John Entwistle, Lemmy Kilmister.

Heard on: Ace of Spades — Motörhead (1980).

Tags: british, vintage, crunch.

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.