Marshall 20 Watt Bass Amplifier Model 2019 preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Marshall Model 2019 is a 20W bass amplifier from the JMP era, sharing its basic topology with other 20W Marshall models but voiced for bass guitar application. It represents the lower end of the JMP power range intended for rehearsal and studio use.

• Years produced: 1967–1973
• Made in: UK
• Wattage: 20W
• Channels: 1
• Preamp tubes: 2× ECC83
• Power tubes: 2× EL84

Tags: british, vintage, bass, low-watt.

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.