Marshall AS50R - Instrument preset

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

The AS50R is a 50-watt solid-state acoustic combo with separate Instrument and Microphone (XLR) channels, each with its own volume and bass/treble EQ. It adds a BBD chorus and spring reverb, with an LM3886 power amp driving the speaker.

• Made in: UK
• Wattage: 50W
• Channels: 2

Tags: british, acoustic, solid-state, reverb, mid-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.