Marshall AS80R Pre Amp Lower (AS80-62-02) - Ch1 preset

Close · 70/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Marshall AS50R is an acoustic guitar amplifier combo, designed specifically for amplifying acoustic-electric instruments with clean, transparent preamp channels and built-in reverb. Unlike Marshall's electric guitar amps, it prioritises natural acoustic reproduction and features a tweeter for extended high-frequency response.

• Years produced: 2002–2012
• Made in: UK
• Wattage: 80W
• Channels: 2
• Preamp tubes: solid-state
• Power tubes: solid-state

Tags: acoustic, solid-state, reverb.

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.