Marshall G15RCD preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The G15RCD is a 15-watt solid-state practice combo from Marshall's mid-1990s G series. One input feeds a BA4558 op-amp stage with Normal Volume, then a Boost Gain stage with diode clipping, a Contour control, Treble, Bass and Master Volume, all on one signal path. A plug-in spring reverb module with its own level, a tape/CD input, headphone and line outputs complete it, with an LM1875 power amp IC into an 8-ohm speaker.

• Made in: UK
• Wattage: 15W
• Channels: 1

Tags: british, solid-state, practice, low-wattage, 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.