Marshall 5150 150W (3315) - Normal preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 3315 and 5150 are 150-watt solid-state Marshall amps from 1988-90, sharing one circuit. Op-amp preamps give a Normal channel with Gain, Treble, Middle, Bass and Volume and a Boost channel with diode clipping and its own Gain, EQ and Volume, switched by JFETs with indicator LEDs. Spring reverb, an effects loop with Balance and Effects Mix, a DI and a Master feed a complementary MJ11015/MJ11016 Darlington power stage.

• Made in: UK
• Wattage: 150W
• Channels: 2

Tags: british, solid-state, reverb, high-wattage, two-channel.

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.