Marshall 5506 Bass 60 preset

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

The Model 5506 is a 60-watt solid-state Marshall bass combo from 1982-83 with a 15-inch speaker, an affordable practice and small-gig bass amp. A 2N3819 FET input with Sensitivity and Contour controls feeds CA1458 op-amp EQ with four bands at 50 Hz, 400 Hz, 1 kHz and 10 kHz, then a diode-limited Volume, effects send/return and DI output. A discrete transistor power amp delivers 22 V into 8 ohms.

• Made in: UK
• Wattage: 60W
• Channels: 1

Tags: british, bass, solid-state, mid-wattage.

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.