Marshall Keyboard Combo 5305 / 5306 - Channel B preset

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

This solid-state Marshall keyboard combo from 1982-83 was rated at 50 watts as the 5305 and 60 watts as the 5306. Channels A and B each have their own 2N3819 FET input, Gain and Treble/Bass EQ on op-amp stages, mixing into a spring reverb with its own level and footswitch jack, an effects send and a Master Volume. A discrete complementary power amp drives a 12-inch or 15-inch speaker plus horn, with a headphone output.

• Years produced: 1982–1983
• Made in: UK
• Wattage: 60W
• Channels: 2

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