Univox U45B preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Univox U-45B is a bass combo from Univox's mid-tier lineup, producing approximately 45 watts with a circuit voiced for clean, punchy bass reproduction. Its Japanese-built construction and British-inspired tone stack deliver a firm low end with articulate mid-range presence, suitable for both fingerstyle and pick bass playing. The U-45B was sold through Univox's US distribution network and is related in design philosophy to the larger Stage bass models of the same period. It is occasionally used today for its warm, vintage solid-state character and compact form factor.

Tags: british.

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.