Univox Stage 750B preset

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

The Univox Stage 750B is a bass-specific amplifier from Univox's Stage series, delivering approximately 50 watts through a solid-state or hybrid circuit optimized for low-frequency reproduction. Its design prioritizes clean, extended bass response with a defined low-mid punch that complements the articulate playing style of early 1970s bass technique. The British-influenced tone voicing gives the upper harmonics a defined, present quality that aids note clarity in live settings. The Stage 750B was distributed in the US by Merson and is a representative example of Japanese-built budget bass amplification of the early 1970s.

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.