Univox U-4100 - Bass preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The U-4100 is a solid-state Univox amplifier from 1971 with two channels, Bass and Lead, each with Hi and Lo inputs, driving a transistor output pair. It is a straightforward early-'70s transistor amp aimed at both bass and guitar.

• Channels: 2

Tags: vintage, solid-state, two-channel, bass.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.