Univox Stage 720K preset

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

The Univox Stage 720K is a solid-state keyboard and guitar amplifier from Univox's Stage series, designed to handle a variety of instrument inputs. These larger-format combo amps provided versatile amplification for keyboard-based bands and multi-instrumentalist setups of the 1970s.

• Years produced: 1970s
• Made in: USA
• Channels: 2

Tags: american, vintage, solid-state.

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.