Univox Stage 740P - Channel 4 preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Stage 740P is a solid-state Univox PA head from 1976, built by Unicord. Four input channels each have their own transistor preamp with bass and treble, a volume control and a reverb send switch. They mix into a master volume with a transistor-driven spring reverb and its own level control, plus a monitor output. A quasi-complementary transistor power amp feeds two speaker outputs. The drawing's 130-watt figure is its mains rating.

• Channels: 4

Tags: solid-state, multi-channel, vintage.

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.