What tubes does the Univox Stage 740P use?

The Univox Stage 740P uses EL34, EL34 power tubes.

When was the Univox Stage 740P produced?

The Univox Stage 740P was produced 1969–1973.

Univox Stage 740P preset

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

The Univox Stage 740P is a mid-to-high power Univox combo from the late 1960s to early 1970s, featuring a solid-state preamp with a tube power section — a hybrid approach common in transitional-era Japanese amp design. It targets the working rock musician needing reliable stage volume and a forward, cutting mid-range character reminiscent of British valve designs. The British-influenced voicing gives the tone stack a presence-forward quality that cuts through dense band mixes, making it functional for rhythm and lead guitar roles. The Stage series represents Univox's push toward the professional market during its most commercially active period.

Years produced: 1969–1973
Made in: Japan
Wattage: 40W
Channels: 2
Power tubes: EL34, EL34

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.