Univox U-45 preset

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

The U-45 is a small single-ended Univox tube amp: a 12AX7 and a 6AV6 in the preamp, one 6AQ5 output tube and a 6X4 rectifier. It has volume and tone controls, tremolo, and Guitar, Accordion and Aux inputs.

• Made in: Japan
• Wattage: 4W
• Channels: 1
• Preamp tubes: 1× 12AX7, 1× 6AV6
• Power tubes: 1× 6AQ5

Tags: japanese, vintage, tremolo, practice, low-wattage.

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.