Univox U-235PB preset

Verified · 93/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The U-235PB is a Univox tube bass amp with a 12AU7 preamp, a Sharp/Deep tone switch, treble, bass and volume, and a pair of 6L6GC output tubes on a 480 V supply.

• Made in: Japan
• Channels: 1
• Preamp tubes: 3× 12AU7
• Power tubes: 2× 6L6GC

Tags: japanese, vintage, bass, 6l6.

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.