What tubes does the Univox 1236 - Bass use?

The Univox 1236 - Bass uses 12AX7, 12AX7 preamp tubes and EL34, EL34 power tubes.

When was the Univox 1236 - Bass produced?

The Univox 1236 - Bass was produced 1971–1975.

Univox 1236 - Bass preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Univox 1236 is a higher-output model in the 1200 series, delivering approximately 40 watts with a full-featured tube circuit including reverb, tremolo, and a three-band EQ. Its British-voiced character emphasizes upper-mid frequency content and natural valve compression, giving it a warm, musical quality at stage volumes. The 1236 was among the more capable models in the 1200 series and targeted the semi-professional or working gigging musician who needed reliable performance on a budget. It compares favorably with entry-level Vox and early Marshall designs in terms of basic tonal character.

Years produced: 1971–1975
Made in: Japan
Wattage: 40W
Channels: 2
Preamp tubes: 12AX7, 12AX7
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.