What tubes does the THD Univalve 1 41 062104 use?

The THD Univalve 1 41 062104 uses 1× 12AX7 preamp tubes and 1× EL34 power tubes.

When was the THD Univalve 1 41 062104 produced?

The THD Univalve 1 41 062104 was produced 1999–2010.

THD Univalve 1 41 062104 preset

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

The THD UniValve is a single-ended 15-watt boutique amp from THD Electronics that shares the BiValve's tube-flexibility philosophy in a single-channel format. Like the BiValve, it accepts multiple power tube types without rebiasing, offering a range of tonal characters from EL84 chime to EL34 crunch in one chassis. The UniValve became a studio and home player favorite for its touch sensitivity and harmonic richness at manageable volumes.

Years produced: 1999–2010
Made in: USA
Wattage: 15W
Channels: 1
Preamp tubes: 1× 12AX7
Power tubes: 1× EL34

Tags: american, crunch, modern.

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.