Description

This is a very reluctant sale.
This is the best built amp I've come across.
This example is in excellent condition and has never been gigged
Thomann amp head bag included.

I have a selection of used but good preamp and power tubes that I can do a deal on if buyer is interested. (Note: these are NOT included in the asking price)

The highlights are;
Exceptional build quality
Non biasing, allowing the "hot swap" of preamp and power tubes.
Line out for recording.
Built in attenuation (via THD hotplate)
Takes 2, 4, 8 or 16 Ohm speaker load.

More comprehensive details below:

The THD Univalve is a 15-watt, single-ended, Class-A guitar amplifier head known for its ability to hot-swap power and preamp tubes without re-biasing. It features a built-in Hot Plate attenuator, a transformer-isolated line out, and a "light bulb" noise reduction circuit, delivering tones from clean to high-gain.

Key Technical Specifications

Output Power: Nominal 15 Watts RMS.

Output Tubes: Single-ended design supporting EL34, 6L6, 6550, KT88, KT77, KT66, and 6V6 (with voltage adjustment).

Preamp Tubes: 12AX7, 12AT7, 12AU7, 12AY7, 12AZ7.

Impedance: 2, 4, 8, or 16 ohms (via switch).

Controls: Volume, Treble, Bass, Attitude, and a Master Volume/Attenuator (Hot Plate).

Inputs: Dual Inputs - "More" (high gain) and "Less" (bypasses first gain stage).

Outputs: Speaker out, Transformer-isolated Line Out with level control.

Construction: Self-biasing circuitry, steel chassis with protective cage.

Features

Hot Plate Attenuator: Built-in attenuator for full power distortion at low volumes.

Light Bulb: Acts as both a power indicator and a compression/noise-reduction circuit.

Line Out: Switchable line/instrument level for direct recording or slaving.

The Univalve was manufactured to allow for extensive tone shaping by simply changing power tubes to alter the voice of the amp, ranging from British (EL34) to American (6L6/6550) styles.