UniValve 15 Head Box 15W Tube Guitar Amp

THD created the UniValve 15 head box guitar amp by putting a 15W UniValve in the THD Head Box. It is the same UniValve THD has always made, but is now available in a more traditional head look. The cr¨me vinyl-covered Baltic birch ply cabinet gives a classic look to the award-winning UniValve and provides superior protection for the knobs and switches, both front and back. This THD UniValve 15 Box amp head version is designed to fit perfectly on top of THD's popular 2x12" speaker cabinet, but will be equally at home on any of the popular 2x12" or 4x12" cabinets on the market.

THD UniValve 15W Class A Amplifier Head
The THD UniValve 15W Class A amplifier head delivers tones from smooth and clear to warm and full to aggressive overdrive. The single-ended Class A circuit design uses the highest-quality parts and hand-built construction for clean and faultless operation.

The THD UniValve guitar amp's single output tube can be switched at will with nearly any octal-based power tube for different tones without re-biasing the amp, and the 2 preamp tubes can be switched for any combination of 12AX7, 12AT7, 12AU7, 12AY7, or 12AZ7 tubes.

The THD UniValve guitar amp is easily capable of driving a 4x12" cabinet, yet is also small and light. Its built-in Hot Plate Power Attenuator lets you experience the indescribable freedom of wailing away with full output distortion at volume levels that are quiet enough to let your neighbors sleep.

The THD UniValve guitar amp has 2 inputs”one for high gain and one for low gain. With 12AX7 preamp tubes, the low gain input gives a wide range of sounds from Nashville clean and crisp to Memphis down and dirty. With the controls pegged and a relatively high-output humbucker, the amp head's low-gain input delivers a tantalizing Texas blues overdrive. Plug into the high-gain input for a whole new world”from early British Invasion tones to modern high-gain metal attack”but with none of the mush and confusion normally associated with high-gain tones.

The THD amp's controls include the traditional Volume, Treble, and Bass along with an Attitude control knob that determines how the driver stage responds to signal and how it drives the power tube. The THD UniValve guitar amp also has controls for the Hot Plate, including a hard-bypass switch. The noise reduction circuit in the Hot Plate features a light bulb fixture on the front panel that glows when you play. The tube guitar amp has an On-Off switch for the light bulb.

On the back panel the THD UniValve has a transformer-isolated line out with an adjustable level control and a switch to choose line-level or instrument-level signal. The speaker outs on the THD UniValve guitar amp can drive any speaker load from 2 ohms all the way up to 16 ohms. When there is no speaker plugged into the speaker jack, the 15W guitar amp uses its own built-in dummy load so no damage will occur, and this THD tube amp also awesome for direct recording.

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