THD UniValve 15 Watt Boxed Amp Head NEW 2010s

Brand New
Local Pickup Only
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Local Pickup Only
Gilroy Guitars
Canberra, Australia
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About This Listing

For Sale.... THD UniValve Box-Head Amp

This Head Box is fitted with a THD UniValve 15 Watt Class A amplifier head with a single output tube that can be switched at will among many octalbased power tubes for different tones without re-biasing the amp. Useable tubes include 6L6, EL34, 6550, KT90, KT88, KT77 and KT66 - easily accessible and interchangeable from the rear of the combo cab.

With the amp in “LoV” setting you can use 6V6 for a total output of 5 watts. A special UniValve Yellow Jacket™ Converter is available allowing the UniValve to use the popular EL84 power tube at a total of 4 watts output power, also in “LoV” setting.

Likewise, the two preamp tubes can be any combination of 12AX7, 12AT7, 12AU7, 12AY7 or 12AZ7.

It has a built-in Hot Plate™ Power Attenuator that allows for full output distortion at almost any volume.

The UniValve delivers tones from smooth and clear to very aggressive overdrive. It is easily capable of driving a 4 x 12 cabinet, yet equally at home in THD's 1x12" Combo Cab. CEO Andy Marshall minces no words. "It's one of the best sounding cabinets I've ever heard," he said "It's every bit as full and tight as our 2x12" cabinet, but smaller and it records beautifully."

Full 15 Watts power is available to all speaker selection modes, from 4 to 16 Ohm

Full 12 Months Warranty from date of purchase, on any unlikely repairs on parts and labour... with free return shipping. Warranty does not cover damage, tubes, fuses, or bulbs. 

Available only in Black.

Dimensions of the Headbox:


Tubes - 1x EL34; 2x 12AX7

Large heavy duty rubber feet

User Manual

Australian Power cable

We can arrange for shipping quotations, or you can arrange your own pickup or carrier

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.

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Product Specs

ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more
Made In
  • United States

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