• Introduction
  • UniValve Amp
  • BiValve-30 Amp
  • Flexi-50 Amp
  • Hot Plate
  • 2x12" Cab
  • 4x12" Cab
  • Quintet
  • Yellow Jacket
  • Raw Speakers
  • Archives

Welcome to the Literature and Reviews page.

Here you will find an extensive list of product manuals, spec sheets and reviews of our products.

Simply select your product from the tabs above and read away. Most of our literature is in PDF format, so make sure you have the latest version of Adobe Reader. All links open in either a new window or a new web browser tab, depending on your personal browser settings.

Can't find your THD product? We have limited literature on some discontinued THD models. Check under the Archives Tab.

We also have a list of magazine interviews in the Archives!

 

THD UniValve

THD 4x12" Speaker Cabinet

 

Product Reviews:
Guitarhead.net Review (PDF)
This online article reviews both the THD 4x12" cabinet and the Flexi-50 guitar amplifier.

 

 

 

 

 

 

 

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download of Adobe Reader.

THD 4x12"

THD Raw Speakers

 

Reviews:
Guitar Player, Sept. 1994 (PDF)
Review of THD's Longhorn Speakers. This article also features THD's Cotswold Speakers, which we no longer produce.

 

 

 

 

 

 

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download of Adobe Reader.

THD Raw Speakers