The new THD Flexi-50™
English overdrive. California clean. Texas punch.

The THD BiValve-30™
Make all of your Tone Dreams come true with the THD BiValve-30™. Great headroom, shimmery highs and tight bass characterize this little monster.

The THD UniValve® Amplifier
The UniValve is a Single-Ended Class A amp head with output tube that can be switched at will among many octal-based power tubes...

The THD Hot Plate®
The award-winning Hot Plate® is the world's most popular power attenuator. It lets you get your amps full of distortion at any volume.

The THD Yellow Jacket® Converters
Yellow Jackets® Converters are a type of specialized tube adapters.

The THD Speaker Cabinet
THD 2-12" Extension Speaker Cabinets