THD is American made tube amplifiers that many “tone dogs” and pros swear by. People have referred to the sound of THD as “the truth” because of the extremely responsive transparent tone. These don’t necessarily make the best amps for beginners since they are very hi-fi and do not pardon sloppy playing. But if you have a great guitar and can play cleanly, then these amps can really bring your tone to life with a smooth, sustaining, musical sound. Blues, rock, jazz, country, and everything in between come through these amps with a very pure authentic tone. No matter how loud you get or how heavy you drive these amps, the clarity of each note is crystal clear. They make incredible studio amps because the richness and depth they bring out can hardly be rivaled by any amp out there. On top of this, their sound is very versatile because of your ability to retube without biasing your amp. This makes it incredibly easy to slip in different tubes and see which you prefer the best. What sound do you want? These amps cover it all if you put in the right combination of tubes. Everything THD puts in their amps is top notch. When you play through one you can see that they are truly the real deal!