Tech 21 Amps are hand built in New York City using the best materials and exclusive components. Their intelligent design and ingenuity deliver decades of coveted tube amp tones that many players, if blindfolded, would swear is 100% tube. They are, in fact, solid state amps with tube emulation. Of Course, every company that makes solid state gear claims their products sound just like tubes, and actually most of them don’t, but Tech 21 has long had a secret circuit to give their analog boards a realistic tube sound. When you crank up the gain, you get tube-like compression and interesting low and mid frequencies which give it true valve flavor. So come listen for yourself., these amps are very impressive.