All About CopperAmps.
Let me guess, CopperAmps is a single, dedicated craftsman hand building electronic works of art in his shop.

Yup!   That's pretty much it.   When you buy a CopperAmps amplifier, you're buying electronics hand made by someone with 40 years of experience in the electronics industry, including military nuclear electronics technician school (USN ETMS school).

"Harmless" Tube-type Stereo Amplifier for Guitar Amp Builders