Carvin amplifiers have been in the game for a while, they started as the L C Kiesel Company which started in 1946, and produced their first tube amp in 1948 where they were all hand built and wired as standard!
Carvin amps have maintained their high quality manufacture in their factory in San Diego where every amplifier is made in the USA!
We don't see many Carvin amps in for repair because of their build quality and only typically see repairs as a result of wear and tear, such as crackles on controls. Revalving and biasing or faults which have resulted in an accident generally involving beer!!