Superb Mjolnir Audio Electrostatic (Stax) Valve Headphone Amplifier
These use four 6S4A valves and four ECC83 valves. There are four RCA and four JJ valves in this amp. The serial number is 002 as not many were made and they are now very rare!
This has a great valve sound and better than a standard Stax amplifier sound.