When do the new Atmasphere Class D come out?

@gdnrbob
You may have DC on the line. That produces more of a buzz than a hum.

Try turning off all other electrical circuits in the house and see if it goes away. Fancy light systems like dimmable LEDs or flourescents can do this too.


Best,
E

Thanks Erik,
Ralph and I have been going through just about everything, to no avail.
Everything is quiet until I install the UV-1.
Also, dedicated line to my upstairs system.
Something about my McCormack Micro Power Drives and the UV-1 don't want to work together. The worst part is discounting the buzz, the UV-1 is so much better than my current preamp (an upgraded Micro Line preamp).
Bob

@gdnrbob  Didn't we get that preamp back here for observation? I seem to recall that we did. If so, we might have to get the amp and preamp here at the same time. FWIW the McCormack stuff we've seen here so far has been very competent so I've no reason to expect they would not work together but you never know.

The only thing next to the UV-1 is an Ayre Codex DAC and a LCD monitor.

@gdnrbob, one thing I would certainly try, if you already haven't, is turning off the monitor and disconnecting it from the AC.

Best regards,
-- Al

And the Codex