Mine does not hum. I put a couple of rubber-sorbothane anti-vibration pads underneath the ZRock you might want to give them a try, they're inexpensive:

https://www.supplyhouse.com/DiversiTech-MP-2E-EVA-Anti-Vibration-Pad-2-x-2-x-7-8...

Also, some have found interior parts close to the top of the unit, resulting in a slight buzz or hum. I believe they placed a self adhesive thin layer of rubber underneath to eliminate the problem.

HK

Sounds like I should give Steve a call on Monday..
I’ve been living with it..
It’s really not that annoying, and I thought it might fix itself ..
Not to mention, I am going to have a hard time listening to my system without it..

Hey Delta,

Without going inside yet, I guess you checked to see if it is humming on both channels? Especially if only one channel, could it be an IC on that channel?

Or even if both channels, is it possible one IC pair could be picking up noise from close transformer proximity or from not crossing power cables at a hard angle? Along with Archie's thought about tubes, I wonder if you have a spare set of ICs you can try.

And last, have you tried a different power cord?

If you tried these and more and nothing worked I think that would help Steve help you.

Good luck!

Will

Quote:


Oh I understand now. That does seem to narrow it down to the unit, though I have had noisy tubes cause my CSP3 or Torii to hum more. I have never had a power cord ground issue, but being possible even with new cables, thought it could be worth a try.

Also I used to use an Uber, and though good sounding, still got some transformer hum here. Nice your system is otherwise so quiet.

Hope you get it solved soon!

Will

I had that hum too, this is the thread where I described it: https://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1546294101

My fix was a little piece of rubber between the transformer and the case surrounding it.