Naim Uniti Nova- noise in headphone stage

Hi-Fi Corner
1

I am getting a “pulsing” or “beating” sound in my headphones along with some static. The setup is a Naim Uniti Nova into Focal Clear Mg headphones. I cannot reproduce this sound through my speakers. Dead quiet even when I turn the volume to 100. My very rough guesstimate trying to count the number of beats is around 400/min. (I am in the US - 60 Hz power)

It occurs regardless of whether any source is playing. I have tested:

  • multiple inputs (Roon streaming via ethernet, turntable and tape into the two RCA inputs, playing radio stations through the Naim app_
  • I varied the ground switch between the floating and default setting
  • I have the unit plugged into a surge protector - I moved it direct to the outlet and also moved it to a different outlet on a different circuit breaker.

Any ideas of potential sources or corrective action would be appreciated.

Thank you
Jay

2

Anything close by such as a wireless router or other wireless products. Do you use any Ethernet over mains wiring devices ?

3

There is a wireless router not far away as that is what the Naim is plugged into for streaming. I will be hooking it up via backhaul but will not be able to do that for about a month. I will still disconnect it later and see if that removes the noise as it occurs even with no inputs. Good idea.

Thank you

4

Yes, try switching the router off or moving it further away. Good luck :crossed_fingers:

5

Thank you sir, that is the source of the noise. I will see if a slight reposition will resolve the issue

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6

Try hard wiring with an Ethernet cable as that should have an affect on possible wireless interference.

7

Thank you, I plan to do that in a few weeks when I have the wiring completed for some house renovatrions

8

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