Presently re-jigging my set-up.
I have a NAC72 and NAP140 side by side, and a Hi-Cap2 sitting on top of the NAP140.
A couple of days ago after re-connecting my Hi-Cap2 it was humming.
As it is in a cabinet I cannot hear it and it is not affecting the audio sound.
Also today it has stopped humming. I have read the excellent thread from March 2019 about humming which is mainly a mains issue.
What is the best position for the Hi-Cap2 and should I separate it physically from the NAP140?.
Can also get hum from the HC if the transformer is loose or failing. Have had both faults in the past.
This… is bad. Do not ‘stack’ Naim units. Not recommended.
Any intermittent ‘hum’ is very likely Mains related…
Looks like Project 2 is sorting out my “hi-fi cabinet” (it was planned).
I will reposition the Hi-Cap2 to avoid stacking. Thanks for the advice.
Fully agree with Ian. don’t stack them. Got a photo?
It does sound like an external appliance on your mains may be causing this - or in worst case someone else near your house. If it does it again, turn off all your other circuits and see if you can narrow down the offending appliance.
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