Humming Speakers

Hi-Fi Corner
1

Good evening everyone.

I have a nait xs2 and bluesound node. When playing it sounds great but when at ‘idle’ there is a hum from the speakers. It increases as you increase the volume of the amp, stays whichever input you select and stops when you disconnect the bluesound. I think I have a ground loop hum!

I’ve searched the net all afternoon and have struggled to find an understandable (to me - being awful at physics) solution. I’m hoping someone else has solved a similar problem?

One thing I have seen is the ‘ground’ plug at the rear of the amp. Would I break the loop by connecting this to an earth i.e use a grounding plug back into the mains?

Any help would be much appreciated.

2

Is it just the Node you have connected to the XS2 - if so take a look here

If you have other items connected what are they ?

3

Hi, its just a Bluesound at the moment. Thats a helpful link - thanks. I wonder what detriment a ground loop isolator will have to sound…and indeed where to buy one! I’ll ask Naim after the Easter Break.

4

If you only have the Bluesound Node connected to the Nait then the issue is not a ground loop - an isolator won’t help here. Adding a connection to mains earth should solve your issue and get rid of the hum. Are you in the UK or elsewhere ?

5

Thanks, I’m in the Uk…

6

Apologies…should I Earth from the bluesound or amp?

7

Either should be fine but to keep it simple you could just use the ground post on the Nait to connect to mains earth.

8

Super. Thanks.

9

Did you get this sorted in the end ?

10

Yes, all sorted. thanks to all. Earthed the amp to the my mains earth, hum went straight away.

11

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