Buzzing/humming sound on connection to amplifier.

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    Aled Archer

    The solution the hifi shop gave me which worked was a grounding plug. If you look at the back of your NAIM unit, you should find a grounding plug/point. What the hifi shop did was create a new power plug with just the earth and a UK plug at one end with a hook clamp at the other end to connect to the NAIM amp. With this installed no buzzing or hissing was found at all. Hopefully this solves your issues too.

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    Ian Docherty

    Aled,

    Many thanks for the response.

    Have I understood correctly?

    A single wire, running from the ground screw on the rear of the amp connected to the earth pin on a normal UK mains plug, then plugged into the wall/socket bar to the mains?

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    Ian Docherty

    I contacted Naim and they responded as below, I hope this might be of assistance to others considering combining the Bluesound with Naim products.

     

    Hi Ian
     
    This sounds like an earth hum to me. The Node 2i is a double insulated product, and thusly doesn't require the earth pin on the product end of the power cable. Due to our keen attention to earthing everything in our products, 3rd party products that are double insulated often don't get along with ours due to the difference in earthing techniques. The best way around this would be to invest in a ground loop isolator. This would sit between the XS 2 and the Node 2i, plugged into both, and essentially provides a common earthing point for the two products, which should eliminate the hum.
     
    ​Also if you have anything like a mains conditioning block or a surge protector which the products are plugged into, then it would be worth trying the setup without it, as this can sometimes be the cause of the issue.
     
    Kind regards
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    Tony W. - Product Support Manager

    Well that was a very nice way of suggesting we had an issue that doesn't exist. The NODE 2i simply doesn't require grounding according to our engineering team. Grounding is however why we have the third pin in the POWERNODE 2i.

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    Ian Docherty

    I have no idea who the issue reflects badly on (if anyone). All I know is that I have an annoying humm which I have never had from any other peripheral connected in the same fashion to the amplifier....and the only similar issue reported on here was by someone also with a Naim amplifier.

    I have looked online and researched ground loop isolators online and people suggest they cause more harm (decrease in quality of music) than good (removing the humm) and the feedback from many that were purchased was that they did nothing whatsoever.

    I am new to this ‘streaming lark’...perhaps it’s me!  🎼😃

     

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    Tony W. - Product Support Manager

    Thanks Ian

    Grounding issues can be difficult to find. The last time I moved, I spent way too long (weeks/months) chasing one. It turned out to be the RCA connectors from the turntable to the phone pre-amp. Nothing to do with power what so ever...

    ...and I do this for a living...

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    Ian Docherty

    Thanks Tony, but due to that and other issues concerning the app and lost wi-fi connections I’m going to speak with the dealer it was bought fromwith a view to it going back.

    Life is too short (at my age) to spend lots of time rebooting, turning off and on wi-fi and trying to work out why the app works one minute only to find for some reason it’s all change the next.

    I appreciate your efforts.

    Ian.

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    Tony W. - Product Support Manager

    Ian

    Before you do that, I am escalating your issue. You will hear from one of our Support Crew Members via e-mail today. They can help you troubleshoot.

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    Aled Archer

    Hi Ian

    let me take a photo tonight when i get home and i'll upload for you what the shop made for me. Works a treat. No sound quality loss that my ears can detect. I genuinely think it's a NAIM thing rather than a Bluesound thing as per what the store said to me... It was something that the store already had for demoing their NAIM equipment but not for other makes. I'm in Oz so just bear in mind that when i say 'tonight' it might be different to yours.

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    Ian Docherty

    Hi Aled,

    It appears you are right re being a Naim thing and Naim have said that due to differing approaches to earthing some peripherls don’t like being paired with their products.

    Naim suggested  an earth loop suppressor (no particular one though) but from what I can see online they are at best poor and just decrease the whole signal and at worst, do nothing whatsoever (or maybe that should be rhe other way round.)

    I appreciate the effort.

    Ian.

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    Ian Docherty

    Aled,

     

    This was the response Naim sent me.

    “This sounds like an earth hum to me. The Node 2i is a double insulated product, and thusly doesn't require the earth pin on the product end of the power cable. Due to our keen attention to earthing everything in our products, 3rd party products that are double insulated often don't get along with ours due to the difference in earthing techniques. The best way around this would be to invest in a ground loop isolator. This would sit between the XS 2 and the Node 2i, plugged into both, and essentially provides a common earthing point for the two products, which should eliminate the hum.
     
    ​Also if you have anything like a mains conditioning block or a surge protector which the products are plugged into, then it would be worth trying the setup without it, as this can sometimes be the cause of the issue.
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    Ian Docherty

    Hi Aled,

    I hope you read this before going to too much trouble.

    I collected some new Spendor A4 speakers from my dealer today and mentioned the issue to him (he is also a Naim dealer).

    He showed me a plug with wire attached he uses as you described.

    Bought the necessary stuff on the way home and am now enjoying humm free music on the new speakers via the Node 2i.

    Many thanks for all the effort and advice.

    Ian.

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