brand new naim nait buzzing inside and through speakers

You shouldn't be getting a buzz through the speakers - particularly if you have a signal grounded source such as a Naim CD player etc..  What source do you have connected to the NAIT?

The problem is that I have no source from naim....They are too expensive and I can't afford... just (2 pin electricity cord) arcam rplay... is any different solution ? They say connecting empty RCA to any of the bottom chassis  screw could help but it seems risky - can I make a shrot circuit or damage the equipment?

What advice or help has your dealer offered?

Is your Arcam connected via RCAs or DIN?

He replaced the unit, and told me kind of "this is my problem, maybe I should arrange an electrician"... I use RCA.. the Rplay is not grounded, does it make sense to check RCA to DIN cable? The naim buzzes even when no source is connected

You might want to try an RCA-DIN cable and se whether that improves things. 

have you tried an another el socket (earthed) in different circuit?

thanks for your replies, I did checked different socket in my friends flat, this is kind of the same housing estate the buzz was smaller probably but still present..I checked diferent sockets in my flat - it didnt help..

...and I wouldn't use any of dc blockers- as you called it; they might kill the sound.

cheers

Kacper

buzzing / transformer hum it comes probably from the electric circuit. At the mainboard in your apartment is there differential circuit breaker or not? (Maybe dummy question but In some countries, in some old buildings different solutions are involved).

Cheers

Kacper

Cześć Sławek

What you are hearing is:

1. Buzzing transformer - polluted mains - your household appliances, your neighbours, your block of flats heating pump, etc, et

2. Buzzing from speakers - is your mains earthed properly? In Poland we do get those idiotic hangovers from the past, where the earth pin is joined with the neutral. It's diabolical for NAIM equipment.... I know - I've been there myself. The good thing is - it's curable.

Pozdrowienia,

Adam

There is a circuit breaker but I have no idea if this is "differential". I can see 4 switches 3 for each of the circuit and one probably for all all of them. The buzz is coming from my speakers as well, not only from the inside of the amplifier. Is it possible that they are connected?

slaw posted:

The problem is that I have no source from naim....They are too expensive and I can't afford... j

Slaw you can pick up a really nice Naim cd player on the used market for not too much outlay.... just a thought..   

In my very limited time with Naim I believe a Naim amp goes very nicely with a Naim cd player

Adam Zielinski posted:

Cześć Sławek

What you are hearing is:

1. Buzzing transformer - polluted mains - your household appliances, your neighbours, your block of flats heating pump, etc, et

2. Buzzing from speakers - is your mains earthed properly? In Poland we do get those idiotic hangovers from the past, where the earth pin is joined with the neutral. It's diabolical for NAIM equipment.... I know - I've been there myself. The good thing is - it's curable.

Pozdrowienia,

Adam

Cześć Adam,

I think you might be right. However, I dont want to replace my whole electrical installation at home. 
Can you tell me how to solve the issue then, please?  

Pozdrowienia, 
slawek

slaw posted:

There is a circuit breaker but I have no idea if this is "differential". I can see 4 switches 3 for each of the circuit and one probably for all all of them. The buzz is coming from my speakers as well, not only from the inside of the amplifier. Is it possible that they are connected?

If you are in Poland - all circuits are connected - most likely by the same 3rd phase cable, or worse by the 2nd phase. You are connected to the rest of the people in the same building....

And the internal transformer buzzing and the speaker buzz are linked.

slaw posted:

There is a circuit breaker but I have no idea if this is "differential". I can see 4 switches 3 for each of the circuit and one probably for all all of them. The buzz is coming from my speakers as well, not only from the inside of the amplifier. Is it possible that they are connected?

yes, those 3 probably are for different circuits at your apartment and if the 4th one is the main switcher, there might be no differential circuit breaker.

Adam Zielinski posted:

If you are in Poland - all circuits are connected - most likely by the same 3rd phase cable, or worse by the 2nd phase. You are connected to the rest of the people in the same building....

And the internal transformer buzzing and the speaker buzz are linked.

Adam would almost any amp also buzz not just Naim ?  just curious...

slaw posted:

Adam Zielinski posted:

Cześć Sławek

What you are hearing is:

1. Buzzing transformer - polluted mains - your household appliances, your neighbours, your block of flats heating pump, etc, et

2. Buzzing from speakers - is your mains earthed properly? In Poland we do get those idiotic hangovers from the past, where the earth pin is joined with the neutral. It's diabolical for NAIM equipment.... I know - I've been there myself. The good thing is - it's curable.

Pozdrowienia,

Adam

Cześć Adam,

I think you might be right. However, I dont want to replace my whole electrical installation at home. 
Can you tell me how to solve the issue then, please?  

Pozdrowienia, 
slawek

OK - Sławek - to comply with the Forum rules -  this advice is only valid for Poland and it's based on my experience working with professional electricians, certified for Poland, who installed mains circuits in my flat. Do not attempt to do any work yourself - always work with a professional, certified electrician.

Scenario 1
If your current mains is of an old ex-communist type era, it only has two wires - positive and neutral (blue and brown). The earth pin is connected to neutral or not connected at all, or connected to something else. This is a killer for any Naim amp. In my old flat I solved the problem the following way - I asked my electrician to literally run a length of an earthing wire from the main circuit-breakers to the socket I used for powering my Naim. Problem solved - buzzing from the transformer reduced, buzzing / hissing from the speakers greatly reduced.

Scenario 2
You have a modern Polish circuit - 3 wires, properly terminated.
Transformer buzz:
Start by identifying what else runs on the same circuit that your Naim is connected to. Unplug everything and see what happens to your Nait. If the buzzing is still there, you are picking up your neighbours via the common phase (most likely a 3rd phase).
You could ask your electricians to check if they can switch you to another phase if available.
Speaker hiss: your source is not properly grounded (as you've mentioned it only has a 2-pin connector at mains). Try borrowing a 2RCA > DIN interconnect. This should help. Also make sure your source and your Nait are plugged to the same socket.

At any time - do not run your TV, cable modem, etc on the same circuit as NAIM. They will literally pollute the amp with noise.

Adam

I'm a bit confused . Is this a problem with not grounded Naim RCA inputs and would grounding them somehow help or is it no proper grounding issue in my flat and what is the solution then? 

Anyway, can the buzz damage my speakers when amplifier left on overnights?

Nina, I'm curious if adding any (not properly grounded) equipment to the mix would help...

Nina posted:

Adam Zielinski posted:

If you are in Poland - all circuits are connected - most likely by the same 3rd phase cable, or worse by the 2nd phase. You are connected to the rest of the people in the same building....

And the internal transformer buzzing and the speaker buzz are linked.

Adam would almost any amp also buzz not just Naim ?  just curious...

Nina - I've only experienced buzzing from Naim equipment. Out of all the Naim boxes that I have, only 1 buzzes - a re-capped 555PS non DR

slaw posted:

I'm a bit confused . Is this a problem with not grounded Naim RCA inputs and would grounding them somehow help or is it no proper grounding issue in my flat and what is the solution then? 

Anyway, can the buzz damage my speakers when amplifier left on overnights?

Nina, I'm curious if adding any (not properly grounded) equipment to the mix would help...

Have you read my response above?

Slaw,

I think you should follow the instruction from Adam, - especially if the scenario 1 is involved. Try to find a good electrician or ask the shop if they can help you with that.

Kacper

Seems like we have a little Polish sub-forum here

Thanks for all advice-  from all of you!!! ... If I  had to run the grounding cable through my flat - it would be a real disaster! I'd rather throw the naim out of the window However, I've made a test - I've connected a cable from a spare RCA to a bottom chassis screw and the noise disappeared completelly. I think the problem might be really with the Naim Nait RCA inputs - they are not grounded so the Naim CD player, which is grounded, don't create ground loop with the amplifier. Sooooo bad!

Do you think this is a good way of thinking???

The question is how to ground the RCA without a makeshift/provisoric soultion. Would RCA to DIN help? Well, I'm not so sure - the source is not grounded, the Nait RCAs are not grounded. We just want to ground one or the other... Do you think the IFI Groundhog would help? Could you make another solution?

It it comes to the transformer buzz - It sounds like the Ursus tractor -   well... nothing is perfect... or.....?

Almost there....

Naim sources are grounded properly. So are Naim amps. Naim pays particular attention to ensuring there is one, common grounding through the entire system.

Have a look at this 'article' from Richard:

https://forums.naimaudio.com/to...m-use-din-connectors

As to your 'experiment' - whatever works  

take a deep look to your el socket  and make sure that there is no solution as you can see on the photo. - it's  famous one in old polish buildings - but that's crap in my opinion.

If you haven't any knowledge just call someone (electrician- expert) who can help you with that. Amplifier shouldn't buzz / hum if everything works properly. I have  at home 4 naim devices and and none of those units buzz or hum.