NAP200 Buzz

Posted by: Mark Carwardine on 21 August 2016

I hear a buzz coming from my (2014) NAP 200 when I turn it on, the buzz does not come from the speakers but the unit itself. Is this normal?

 

Thanks,

Mark

Posted on: 21 August 2016 by MarkJH

Apres moi, Le deluge....

Posted on: 21 August 2016 by Mr Happy

Yes it is normal, assuming its more of a hum than a buzz. Its the transformer. If you do a search there are many posts on the subject.

Posted on: 21 August 2016 by hungryhalibut
Mr Happy posted:

If you do a search there are many posts on the subject.

Hundreds, if not thousands. The search facility is a wonderful thing. 

Posted on: 21 August 2016 by Huge

is it always the same or does it vary from time to time?

If it's constant and unvarying, then that's usually due to the transformer itself.

If it varies, that can be an indicator that the waveform of the mains electricity supply is distorted.
This can either be because a distorted waveform is being supplied to your property, or because of other electrical devices inside your house.

Posted on: 22 August 2016 by Claus-Thoegersen
Huge posted:

is it always the same or does it vary from time to time?

If it's constant and unvarying, then that's usually due to the transformer itself.

If it varies, that can be an indicator that the waveform of the mains electricity supply is distorted.
This can either be because a distorted waveform is being supplied to your property, or because of other electrical devices inside your house.

 

Normally I have no hum but a few days ago all amps and power supplies were quietly humming away, but now they are quiet again, I wonder what happened somewhere else.

Posted on: 22 August 2016 by Sounsfaber

My xps has been humming for 15 years

Posted on: 23 August 2016 by Huge

You'd have thought it'd have learnt the tune by now!