An audible noise inside NAP 250.2

Posted by: palanhifi62 on 10 October 2017

I have a NAP 250.2. The amp make an audible noise inside (like a buzz) when it is running. The noise persists but does go away if I switch the machine off.
I tried to disconnect everything, but the noise is always audible.
Someone has talked to me about Ground Loop, but I have no experience on this topic.

Has anyone experienced this?

Posted on: 14 October 2017 by joe9407

i find these buzz threads puzzling, 'cuz i've now had nine Naim boxes at home -- not a huge number by the august standards of this forum, but a decent sample size -- and have never heard even the slightest sound from the transformers. in fact, i just listened "up close and personal" and all boxes were completely silent.

i wonder if it's the electricity here in NYC. i live in a huge apartment building, so surely someone somewhere should be unleashing some crazy gremlins into the mains -- but nope, no buzzing, ever. (the power here is the most reliable of anywhere i've lived, except after a hurricane, of course.)