further developments on this issue ...
Originally Posted by HiFiOutlaw
Hey guys:
Have you Ever come across with something like this...?
http://www.whathifi.com/forum/hi-fi/...buzzing-brio-r
Quote:
Originally Posted by Art K.
Yep, sure have. Truth is, every exceptional amp I've ever owned made noise. The Sonneteer, Unison Research and the Rega Brio-R. Every mediocre one has not. The NAD's, Marantz and so on. Naim is famous for a bit of noise.
When you first plug in a Brio-R you hear the rush of power filling the caps and a hum that subsides very quickly. At this point there is a light hum/buzz that I can hear with my ear about 6 inches from the speaker in a dead quiet room. There is also a low level transformer hum at the amp that you can barely hear with your ear right next to the amp in a dead quiet room.
I'm one picky SOB and if it were audible while I listened to music (at any volume including very low) I would be bothered. It isn't and I'm not. Every amp I've owned that has been able to communicate like the Brio-R has had this kind of noise in common. BTW I mentioned this somewhere in this thread.
The amp has been on without being turned off for a few weeks now I can tell you that besides the Sonneteer (a $2800 amp) I have not owned an amp that allows me into the musical discussion between artists like this one does. The Sonneteer Alabaster was able to do that with just a bit more resolution and I mean just a bit. I couldn't be more satisfied.
A little more info to follow up on what I said about Naim. The following is a quote from the Naim forum admin, Richard Dane;
"High performance toroids, as used by Naim, are very expensive but give unmatched sound performance. If they have a weakness, it's that they can buzz when there is pollution, excessive DC or interference on the mains. Ironically, it seems that the higher the quality of steel (and correspondingly the better sound performance), the more prone a toroid is to buzzing. Naim go to enormous lengths to try to ensure that any possible transformer buzz is minimised, but it's almost impossible to prevent it entirely without compromising the sound performance of the transformer. If you want to know more, ask your Naim dealer to arrange a tour of the Naim factory, where you can learn more about this. They have been working on this issue for as long as they have been fitting toroids to their equipment. I guess they will continue to do so until they find a higher performance alternative."
This has been done to death at the Naim forum and this is not a complete explanation (far more complete ones do exist on that forum) but it is simply a quote I ran across today from Richard. The Naim forum is one of the most tolerant of criticism I've seen from a manufacturer.