Humming ,buzzing Brio r

Fri, Feb 17 2012, 12:23PM

#1

domenn

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Posts: 126

what I noticed at the shop was that the humm was not so loud maybe because they are using expensive main blocks and cables . and WHF maybe keep original power cable for review but the rest is high quality block .......

but you are absolutely right for 500 £ it should not be there . I used to have speakers on my pc desktop and once I noticed that hummbuzz I couldn't get it out of my head , pretty annoying

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Sun, Feb 19 2012, 10:22AM

#2

gavinsim

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Joined: 11 Jun 2005

Posts: 17

RE: Humming ,buzzing Brio r

I had a problem with mine humming see link

http://www.whathifi.com/forum/hi-fi/speakers-started-to-humm

I ended up just keeping it as it was not noticeable when listening... but you can still hear it if you are reasonably close to the speaker

Thu, Feb 23 2012, 4:00PM

#3

BrooklynHiFi

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Joined: 23 Feb 2012

Posts: 1

RE: Brio-buzz-killer

I've just purchased a Brio-R based on reviews in this publication and love the sound but after a few days, a faint but very audible buzz emerged. I find it pretty hard to imagine the company just letting that go but it appears they've comprised and hope that folks won't mind.

I do love the sound and am debating whether to just put up with the buzz or return it and go in another direction. It's so annoying, the pitch gets into my head and I end up obsessing. A great amp should at minimum run quietly.

Has anyone out there compared the new Marantz PM8004 vs Rega Brio-R? I'd be really curious and appreciate some feedback.

Thus far the buzz is definitely a buzz-killer...

Thu, Feb 23 2012, 5:25PM

#4

npoguy

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Joined: 22 Apr 2011

Posts: 20

RE: Humming ,buzzing Brio r

I recently purchased a demo version of the Brio-R here in the States. I've had it for a couple of weeks with no buzzing or humming, but I'm definitely concerned. BTW, the little guy sounds terrific with my Salks--maybe a little under-powered, but still very nice.

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Fri, Feb 24 2012, 9:34PM

#5

brekhof

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Joined: 24 Feb 2012

Posts: 1

RE: Humming ,buzzing Brio r

Got the same problem.

In the end it was a SBT problem.

It is extremely sensitive fot strong magnetic fiels.

Have a realy powerfull amp (large coils).

On top of the amp there was always a buzz , humm, music terible.

I could not find a cause for the problem until i lifted the SBT from the amp during a song.

A take some precautionary masures and for now the prblems are solved....

Took me ages

Greetz Henk

Mon, Feb 27 2012, 9:14AM

#6

mykspence

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Joined: 12 Feb 2011

Posts: 181

RE: Humming ,buzzing Brio r

Sizzers wrote:

No, it's humming.

I'm writing to Rega over the weekend citing this post amongst other things. This just shouldn't be happening with a £500 amp. It doesn't spoil the SQ but it is annoying that I have to keep remembering to switch it off and I have only had it for less than a day!

Hi Sizzers, any outcome on this? I'm about to buy one after a dem and although the demo unit was quiet, these stories have me a little converned.

Cheers

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Mon, Feb 27 2012, 9:20AM

#7

chebby

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Posts: 13214

RE: Humming ,buzzing Brio r

mykspence wrote:

...the demo unit was quiet, these stories have me a little converned.

Buy the demo unit.

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Mon, Feb 27 2012, 9:32AM

#8

mykspence

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RE: Humming ,buzzing Brio r

chebby wrote:

Buy the demo unit.

It's the wrong colour.

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Mon, Feb 27 2012, 10:20AM

#9

Sizzers

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Joined: 20 Jun 2008

Posts: 1413

.

mykspence wrote:

Sizzers wrote:

No, it's humming.

I'm writing to Rega over the weekend citing this post amongst other things. This just shouldn't be happening with a £500 amp. It doesn't spoil the SQ but it is annoying that I have to keep remembering to switch it off and I have only had it for less than a day!

Hi Sizzers, any outcome on this? I'm about to buy one after a dem and although the demo unit was quiet, these stories have me a little converned.

Cheers

I wrote to Rega last Monday detailing the problem and pointing them to this post here, and this is a copy of the relevant part of their initial reply:

The e mail quoted on the What HiFi Forum unfortunately is taken completely out of context.

Any amplifier employing a torroidal transformer, by definition, is occasionally prone to extraneous noise generated by the high voltages therein especially in a smaller case with higher wattage output.

Essentially it is a trade off for absolute performance against physical size which is why we deliberately orientate every transformer on the production line for absolute quietest performance.

In 99.9% of applications any such noise is completely inaudible but there are other factors that can make the transformer more susceptible to noise. Any variation in the quality of the incoming mains supply, either peaks or dips, can make the transformer work harder and induce noise into the circuit.

Also other domestic appliances such as fridges, freezers, boilers, washing machines etc that employ switches can corrupt the mains supply.

Computers that employ sophisticated mains filters that reject polluted mains then return them to the mains supply also contribute.

I can assure you that there is no design fault within the Brio R amplifier, a fact bourne out by the thousands of satisfied users worldwide.

It may just be that in a very few applications with poor mains, very efficient speakers used as very near field monitors that the miniscule levels of background noise are apparent.

Certainly anybody who comments about hearing "noise" through the tweeter is just hearing ambient noise from an amplifier design that does not employ any suppression on the output devices.

The 50hz quoted being in the bass frequencies and out of the range of many smaller speakers.

It is a little curious, though, that the only mention of this problem is on these forums here as I've not come across it anywhere else. Anyway, following this I disconnected all appliances (including boiler etc) and switched off all the circuits on the main fuse box with the exception of the 1st floor sockets (my system is set-up in my bedroom), plugged the amp directly in to the socket with the just the speakers connected and the hum was still there (I also tested this in a seperate room). I then carried out exactly the same procedure on the ground floor with exactly the same results. I reported this back to Rega and he took this for an opinion elsewhere, the outcome of which is that they are sending a new amplifier to the dealer which hopefully should already be there by now (checking on this later).

I would like to say that Rega have been excellent and extremely efficient throughout. I sent the letter out last Monday and their initial reply was sent at 9-00PM (!) last Tuesday evening, and just after lunchtime the following day they informed me they would be sending out a new amp so a big

I wrote to Rega last Monday detailing the problem and pointing them to this post here, and below is a copy of the relevant part of their initial reply: