Humming ,buzzing Brio r

domenn

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I've got brand new Brio R . I was hoping that second unit will be ok . but i just noticed that my left speaker is humming , buzzing more than left speaker , it's tweeter actually . I can hear that from 30 cm . My speakers are placed on computer desk so it's annoying . The old Brio R I had before was not buzzing so loud . Now I am getting paranoid .

Is this another faulty unit ? .Sound is very good but I went for rega for their well known reliability too .
confused.gif
So do I have to contact my seller again ? they will thing I'm crazy .
 
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Anonymous

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Hi domenn,

I'm experiencing something very similar to what you are describing.

In September I got my first Rega Brio R with the Rega DAC. It sounded great, but I noticed this very subtle buzz/hum from the tweeters of my speakers that I haven't heard with my previous amps. It's not noticeable when listening to music at a medium volume, but when I'm home alone I do notice this buzz/hum from the tweeters when the amp is turned on and nothing is playing. I also notice the buzz/hum when I listen to talk radio with pauses, and it's actually very annoying.

I went to the dealer and got a new Brio R amp. The new amp had the same buzz/hum and also the additional problem that the input selector would always switch to input 5 when turned on. So now I had an amp with two obvious problems.

The dealer - reluctantly - gave me a third new Brio R amp, and this amp still has the buzz/hum problem. I'm very certain that it has nothing to do with ground connection or anything else outside the amp. My best bet would be that it's the power supply that interferes somehow.

To be honest I'm a bit disappointed with Rega since the amp is otherwise very good indeed. I was planning to go all in with Rega and buying a P3 and the RS5's but after the experience with the Brio R I'm no longer sure that Rega would meet the standards that I expect from a renowned hi-fi brand.

Do anybody else have the same problem with the Rega Brio R?
 

domenn

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Hi , maroni so I've got my 3th unit and hum buzz is still there so I'm trying to get used to it , and input 5 that was exactly problem with my first unit , looks like Rega is making them in rush :)
 
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Anonymous

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VinylRush said:
I have the hum. But I have a mains wire running by the speaker cables so I assumed it was just interference.

Have you tried to move the mains wire away from the speaker cables?

I thought too in the beginning that the hum had something to do with external interference, but I have now tried several combinations of cables and positions - and it just keeps humming... so my conclusion this far is that it must be the power supply making interference internally...

I really wonder why this apparent problem is not mentioned in all the raving reviews.
 

VinylRush

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Hi.

Not unless I pull my whole unit out, which I don't want to do. TBH it's barely audible on mine and doesnt bother me. I never thought it could be noise from the power supply.

Not sure what else you can do.

Maybe Rick from Musiccraft can shed some more light on it and see if any of the units he has heard has this problem.

Cheers.
 
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Anonymous

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I wrote to my local Rega distributor regarding the humming, and they wrote to the Rega main office.

Rega answered that they are aware of a 50Hz hum caused by the transformer.

I guess the humming is just a part of the package then... although I'm not happy about it!
 

eggontoast

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maroni said:
I wrote to my local Rega distributor regarding the humming, and they wrote to the Rega main office.

Rega answered this:

"We are aware of the 50Hz hum, having a transformer of that VA rating so close to amplification circuits can cause a hum. Terry had the BrioR toroid designed so that it would have "lower" strength areas of the magnetic field to enable mimimum hum to be present. Therefore each Brio-R toroid is rotated and set during production with the "noisier" part of the transformers field aimed away from the sensitive circuitry making the hum acceptable at a low level."

I guess the humming is just a part of the package then... although I'm not happy about it!
Crikey, I'm not surprised your not happy that is real p155 poor design especially for an amp of this price range.
 
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Anonymous

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after reading this i have checked mine and luckily i have no hum at all, i hope you get it sorted out.
 

Oldenbroke

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My new Brio-r also hums, but I have to put my ear close to the speakers to hear it.

Behind my hifi / home cinema kit its spaghetti junction, so just assumed mains

interference. It doesn't interfere with my listening pleasure even at low levels.
 

Sizzers

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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!
 

domenn

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I'll be attending Bristol show so I'll ask about this problem , and also about mains cables I am thinking to upgrade dac and amp maybe it will reduce humbuzz .
 

Sizzers

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Well as I say, I don't believe this should be occurring with a £500 amp.Looking at the reply from Rega above does indicate a design flaw but I will have to await their reply for their take on it. It's annoying even at 10-12' away, and I'm pretty unhappy at the moment because it is marring what is otherwse an excellent amplifier.

Well as I say, I don't believe this should be occurring with a £500 amp.

Looking at the reply from Rega above does indicate a design flaw but I will have to await their reply for their take on it. It's annoying even at 10-12' away, and I'm pretty unhappy at the moment because it is marring what is otherwse an excellent amplifier. It might seem trivial to some but I do like to warm my amp up a bit first, and i can't always be bothered to get up last thing at night to switch it off. There was no mention of this in the WHF review which I would have thought they would have passed comment on if their had been this issue with their review unit, so I'll just have to wait to learn if it's a fault or a flaw.
 

domenn

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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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Anonymous

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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...
 

npoguy

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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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Anonymous

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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
 

mykspence

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Sizzers said:
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
 

Sizzers

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mykspence said:
Sizzers said:
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:

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 speaker

It is a little curious, though, that the only mention that I have found of this problem is on these forums here as I've not come across it anywhere else. Anyway, following this I disconnected all the 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 just 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 the new amp so a big "Thank You" to Rega.
 

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