BX5a buzzing sound

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I have a pair of M-AUDIO BX5a but one of the pairs has a buzzing sound.

It was working ok and then I started making a buzzing sound.

What should I do?

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Dan R (Employee) January 20, 2015 19:12

Hello Jon,

Thanks for posting. Sorry to hear you're having trouble!

A good test to confirm the issue lies in the speaker would be:

1) Disconnect any audio cables from both speakers, leaving only power cord
2) If buzzing still occurs, swap the power cords between the speakers
3) If buzzing still occurs and in the same speaker, we know the issue is due to something internal to the speaker.

If this is the case, contact technical support or the distributor in your region to discuss service options:

USA & Canada
Phone: 401-658-5765
Hours: Monday - Friday 8:30AM - 6:30PM EST

Germany
Phone: +49-2154-81299-20
Hours: Monday - Friday 9:00AM - 5:00PM CET

UK/Europe
Phone: 44(0)1252-896040
Hours: Monday - Friday 9:00AM - 6:00PM BST

Brazil
Phone: +5511 - 3222-6476
Hours: Monday - Friday 9:00AM - 6:00PM BRT

Email
http://www.m-audio.com/support/contact

International Distributors
http://m-audio.com/distributors

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Hello Jon, Thanks for posting. Sorry to hear you're having trouble! A good test to confirm the issue lies in the speaker would be: 1) Disconnect any audio cables from both speakers, leaving only power cord 2) If buzzing still occurs, swap the power cords between the speakers 3) If buzzing still occurs and in the same speaker, we know the issue is due to something internal to the speaker. If this is the case, contact technical support or the distributor in your region to discuss service options: USA & Canada Phone: 401-658-5765 Hours: Monday - Friday 8:30AM - 6:30PM EST Germany Phone: +49-2154-81299-20 Hours: Monday - Friday 9:00AM - 5:00PM CET UK/Europe Phone: 44(0)1252-896040 Hours: Monday - Friday 9:00AM - 6:00PM BST Brazil Phone: +5511 - 3222-6476 Hours: Monday - Friday 9:00AM - 6:00PM BRT Email http://www.m-audio.com/support/contact International Distributors http://m-audio.com/distributors

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John T February 01, 2015 20:28

Same thing just happened to one of my BX5a speakers. I did everything you suggested, @Dan R – still doesn't work right. I would also add that when I turn the power switch from On to Off, it jacks the speaker, causing a loud noise – almost a popping noise, but not quite the same.

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Same thing just happened to one of my BX5a speakers. I did everything you suggested, @Dan R – still doesn't work right. I would also add that when I turn the power switch from On to Off, it jacks the speaker, causing a loud noise – almost a popping noise, but not quite the same.

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Jon Eyvindur Bjarnason February 01, 2015 20:50

You need to replace the main electrolytic capacitors.

If you are trained or educated in this field, then you can do it yourself easily.

I recommend doing both speakers.
I had one fail, fixed it, the other failed 6 months later exactly the same way.

I posted a detailed description on what failed and how to fix it. The moderators of this forum deemed that the content was inappropriate.

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- John T February 01, 2015 21:16
  
  Thanks, Jon. That's weird that they would take such helpful information down. Have you posted it elsewhere?
  
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- Jon Eyvindur Bjarnason February 01, 2015 23:02
  
  No, I have not. Perhaps google "6800 bx5a".
  
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- John T February 02, 2015 04:23
  
  I'll do that. Thanks, Jon.
  
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- John T July 21, 2015 16:21
  
  This fixed the problem for me. Been working great ever since!
  
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- Paul Rowe October 04, 2016 02:25
  
  My speaker is doing the exact same thing as mentioned. I'm going to change the caps as well.
  
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- Paul Rowe December 27, 2016 21:48
  
  Changed the power caps and fixed the problem. I bought 4 6800uf 35v power caps from ebay for $10.
  
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You need to replace the main electrolytic capacitors. If you are trained or educated in this field, then you can do it yourself easily. I recommend doing both speakers. I had one fail, fixed it, the other failed 6 months later exactly the same way. I posted a detailed description on what failed and how to fix it. The moderators of this forum deemed that the content was inappropriate.

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Etvi Juntunen July 21, 2015 14:49

I also had a loud static hum in one of the monitors. First I replaced the 6800 μF capacitors with new ones but the problem still persisted. Unwilling to give up so easily I kept on thinking and decided to replace the power amp circuits. The reason for this is that the monitor has two separate amplifiers for low- and high-frequency channels powered by the same transformer. This ruled out the possibility of badly connected jack- or XLR-connector and several problem descriptions in the internet indicated problems to be occurring in just either one of the channels.

I found similar TDA2052 V-amplifiers by ST Electronics from ebay (~3 €/pcs) and soldered the new ones on the PCB. After putting everything together I tested the monitor and now it works like a charm.

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I also had a loud static hum in one of the monitors. First I replaced the 6800 µF capacitors with new ones but the problem still persisted. Unwilling to give up so easily I kept on thinking and decided to replace the power amp circuits. The reason for this is that the monitor has two separate amplifiers for low- and high-frequency channels powered by the same transformer. This ruled out the possibility of badly connected jack- or XLR-connector and several problem descriptions in the internet indicated problems to be occurring in just either one of the channels. I found similar TDA2052 V-amplifiers by ST Electronics from ebay (~3 €/pcs) and soldered the new ones on the PCB. After putting everything together I tested the monitor and now it works like a charm.

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Jim Burrill January 11, 2016 18:11

Please allow me to give you some feedback. I had three Dell computers go down with leaky/bad electrolytic capacitors on the motherboard. Dell sent me three new motherboards. It seems to me this is a similar problem, known bad electrolytic capacitors....

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Please allow me to give you some feedback. I had three Dell computers go down with leaky/bad electrolytic capacitors on the motherboard. Dell sent me three new motherboards. It seems to me this is a similar problem, known bad electrolytic capacitors....

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Cezar Petrovici February 02, 2016 14:08

It is well known that BX5a biggest problem are the 6800 μF/25V capacitors. Browse the net and you'll see.The worst thing is that if you don't fix the problem sooner, you risk to destroy both the tweeter end the amp (in that order). This happened to me! For such hidden manufacturing faults, cars are recalled in service. Consummer rights must be respected.

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- Jon Eyvindur Bjarnason February 02, 2016 17:46
  
  How does it destroy the tweeter?
  
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It is well known that BX5a biggest problem are the 6800 μF/25V capacitors. Browse the net and you'll see.The worst thing is that if you don't fix the problem sooner, you risk to destroy both the tweeter end the amp (in that order). This happened to me! For such hidden manufacturing faults, cars are recalled in service. Consummer rights must be respected.

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backlash2142 March 04, 2017 04:35

Hello! I had a similar problem and changed the caps in both speakers which helped stop the crackling.
But now my right driver takes 5 minutes of more to warm up.
The tweeter works when I turn it on, but he driver takes at least 5-7 minutes before it will produce any sound. And it will usually make a popping sound right before it starts working.

Has anyone heard of this?

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Hello! I had a similar problem and changed the caps in both speakers which helped stop the crackling. But now my right driver takes 5 minutes of more to warm up. The tweeter works when I turn it on, but he driver takes at least 5-7 minutes before it will produce any sound. And it will usually make a popping sound right before it starts working. Has anyone heard of this?

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