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All of My bang and olufsen speaker keep going quiet on their own and then cutting out. Once cut out the speakers make a popping sound like they are trying to work.
most of the time when I restart the car the speakers work again but instantly fade to a cut out.
please help
 

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First job - chack for water damage of amplifier. Amp is located in boot in recess left hand side.
Google the water damage of amps as its well documented.

'If' it is water damage try and stop water getting into amp (the amp may recover if damp). There is a possibility the DSP chip suffers damage from water which means replacement chip or second hand amp to replace the module.
I had the amp circuitry blow in mine. Not the 'digital' side but the 'analogue' side. I opened the amp to find big black hole in circuit board. I got a similar amp of ebay and replaced the board. All was good after then.

'If' you have to replace the whole amp module or digital DSP board then the module will need recoding to your car. If you replace the analogue board then after swapping boards in module its plug and play.

You may find there is no easy way to find out and do this... Google this to build up a picture. But check amp for water damage (white residue on top of amp). Take amp out and take apart (metal case off) if possible and check for damage.
 

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It definitely sounds like a problem/fault with the amplifier/DSP unit - I had a similar issue with my 2011 A5 Sportback B&O amp with speakers popping. Not sure how old your car is, but unless its an old B&O amp that's been ragged to death by blasting drum and bass at full volume, it would likely be water damage as they are generally otherwise pretty sturdy units.

As mentioned above, water damage is very common with the position of these amps towards the rear of the vehicle (usually located in the passenger side boot compartment), often related to the boot opening. Just looking in the side compartment you may not see that it's wet, however if you take the amp out you will often see signs of water marks on the heat sink of the amp (white residue as mentioned above). At one point on mine, I actually had to pour water out of the amp :eek:

Bose Repair Experts (https://boserepairexperts.co.uk/) based in Edinburgh are highly recommended for Bose and B&O audi amp service, repair and rebuilds - probably the best in Europe. I can personally recommend them 1000%. They tend to have a flat rate for amp service/rebuild of around £260 which is most likely going to be your best option.

For a brand new amp, you're looking around £1200+VAT for the actual amp/dsp unit, plus fitting and recoding to your car (usually charged at your garage's hourly labour cost). You're probably looking at around £1400-1600 total.

You could source another used (working) amp off eBay in the region of £100-500 but this too would need to be recoded to the car, so it would be the cost of this on top.

If it is water damage, you'll also need to find and fix this to prevent it from happening again.

Worth noting - if you do not take action, this may cause further damage to the actual speakers around the car. My faulty amp one day caused the speaker in the passenger side drivers door, to start farting and popping away at full volume. The faulty amp had caused the speaker to short out and subsequently completely melted the back of the speaker, requiring speaker replacement. So to prevent anything like this...my advice (choose whether to follow it!) would be to take out the fuse for the Amplifier/DSP so that it will not cause further damage to the speakers until the amp has been checked over. This may well however, cause the fibre loop to temporarily break that runs the MMI system (so your MMI system will temporarily go off (radio, nav, phone, centre console lights, etc)) until the loop is completed again by plugging the fuse back in. The MMI system will also likely go off when you disconnect the amplifier as it all runs on a connected fibre loop.
 

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Yep. Totally agree with @mfisher . If you can't fix this yourself, get these guys to do it (Bose Repair Experts (BOSE Car Amplifier Repair Specialists - UK And Europe) based in Edinburgh). They are quite cheap considering how much a new BandO amp is!
Don't let it carry on. First make sure there is no leak (or stop leak). Second, get the amp fixed. I can tell you its no fun driving around with no tunes ALL the time.
 

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Audi knew about this problem and made a plastic Amp cover that was a perfect fit & stopped the water getting on the Amps: 8T0863681
However, these are now hard to find from Audi as I think have been discontinued.
 
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Audi knew about this problem and made a plastic Amp cover that was a perfect fit & stopped the water getting on the Amps: 8T0863681
However, these are now hard to find from Audi as I think have been discontinued.
Yep. I never bothered getting one after i fixed mine (not sure mine was water leak. Looked more like a debris infiltration to cause short circuit.
But... i did self manufacture a cover to divert any water away from the fan hole in the top of the amp. Not sure it leaked to test it. And i didn't fully test by pouring water on me own amp! Just a precaution fit only.

Back to the op of thread - you're gonna have to investigate and fix. Lets us know how you get on though. It could help someone else out in future.
 
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