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Sub buffer dead

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Old May 4, 2021 | 12:22 AM
  #1  
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Default Sub buffer dead

Hello there folks,

So I was driving one day, and noticed that my BOSE sub was not working, and on further inspection there is no sound emitting from the sub, but its neighbors do work, so I'm not sure what it is really.
Green are the ones working fine, red (the sub) not.

VCDS show no errors. Any thoughts, on what could it be?
Cheers
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Old May 4, 2021 | 05:21 AM
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https://www.audiworld.com/forums/new...ply&p=24546717

Read this thread....may help.

Wayne
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Old May 4, 2021 | 07:14 AM
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The BOSE sub is an integrated unit with the power amp built into it. Check there is power and audio signal to the unit, if there is then it’s probably dead, and needs replacement.

Used ones are easy to source from eBay. Part no: 4E0035412A
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Old May 4, 2021 | 07:20 AM
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I'll take a look at it, thanks
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Old May 4, 2021 | 07:21 AM
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Originally Posted by dvs_dave
The BOSE sub is an integrated unit with the power amp built into it. Check there is power and audio signal to the unit, if there is then it’s probably dead, and needs replacement.

Used ones are easy to source from eBay. Part no: 4E0035412A
Yeah Its behind, but my worry is how can I check if there is power to it correctly?
Any guides or info?

Cheers
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Old May 4, 2021 | 10:02 AM
  #6  
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Default Audi A8 Workshop manual / Amp

Here is the Audi workshop manual for the standard and Bose Subwoofer amp pic configuration.

Wayne
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Old May 4, 2021 | 10:43 AM
  #7  
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Originally Posted by Displaced Viking
Here is the Audi workshop manual for the standard and Bose Subwoofer amp pic configuration.

Wayne
Appriciate it I'll look into it, also do you maybe have a wire diagram, where it goes and through what.

The sub seems to be working but very low, like its on 10%. I'll have to check the wiring.
Cheers
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Old May 5, 2021 | 12:36 AM
  #8  
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I have just read your private message and now I deleted your problem. If you have done the test suggested above then it looks like you will have to remove it. I will see if I can find the info again.
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