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A4 rear speakers not working after stereo install.

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by burnzdog, Dec 4, 2012.

  1. burnzdog
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    burnzdog New Member

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    [Dec 4, 2012]
    Hi All,

    I know this has probably been asked a thousand times, I have just installed a sony stereo in my 02 audi A4 but now the rear speakers dont work. I know this is a common problem but I would like to know whether this is a easy fix? Stereo is a MEX-BT3900U.

    Im using the loom that came with the stereo although I had to *******ise it slightly to add both the Yellow and Red cable from the audi to the red going into the Sony.

    Help greatly appreciated.
    #1
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  3. Emmo
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    Emmo Member

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    [Dec 4, 2012]
    You will need an autoleads adaptor loom. The back speakers are amped and without the loom, the factory amp/sub wont turn on hence no sound from the rear speakers.
    You will also need an aerial booster or your radio reception will be rubbish.
    #2
  4. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    [Dec 5, 2012]
    and you'll need to fade to rear quite a bit to balance the sound as you will now have over twice as much power going to the fronts from the sony
    #3

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