1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Bose system cutting out

Discussion in 'In-Car Entertainment' started by Mattinho, Aug 26, 2013.

  1. Mattinho
    Offline

    Mattinho New Member

    Joined:
    Jul 4, 2012
    Messages:
    23
    Likes Received:
    0
    [Aug 26, 2013]
    I have the Bose system fitted to my 06 A3 SE.
    For the past few days the system would randomly pop and all sound would stop. Turning the head unit off and on again would fix this but then it would happen again. I started the car yesterday and the pop happened right away but the sound would not come back.

    Today I got to the amp, unplugged it and plugged it back in and the sound come back..... Until I started the car.

    Unplugging and plugging the amp in fixes the problem but only for a few seconds or until I start the engine.

    Has anyone had this happen to them? Or know what the problem may be?
    #1
  2. Ads

    Ads

    [Dec 18, 2014]

  3. dualmono21
    Offline

    dualmono21 Well-Known Member

    Joined:
    Dec 9, 2006
    Messages:
    1,056
    Likes Received:
    61
    [Aug 26, 2013]
    from your description it sounds like one of the transistors inside the amplifier is or has allready gone out of spec

    you are correct in saying its the popping noise thats causing it
    you may be able to clear it by dissconnecting all the leads and cleaning the connections to and from the stero and amplifier including the speakers
    i would also try and clean up the cars earthing points
    #2
  4. Mattinho
    Offline

    Mattinho New Member

    Joined:
    Jul 4, 2012
    Messages:
    23
    Likes Received:
    0
    [Aug 26, 2013]
    Am I right in thinking I will need a new amp if it is the transistors?
    #3
  5. Mattinho
    Offline

    Mattinho New Member

    Joined:
    Jul 4, 2012
    Messages:
    23
    Likes Received:
    0
  6. dualmono21
    Offline

    dualmono21 Well-Known Member

    Joined:
    Dec 9, 2006
    Messages:
    1,056
    Likes Received:
    61
    [Aug 27, 2013]
    i have never actually had a look at one of the bose amplifiers inside
    allthough i have fixed many many car audio amplifiers before
    if your good with a multimeter and understand how amplifiers work then theres a very good chance it can be fixed
    if not it may simply be easier to buy a secondhand bose amplifier
    #5
  7. Mattinho
    Offline

    Mattinho New Member

    Joined:
    Jul 4, 2012
    Messages:
    23
    Likes Received:
    0
    [Aug 29, 2013]
    I took the amp out today and had a look inside. If a transistor has blown would there be any damage inside? All looks fine??
    #6
  8. Mattinho
    Offline

    Mattinho New Member

    Joined:
    Jul 4, 2012
    Messages:
    23
    Likes Received:
    0
    [Sep 2, 2013]
    Installed the new amp today. Turns out the passenger side door speaker has gone.

    Would it cause any damage to the new amp if I run the radio with the speaker out?
    #7
  9. dualmono21
    Offline

    dualmono21 Well-Known Member

    Joined:
    Dec 9, 2006
    Messages:
    1,056
    Likes Received:
    61
    [Sep 2, 2013]
    wont cause any damage if the speaker is removed
    but please check the speaker cable itself to ensure this hasnt been trapped or cut , if you dont you could end up blowing up the new amplifier also

    there is not allways any signs of damage to an amplifier , ideally you need to know how to check transistors to see if they are working correctly
    #8
  10. Mattinho
    Offline

    Mattinho New Member

    Joined:
    Jul 4, 2012
    Messages:
    23
    Likes Received:
    0
    [Sep 3, 2013]
    Hmm.. I wanted to test the speakers once more to see if any others were out and needed replacing and to my surprise the one that was not working, only issuing pops and crackles is now fully functional.... Any one have any idea what could be causing this?
    #9
  11. Buneet
    Online

    Buneet Active Member

    Joined:
    Aug 31, 2013
    Messages:
    128
    Likes Received:
    31
    [Sep 3, 2013]
    Do you have your own head unit?
    #10
  12. Mattinho
    Offline

    Mattinho New Member

    Joined:
    Jul 4, 2012
    Messages:
    23
    Likes Received:
    0
    [Sep 3, 2013]
    It's the stock Audi Concert head unit
    #11
  13. Buneet
    Online

    Buneet Active Member

    Joined:
    Aug 31, 2013
    Messages:
    128
    Likes Received:
    31
    [Sep 3, 2013]
    Oh right I had a problem similar to this when I had my own head unit. I had to ground the RCA to the head unit chassis if you're able to do that with your HU?
    #12
  14. dualmono21
    Offline

    dualmono21 Well-Known Member

    Joined:
    Dec 9, 2006
    Messages:
    1,056
    Likes Received:
    61
    [Sep 3, 2013]
    test the speaker on its own to see if the speaker is faulty
    then try testing the speaker cable as it could have been trapped or broken at some point and shorted the positive and negative and this could be why the speaker doesnt work and the amplifier shows signs of damage
    #13

Share This Page