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  1. #1
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    volume changes with speed

    on my 2001 s4 factory bose symphony system it sounds like **** when its at low volume(almost like a blown speaker) then when you speed up it all of sudden kicks louder and sounds great. what the hell?

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  3. #2
    macca's Avatar
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    they have a speed pulse input on the stereo called GALA, this can be set on the stereo for the amount the volume is increased.
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  4. #3
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    It could be that you do have a speaker on its way out. A speaker interconnect (or whatever its called... the tiny sliver of wire that runs from the cable connectors, through the cone then down to the magnets) may have partially broken (or have a bad connection), which at low volumes will not sound right. As Macca pointed out, the headunit takes a signal from GALA and increases the volume as you speed up (to try combat external wind/road noise). The increase of power to the speakers may temporarily overcome the fault resulting in the speaker once again sounding clear, but as you slow down the fault will return.

    Does the same happen when your car is not moving and you simply turn the volume up?

    Andymac is probably your best bet to get a better answer on this as he seems to be all knowing when it comes to sound!

  5. #4
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    The door connectors are the most likely culprit. They get "dirty" and need more power to make the connection. Either that or you just need to resolder some of the components on the Bose amp. The solder joints dry out over time and this can cause intermittant cutting out/crackling, especially at low volumes or when the amp is cold.
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