background noise
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This seems to be a feature of some BOSE systems. There were reports that Audi had replaced some BOSE amplifiers if the background noise is to loud but they don't seem to do this anymore. I heard this noise with my Symphony II too, maybe a little bit less. But I can hear it only wihtout the engine running. While driving the other noise overlays this.
The difference might be that the RNS-E does not turn off immeditaly, it takes up to an hour after locking the car. The Symphony turned off with ignition, and with it the BOSE amplifier...
The difference might be that the RNS-E does not turn off immeditaly, it takes up to an hour after locking the car. The Symphony turned off with ignition, and with it the BOSE amplifier...
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6,767 Posts
Several messages on other boards indicate that this is a feature, although some with an early Bose Audio Pilot system (2001 in EU) got the Bose amplifier (not the head unit) replaced.
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