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BMW M5 F90 (2018+) General Forums iDrive, Nav, Stereo, Bluetooth, Electronics    BW stereo not working, only getting tweeters/highs

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      05-18-2020, 01:35 PM   #1
OKM5COMP
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BW stereo not working, only getting tweeters/highs

2020 M5 comp with the BW stereo. So far, BMW has replaced head unit and amplifier to no avail. Sometimes the stereo comes on normally. Other times, there is no output at all from bluetooth source, but switching to satellite radio gets you some music, albeit only high frequencies. I'm not sure if this is a partial range signal or if only my tweeters are playing. Appreciate any ideas!
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      05-18-2020, 05:29 PM   #2
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If head unit and amplifier swap did not cure the issue, then you have narrowed the possibilities down to either the speaker wiring or the speakers themselves. The intermittent nature of your issue leads me to think faulty wiring. Possibly a loose connection or a wire that got crimped or damaged somewhere.
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      05-18-2020, 06:03 PM   #3
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Thanks for your input. What surprises me is that when everything plays it stays on. System never cuts out. And why would you get no output from a Bluetooth source but some from the satellite radio?
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      06-24-2020, 10:23 PM   #4
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So apparently the BW system has 2 amplifiers and one needed replacement. Problem now solved.
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      09-14-2023, 12:10 AM   #5
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Quote:
Originally Posted by OKM5COMP View Post
So apparently the BW system has 2 amplifiers and one needed replacement. Problem now solved.
I am experiencing a simular issue. I am only hearing highs and bass, no mid range. You mentioned there are 2 amps and one needed to be replaced, do you know which one it was?
The only amp I know of is in the trunk on the driver’s side. Was it this one? Where is the other one?
Lastly, did warranty cover this ?
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      10-11-2023, 07:20 PM   #6
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Quote:
Originally Posted by 916_M5 View Post
I am experiencing a simular issue. I am only hearing highs and bass, no mid range. You mentioned there are 2 amps and one needed to be replaced, do you know which one it was?
The only amp I know of is in the trunk on the driver’s side. Was it this one? Where is the other one?
Lastly, did warranty cover this ?
you might want to check this

https://f90.bimmerpost.com/forums/sh...0#post30562640
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      10-27-2023, 04:16 PM   #7
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I might have to check on this. I adjusted the EQ based on the long thread on this forum and the HK in my X5 still sounds better and has a deeper punch on bass for sure. The system has surprised me, and not in a good way.
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      10-31-2023, 11:07 AM   #8
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Update:
3 out of the 4 mids had to be replaced along with the entire B&W amp in the trunk. This was covered under my extended Zurich warranty.
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