Harman Kardon sound issue

[HH7]

Hello everyone,

I'm facing an issue with my Harman Kardon sound system, whenever I'm trying to play a song with high notes the music will sound like there's something that vibrates inside the speakers, the rest of the speakers works fine only the back speakers near the trunk.
I contacted my local dealership regards the issue, they order some speakers from Germany but now its worst than before.
I wanted to know if anyone had the issue with there HK sound system or how can I fix the issue please do let me know, and I'm definitely going to call my local dealership.

so I attached a video to show the sound quality in my car X5 50i 2015.

Many thanks

[HH7]

If the video didn't work here is a link to the video

[MarcoZandrini]

Rattling is due to either the speaker not being properly mounted or the speaker being overdriven. I have the HK system in my 2018 M240i. Sucks. Replaced the speakers and the sound is much better. If those are the factory speakers you should consider replacing them. BMW doesn’t seem to put much effort into their cars’ sound system.