OMG, I lost count how many thread leads to the same "NO BASS" issue.
Here is another one:
https://g20.bimmerpost.com/forums/sh....php?t=1760766 ... one of the guys droped his car to the dealer fix it. Still wating for his feedback.
Seems a odd issue that happens since the F30's. Why BMW didn't fix it yet?
For me, it happens only when i stress the amplifier with very punchy songs with volume around 70%-80%. A lot of user have posted that is "amp overheating".