The problem with this system is the stupid dynamic EQ. You have to listen to it at really high volumes, there isn't any other choice.. You can actually hear it going from "mud" to a normal equalization as you click through the volume wheel. The built-in EQ cannot fix this. If you don't want to listen loud, then you're SOL.
I didn't notice this until I had friends in the car who wanted to crank the volume to 11.
methinks BMW should not put deaf people in charge of the audio system.
I haven't yet tried to figure out if the speed sensitive volume setting has any effect on this.
2011 E90 M3 ZP2 ZCV ZCW ZCP (for teh fastAr)
2005 LGT, AVO380 Turbo, a zillion other mods, ECU tuning by me.