Excellent thread. Thank you OP.
I made the following settings on my '09 E92 with premium sound.
100 Hz: 0
200 Hz: +1
500 Hz: +3
1k Hz: +4
2k Hz: -1
5k Hz: +3
10k Hz: +3
Music from my SiriusXM Onyx Receiver is "brighter" and sounds great. I ended up using +2 on the Bass setting, it was just a little "boomy" for me.
Character does count. For too long we have gotten by in a society that says the only thing right is to get by and the only thing wrong is to get caught. Character is doing what's right when nobody is looking... " --J. C. Watts