[gago1101]

Does anyone know what is the actual difference between the regular sound system and the Harmon Kardon system?

I am an audiophile and do appreciate good sound. However, I have not been impressed with Harmon Kardon at all in my MB cars, including the 05" E55 and the latest 12' CLS63 AMG.

In contrast, my father drives a 07' 328i with regular BMW system, and I do enjoy the sound: natural, open and accurate. It does not play as loud as the Harmon Kardons that I hace owned in the past, but at normal volumes, it sounds better to me.

I would want to know what the actual difference is in hardware. I have ordered my M3 with regular sound, but may consider adding the Harman Kardon if it really worth it.

I would also want to add that I have the Bermester in my PPT, and, although it sounds nice and probably better than any other system I've heard in a car, it is somewhat overrated.