First of all I'm new to the site. I have a 2012 535ix is this an 'F10"? I also purchased the premium sound system is this the 'HK L7'?
I am an audiophile and require a nice sound system. I just traded in my Lexus GS450H with the Mark Levinson system. at times I like the bimmer system for the highs but the lows are to put it mildly,"not good" also this sirrus radio sounds like its out of phase or in reverb or something, with the surround on or off. I was very disappointed in BMW in this regard. Im thinking about adding and audiobahn subwoofer and possibly and audiobahn amp and capacitor (I just so happen to have all of these laying around). any thoughts, ideas or warnings?