hi Shah.. basically Logic7 is an upgraded OEM sound system offered by BMW as an option.to identify if ur car has this or not,just look at the top surface of ur dashboard..there should be a speaker grille right in the middle of the dashboard's top surface,just ahead of the i-drive dome.
essentially,Logic7 gives u DigitalSoundProcessing,Surroundsound,6CD changer and 13 speakers.there are 7 speakers with one on the top center of the dash,one each in all 4 doors and two on the rear parcel shelf.there are also 4 tweeters,two at the bottom of both the A-pillars and two at the rear parcel shelf.finally there are also two subwoofers under both front seats.
i'm not much of an audiophile myself but many agreed that this is one of the best OEM systems out there..and while i can't vouch for Lexus's Mark Levinson or even Aston Martin's Linn and Subaru's Macintosh,i am indeed very very happy with he quality of the Logic7.so much so that i've started buying original CDs again just to listen to such high quality sounds..i'm still not amused by the fact that my Jap-spec can't play my iPod,but that is something that i'll address in due time.current solution calls for me to sacrifice the 6CD changer for an ipod connector,which i'm not willing to do solely because of Logic7's quality sound when playing ori CDs.
so if u are looking for an e60,i'd highly recommend the Logic7.
cheers:65: