I have searched for months for an answer to this problem : the speakers in my 2004 x5 non-dsp do not work. I only get sound from the tweeters . I have tried three different amps , that's not the problem I took it to an audio shop they can't find anything wrong with it. I guess my next stop is the dealer I'm really scared about the price. It really sounds like loose wiring because the speakers came for like 5 seconds the other day. I have searched the forms and others have had similar problems but no one had a fix. help!!