HELP Stereo Upgrade
 

Hi,
I own 2001 X5 and stereo quality is low.
What I have to change for good stereo quality.
my loudspeaker : 65.13-8 380 581. have i to change this ?

First of all change ALL speakers for goOd quality ones (Infinity, MB Quart,....) Then if you are still not satisfied try adding an amp and a sub.
I have changed all speakers and that's enough for me.

Regards

... given your level of audio knowledge, I'd go to Atlanta and Bavarian Soundworks, a vendor on thes very board.