Need Help 2005 Euro X5 Audio Upgrade

[As_usual]

Hi All,

I want to upgrade audio in my 2005 X5 3.0d. There is no dsp, no separate amp. I think I just have BM54 unit. I searched every thread but US X5 have separate amps or dsp with sub, I cannot figure it out. What I want to do is replace speakers and feed them with an amp and keep the stock unit (bluetooth,fm vs). I also installed gromaudio through cd changers cable. How can I upgrade it without tearing apart my car?? I am residing in Europe, so bavarian sound is also not an option. Thanks

[As_usual]

Anyone?

[Nik]

Yes, you have to take the car apart and install new wirings for speakers to amps. but all can be done.