2003 540 DSP Audio Quality Help

[orlin]

Hello, recently purchased a 2003 540 with DSP (Premium Sound). The car is awesome. The only concern is the poor quality audio!!! Yes, I am familiar with all the dsp settings, and compared to my Harmon Karden in the former 325, the dsp is very disappointing. Can anyone confirm swapping out the Nokia deck in the rear with the factory 5 1/4 subs, for the M5 M-Audio 10" Subs.

What exactly is involved with the installation. Is is as simple as changing them out and snapping on a clip, or is it more involved. Has anyone personally done this? I've read various posts elsewhere (including bmwtips.com), but need to confirm this will work. Any help would be appreciated.

Regards,

Orlin...