just curious what more is involved in putting components in a car with M audio? is it the removal of the factory speaker?These will work with DSP. They are an easy plug and play with the DSP non M audio, a little more involved if you have the M audio due to the midrange speaker on top of the midbass.
There are instructions here from BSW that I used.
BMW Speakers Upgrade for E39 BMW 528i, 540i, 525i, 530i, M5 Sedans & Wagons | BSW: Audio Upgrades For BMWs