I just did the install in my MY2000 996 which uses the same CDR220 head unit, and I unfortunately didn't have as carefree of an experience.

I got a noticeable amount of alternator whine at first, but after putting in a noise filter most of that went away.

Secondly, if you turn up the volume on the CDR220 (I have the empeg hooked up as an AUX device) to around 18 - 20, and pause playback on the empeg you can hear qutie a bit of noise. Not sure what's causing the actual noise itself.

Finally, I have to turn the volume on the CDR220 much louder with the empeg than I have to if I'm just playing a CD or listening to the radio. Any clues?

When you did your install did you notice that the wires empeg provided were way too short to reach from the bottom bay where you installed the unit to the top where you tap into the CDR220's power? I had to extend the wires to do my install.