[Lurcher]

I have a similar amp (Audioson in the Z and a fischer in the x3). I'd d swear they are the same boards, just cross branded (plus are all the same configuration), but I digress.

I had them use a separate RTA for the z tuning (award winning installers here in Dallas), but I still ended up re-tuning over the course of a week. I got 2 different sound files for the X3, and again adapted accordingly. 50 yr old ears now in effect.... On both systems - one you understand the basics - it's fun to play around with. The complexity is in the crossover types and the db filter "strength". Bimmertech should have a file for the Z, they (Nelson - great guy) sent me theirs for the X

So - how do they sound?

The subs are going to be a bitch :-)