Thanks for the kind words : )

I tried the LC6 in this car as a test and was disappointed. Was noisy, although I wired it in and listened and removed it without much experimentation. Was checking to see if it was a magic bullet, and it wasn't.

The other problem with the X5 and the LC6 is number of channels. See my other post for details, but you're working with 7 pairs of channels if you leave out the 4 channels for the rear doors. You would need TWO LC6s (which is what I understand some of the Mercedes guys are doing).

We used modified Soundgate /Navone units. (We modded them). Same units used in janix' X5. Summed their outputs and ran them into the EQ. Having done this without the EQ (added the EQ towards the end of the installation), I don't see how any shop could flatten out this particular response curve without one. You can play games with reversing polarity on the mids, and relative potentiometer levels on the LOCs all you want, for this I think you need a darn flexible EQ, and I've always been somewhat anti-EQ.

I have read in many posts that if you unplug the digital coax from the changer the whole system is then analog from the HU into the amp (INCLUDING the CD changer). If that's true, yours might vary with volume at that point. Or maybe not. If yours varies with volume, you are way ahead of where I was on this car.