The mid and tops run off a single crossover the under seats don't have a crossover. So they were wired up to give a 2 ohm load rather than 4 ohm in full range. They said you either run 4 channels at 4ohm and set crossovers of highs and lows or 2 channels at 2 ohm full range. My amp puts out 92w rms per channel at 2 ohm and the speakers need 80w rms so its a near perfect match. The rears require 50wrms and the amp delivers 66wrms so again we have the amp with more juice then the speakers which means no potential for distortion.
Hope that makes sense.
The balance of sound is loverly and smooth. Even at high volumes it does not seem loud as its so clear.
I am currently uploading videos and photos to my mac. Then the editing begins
E90 330i SE Auto Graphite Grey Metalic