Bingenito,
Thanks a so much for sharing all this info. The evolution you went thru with subs, room treatments, long break-in, and class D amps, is very useful info for me.
To All who know these speakers,
I am trying to decide if I should get X3, X4, or X5. The website currently does not offer X5. I assume they will have X5 again within a year. X3 I can get used. Which do you think is best?