I did some changes to this setup (especially the DD) ...
I removed the Axiom, finally ... only the DD is running.
the changes I made are two-fold - so I don't know which one made THE big difference, I upped the crossover on the DD from 80hz to 146hz to avoid cascading crossovers DUH should have thought about that a long time ago. There's a subsonic filter on the DD set to 15hz ... it's default set at 24db/octave, I changed that to 6db/octave.
I now find myself not wishing for more. hmmm. I did not see how those changes affected the FR graph, because the wife did not want to hear the sweeps (we're expecting and I have to give in to everything she asks). will update asap.