At this Point you could finally try to adjust the Main speaker delay by +/- 1 or 2 ms or change the crossover +/- 5 or 10 Hz.
But always only one or the other, never both at the same time. And only if you feel like tinkering because the latest result doesn't look bad regarding sub integration.
I will try both ideas. sub is tidy now.
as far as the delay, I'm still confused and would like to learn a bit more. maybe someone can point to a basic page on this?
in a 2.0 system using the external mic, all bets are off, no latency without the sub?