So I tested the SWS8 crossed over at 200, no EQ, both polarities.
Big difference in performance. See two attached curves.
I also attached where I ended up after a quick full EQ and time correction tune. I have a peak at 10K-ish that showed up after TA that I need to get rid of. Other than that, the thing sounds great.
Was listening to the title track from Acid Tongue by Jenny Lewis - the backup vocalists sounded like individual point sources instead of a massed group of voices. Kinds scared me, really
Was not expecting it.
The underseat midbasses sound pretty good. They have their limitations, and as expected are the weakest point in the system - but they are not bad.