What is your opinion of single driver speakers

Tried many, Overall i prefer the Cube Audio stuff  More dynamic more bass than any other drivers iv tried.

I have Closer Acoustics OGY speakers (EMS LB5 fullrange driver + transmission line the size of a cereal box) powered by a fully-restored Continental Edison PA9109 amp and I couldn't be happier. You'd expect the OGY to lack bass and sound lean/dull. That is far from the case. The bass is so fast and tight with some extension. But manage your expectations considering the size. They don't play extremely loud however, so they're ideal for a small room like mine. Most other speakers just sound veiled to me, especially for movie dialog.

I also have a REL T5x sub, but I don't think it makes a huge difference at low/moderate volumes. 

I dont understand why so many folks like single drive LS, (SDLS). It got following issues, Bass- low bass can fixing to add sub, but still missing upper bass 100-300hz- sound still weak and no full body, Whizzer cone got very poor characteristic to compare hi end Tweeter, We design all my speakers included demonstrated at CAF and NY audio show -- wide range driver with no crossover like SDLS but with accompanies one or two woofers plus high end supertweeter , If you not far from Brooklyn, we have show room working 6 days in week, no appointment need it

Sacrificing the frequency extremes with such ferocity (extraordinary determination if you like) is an acquired taste. At a minimum, but certainly an entirely different mind set then almost any norm. That’s fine of course, but some pretty complicated psychological things are going on with passionate adherents. Pointing to the trade offs either way doesn’t get you closer to understanding those deep unconscious impulses that in turn, either rationalize or especially, intensely focus on the positives. Which are there, but not nearly as much a the negatives for any real breadth of music - at least objectively. None of us listen to music wholly objectively however. We can’t if we’re going to enjoy it. There’s a good deal more subjectivity mixed in with single driver systems - just as it is in certain other aspects of our hobby. You can’t easily convert someone to it. They have a visceral inclination towards it - or not. The Freudian, Jungian etc. complications involved would be mesmerizingly interesting to be sure, but accurately ascertaining it probably borders on the mystical.

Um, Ah,,,, Er, what?