You pay for it and you get it...

When it comes to large speakers, IME what you get far more than any other attribute, is the sense of scale...which is what seems to delineate the best large speakers from the best small speakers. As an example, yesterday I had the pleasure of listening to the new Wilson Sabrina X’s and the new Wilson Alexx V’s. While both speakers are from the same manufacturer, and both employ what looks like some of the same drivers, this is basically where the similarity ends. The big Wilson is about seven times the price of the small model! So, besides a much larger cabinet and a few extra drivers what do you get for your money...the answer is SCALE!! This is something that unless heard, is a little hard to fathom. The small Sabrina X’s do most things well..and I was very impressed by them, far superior across the board to the original model Sabrina. The Alexx V’s in a very large room ( which is also a MAJOR requirement for them to work their magic, and if one does not have this I believe then this is the wrong speaker for you) are able to throw a sense of scale that has to be heard to be believed. This is what you pay for with these large speakers, and in the Alexx V’s case, what you get. The frequency response of the larger model is not that different in the highs..and in some extent I think the midrange resolution was similar, but the bass is where it’s at...and this is where I think the sense of scale and enormity comes from. On paper, the smaller model can drop down to within probably ten Hz’s of the larger model, yet in a room of commensurate size, the little Sabrina X’s will never be able to portray the scale of the Alexx V’s. This aspect seems to apply to all large speakers in large room vs small/middle size speakers in large rooms.
Question is is it even possible to get scale with a smaller speaker in any size room, so far I have not heard this...anyone else?
@nationalbar  Intersting post. I am not sure you are talking about dynamic expression vs. scale, but if you can get large scale in this way, I would think it also has to do with your very large room. Essentially what you are describing is creating the same aspect of a large floor stander by utilizing the individual parts as a whole. The x-over and other aspects of the integration would seem to me to be a problem, but if you have considered this and adjusted for it....
Bigger is better!  I have been listening to some enormous (to me at least) speakers for the past 2 days and they’re nuts.  50” tall and 18” deep...

There are definitely things that big speakers do that smaller ones cannot, even with a sub.  I never cared for subs with stand mount speakers and am now wondering if I’d prefer subs with larger speakers more.
You can do this in a smaller room too but there are obvious limits. (I wouldn't try it in a 10x12 room.) I set up a similar system 2 years ago in a 15x20 living room for a client, using Ocean Way HR4's (a compact active horn monitor) for the main speakers at 50" off the floor and a 4 sub DBA. Sounded amazing-and it sounded like a much larger room. The DBA is the key here but you have to be willing to live with 4 subs.
Roll the main speakers off at 80, or 70, set the subs to run from 80 (or 70), down to 20. You'll have to play with levels and maybe set one sub out of phase but it's pretty simple. If you run the subs below 80 and set them up asymmetrically there is no integration problem.
Scale and dynamics are all about cubic inches and size you can not get realistic size, scale, or dynamics from small woofers in small cabinets and when you hear a big full range system in the full size cabinet you will not want to hear anything else.
@speakermaster. I think you also have to add room size. No room less than probably 15x20 will give you scale, at least IME.