Is this a caveat? Are they not dynamic sounding speakers?
They are "dynamic speakers”. Will they slam like my Wilson Duette stand mount with 8” Scan-Speak woofer? No.
Two Things… I don’t listen loud, so I could use a 20 watt Sony VFET amp or a First Watt SIT-3 on the Allie - I’m doing it on the Wilson Duette. My point about the gear is that I know the magic the stuff I have does in the midrange would be magic on these speakers… but they aren’t “party” speakers.
I would go for an amp that really has some magic in the midrange because that’s the differentiator in the speaker… it’s not crossing from a tweeter to woofer at 1200Hz, for instance, and is extremely coherent.
With Danny’s amps, and probably either of those amps I mentioned… they can be plenty loud enough, for me.
With the speaker being crossed at 60Hz, and using subs… you’ll have to be constantly playing music so loudly that how it sounds probably won’t matter after a while… you won’t hear that well anymore anyway.
They play plenty loud enough for any sane person - although, I know a lot of people are insane, notwithstanding me.

If you want to provide SCALE… that is a different thing… and I am working on a 7’ tall thing that will do that, too - Epiphany 20-21 Line Arrays.
Whether I will like the Line Arrays “more” than I would the Allie with subs - no idea. I do not own a pair of Allie, but I know I would be happy either way.
Before I heard the Allie speaker, I already knew the midrange would be tremendous - and it was. The only question I had was how good the top end extension was going to be since it’s not a “tweeter”… and I really like a good tweeter. Give me a Dynaudio Esotar tweeter and a paper cone woofer, all day long. What Danny did with the very top end with the LGK being allowed to flare up a bit, by design, to my ears - worked great.
The reason I own so many amps is because I like playing with different flavors - same with speakers. These are another great flavor with differentiators unlike most anything else on the market.
One day I will order a pair of LGK drivers and make my own version with an 8” Duelund Coherent Audio / Scan-Speak woofer doing the work on the low end… after all, that’s all it’s doing. Danny could do that, the baffle would be wider, the speaker would be different… and it would cost over $1k more, at least.
So, instead of doing that he’s keeping that woofer cost low and letting you use that money for an even better tool for the job… SUBS.