Could recommend speakers suitable for extra-large spaces?

[CINERAMAX]

Also I would not throw away the muicality Baby with the bathwater...Consider the ML811.

 

[Flaesh]

- JBL: https://jblpro.com/en/product_families/small-format

https://www.spinorama.org/speakers/JBL C222/JBL/index_vendor.html - C222 doesn't seem like a SOTA speaker. The visual design is fun though)).
If the budget for audio equipment is not a concern - I would consider more decent speakers.

List is endless

Even without the C222 and small speakers, the list is enough endless - from the old cheap JBL 4722 to Meyer\Omholt\Danley.

For the low end I would use a bass array. Single, double or combined. See DBA threads. In a purpose built room I don't see (?) the need for Trinnov Waveforming.

 

[CINERAMAX]

Here is the latest large format Dynaudio Acoustics: