Are we refering to the AG Duos in the YT video?
Or another smaller version w/o sub bass??
If we are refering to the speaker in the YT video, I'd say a rather large size area might accomadate such a rather huge,,,if not massive soundstage.
Horns like stats need huge areas to breathe,,othwise the listener feels he is being attacked by the speakers.
Small room for a horn??
Ner heard such a set up.