As an avid DIYer, I’m still really not a fan of arm-chair audiophiles taking a speaker apart based on whether or not they can find some of the drivers in a catalog or not.
They think "Oh, this is made by (Faital, ScanSpeak, Seas) so it must be garbage and over priced" , but the reality is the minimum driver price to sales price is 10:1, and it goes UP to 20:1 or higher once a maker makes their own in house drivers.
Having said that, I can’t imagine buying a set of speakers for $750,000 unless they come with a stripper pole and multiple bars.