Funny that no one is mentioning the Linkwitz LX521.4MG, which were shown in their own room at the Munich HiFi De Luxe venue: https://linkwitz.store/blog/2023/02/05/hifi-deluxe/ This a pure analog system rather that just speakers, incorporating two active crossovers for frequency separation into 4 separate segments, optimized for the respective response curves of each of the 4 speaker cones, plus a 5-channel amplifier per side (2 channels drive both subs separately), i.e. 10 (!) amplifiers total. Most importantly, the price of the entire system is still a fraction of the IO Design open-baffle speakers (23,000 Euro for a fully-assembled speaker pair, but much less for a flat-pack kit a la IKEA), which, acc to Rick2000 (above) cost quite a bundle: "These IO Design Naked RS Loudspeakers are $120K a pair and they will cost a little more here in the USA though..."
I own this system for many years now and am always deeply happy once - after a long day - I listen to some of my favorite tunes. The spacial presentation and accuracy are really special. And NO: I am in no way affiliated with LinkwitzAudio (albeit, the late Siegfried was a friend). But: I have agreed to open my house to interested parties who want to hear the system before taking the plunge: https://linkwitz.store/blog/2023/01/20/new-linkwitz-lounge-in-fremont-ca/
And again: NO I am not making any money from this!
Audiogon members: welcome to Silicon Valley!