The mid bass horn (if that's what the larger of the 3 is) throat looks on the large side - unless there's an 18" driver in there and the horn rather too short... Not really much horn loading going on there I would think, regardless of size and driver. Hard to get an idea of scale so I looked around.
http://www.lsionline.co.uk/news/story/Major-Russian-install-for-Void-s-Air-Motion/TLXF6P
Used atop of a mid bass channel and then a sub arrangement. So top part of a 5 way. As NSM says in a venue / PA application.
The back boxes have an almost nautical or submariner look to them.
Ideally for imaging and cohesion they should be lined up one on top of each other. I tried it like this way back, as a plonk down having just made the first set and vertical is def better for normal room hifi. Mid bass, treble, mid is the way to go. Hence most commercial hifi and serious DIY efforts do it that way...
I can see why they have done it like this as PA top 3 channels though - the stack gets too high otherwise and as they are the top 3 channels and will be used at distance in venues it will work just fine.
Not heard them so reserve judgement. They look a lot better than most PA efforts I've seen and have awards etc
You'd need a really big room to get them to work I think