The Tektons are an attempt to simulate a "concentric" driver.
IMHO, they are not quite as coherent or consistent in response at off-axis angles as something like a Tannoy dual-concentric- but the Tektons are quite good, especially considering how much speaker you get for the money. Lot of bang-for-the-buck there. Not my personal favorite (though I don't dislike them), but pretty impressive, nonetheless.
In contrast, speakers with long vertical columns of identical drivers, like the McIntosh towers, Pipe Dreams and such, are basically line-arrays. A cylindrical radiation pattern, as opposed to a spherical radiation from a point source. Great for filling a space with sound at a uniform level and frequency response, but maybe not quite as "pinpoint" from a soundstaging (especially vertical) standpoint, in many cases...
OTOH- so-called "kabuki" speakers, seem to have a very random, uneven dispersion pattern- with frequency response that is VERY dependent on the angle of listening. With the coupling, cancellation and comb-filtering from that many disparate drivers, in that random and asymmetric of a layout, with many of the drivers sharing the same frequency ranges, the sound is literally different in every direction, as opposed to every other direction. Move to one side or the other, or up and down, and the speaker frequently sounds like a completely different speaker!
Regards,
Gordon.
