In addition to more volume displacement, a vertically symmetrical array can be used to control vertical dispersion. The Snell XA series from the late 1990s/early 2000s was one such example, with driver spacing and crossover points synergized to control vertical dispersion and avoid floor/ceiling reflections. However, the spacing requirements and crossover demands are such that most WMTMWs are not optimized for vertical dispersion control. They are done for looks as much as anything else. One problem with that statement is that most multidriver speakers are not that good, either. Also, most larger (>4") "single driver" speakers are actually primitive coaxes. They have a supplementary treble radiator, such as a "whizzer" cone, that provides extra breakup that sounds sort of like treble if you imagine really hard. That leads to both on axis frequency response problems, and sound power problems. But that's just what I hear. I would hope that anyone pondering something as expensive as Voxativ would spend the time, effort, and money to hear them, and hear them in direct comparison with a known reference.