As a further comment. That speaker illustrated on your video above is highly illustrative of the sort on nonsense I'm talking about and illustrates how gullible these audiophools are. The Speaker is the
Wilson "Wamm Master Chronosonic", which is a name right out of the back of the neck before we go any further. That abortion of a speaker costs $650,000!
There is minimal useful information on their site. What little there is, tells you to run away from it fast.
These are the minimal published specs.
Measurements
Sensitivity
93.5 dB @ 1W @ 1 meter @1 kHz
Nominal Impedance
3 ohms / minimum 1.77 ohms @ 310 Hz
Minimum Amplifier Power
100 watts per channel
There are no FR measurements anywhere. However a minimal impedance of 1.77 ohms is a massive warning that the crossover is incompetently designed and likely in resonance. Billy Woodman of ATC taught me that. He said if you design a speaker with the impedance dropping below 2 ohms then look very hard for for evidence the crossover is in resonance. In any event a speaker with that many drivers has no business being designed as a passive speaker. A speaker that complex mandates an active design. To add insult to injury that is also a very ugly contraption.
I have heard a number of Wilson speakers before, and not one of them has sounded like anything I would want to own.
Any self respecting designer with nerve to charge anything like that for a speaker, would be eager to show off a complete set of measurements and also seeking and encouraging third party measurements. That unit is splattered with red paint advising potential customers to run fast in the other direction.