Many of you mention MBL. There is also BayZ Audio, according to some one of the most natural sounding models. And designer is a scientist.A hardcore scientist.
Now, I bet none of you heard Zeta Zero Orbitals!
Their designer is sound engineer, professional one. Makes his own drivers with specs way beyond any other drivers. At least subwoofers and omni ribbons. Midrange, perhaps there is some competition like AER.
Its just that he totally does not care about marketing.... so you dont hear about these speakers, almost nowhere.
So with Orbitals we have tubus cabinets - best shape for a cabinet, aside from a sphere.
These speakers can take unreal amount of current.... so their distortion is almost nil at any volume. Capable of filling with (undistorted) sound the entire, full size! stadium. All that with a pair of towers you can put in mid sized room.
The mass of their drivers is lower than MBLs. Sensitivity is way higher 92dB so they can be driven by tube amps. While MBLs.... not really.