Speakers such as what mhardy shows is an example of a sound experience quite different from what is popularly known as accurate. I'm saying that what is possible with a system like his is the freedom from what evryone here thinks is important to good music reproduction. That being, every speaker specification shown on this or any site only matters and applies to small speakers that cannot hope to represent a live performance so things like dispersion, FR, directivity index, listening window, waveguides,you name it, address the shortcomings of an inherently defective concept by tricking you into hearing as pleasant an experience possible, not reality.
Large, low compression, high dynamic range, horn loaded, single full range speakers are so different from what is usually tested and considered by the majority to be accurate that how one works vs the other in terms of acoustics should be two totally different subjects because optimizing performance for small speakers by way of objective measurements is necessary whereas the pursuit of pinpoint accuracy in large speakers can be mostly ignored and usually is with no compromise in the overall subjective presentation.
I'm just throwing this out there to see what sticks.