Dr Floyd Toole during his NRC days found three things were important to listeners (they performed rigorous tests). Wide Dispersion, flat frequency response and low distortion. I'd propose that this is a basic requirement but there is a lot of cheap stuff that does this well at low volumes. (For example...even Audioengine A5's sound pretty good!)
So perhaps "high-end" is mostly distinguished by the fact that a "high end" system will do these three things well at realistic live music SPL levels. Just two cents...
So perhaps "high-end" is mostly distinguished by the fact that a "high end" system will do these three things well at realistic live music SPL levels. Just two cents...