most accurate loudspeakers....

Roypan -- the measured distortion levels produced by ATC at high spl are comparatively low (unlike many PA systems). That's actually a useful thing.

There is an old comparison of ATC-300 and Dunlavy something here. If I were to stress the point, I would agree that there is some irregularity at the upper mid region at high spls; maybe that unit is somewhat stretched, or the cross to the tweet becomes iffy at very high voltages that don't seem to affect the woofs in the same way.

I would agree with Donald & Detlof above, and raise the following point: an "accurate" speaker-system is capable of creating a NEW musical event in the room, BASED on the original recorded event."
This is just an attempt to paraphrase or review Donald's No1.