The question is how wide? Some speakers are flat off axis to 30 degrees, then a roll off begins. Some are flat to 45 degrees, some to 60, some to 75+. Assuming if all of them rolls off without any peaks or troughs, and they have identical on axis FR, they will sound different, but which one is best?\nI don't have anything other than personal experience (which is subjective) to back it up, But I have always felt that the presentation of omni-directional instruments benefits from an omni-directional speaker and something like Chris Botti playing trumpet from more directional speakers. Logically it makes sense that if the trumpet were broadcast into the room in an omni-directional manner, something would be off about the presentation...and if a violin were played over a speaker with fairly directional waveguide, the ambience from room reflections would be off.\nIt has been my experience that a more aggressive (more directional) waveguide increases imaging. It is also my experience that a violin played in the room (with eyes closed) is not so tightly pinpointed as a trumpet that is pointed in my general direction!\n\n\nPS - I am talking in simple stereo. Some of the multi-channel options attempt to recreate the acoustics (with delay\/echos for the surrounds) of various venues and I don't know how that would interact with the reflections produced by omni-directional speakers vs more directional speakers.