The biggest problem with large line arrays is the image size. You can easily experience a 3 foot wide nose on a singer whose head is the size of your room. Tapered response from the drivers helps alleviate this, but not all line arrays have that.
However, for realistic volume levels and dynamics they are as close as a cone speaker can come to a horn. You do have to sit far enough back from them for it all to get too, but generally you can get a very nice and large sweet spot (not the head in a vice thing).
However, for realistic volume levels and dynamics they are as close as a cone speaker can come to a horn. You do have to sit far enough back from them for it all to get too, but generally you can get a very nice and large sweet spot (not the head in a vice thing).