Sorry Bruce; I meant directionality when I referred to 'throw'. Do you use an L1? If so, you'll be aware of the combination of wide dispersion speakers and highly directional ones in each pole, plus the low amount of sound lost in the vertical plane. This combination does result in more useable sound, even allowing for the inverse square law. The system has 'built in' height for middle and top frequencies due to the height of the poles themselves, but it's a good idea to raise the bass bins up if possible.
Thanks for the bit about the Haas effect; I'll give that a try.