It has been a long time since I heard that array, but it has some interesting characteristics. One of them is not sounding great. Maybe with a different setup it could have sounded better, but I was not in love with it as I heard it. It was amazing however that as you walked closer to the array it didn't get much louder. Up close you were only hearing a few drivers, and as you walked away you heard more and more drivers. As a technical demo it was pretty cool, as a large scale PA not so much.
Mac
That's, more or less, what I thought. Really great for voice I think, but not so much for music.
Very interesting effect in the "near" vs "far" field.
They did have a small unit with 2 MAD drivers on either side (splayed slightly) with a 6" ribbin driver between.
Now they sounded quite nice.
I didn't know a planar driver existed that went down to 150.
Ivan, I will have to admit that this array didn't seem to have the same kind of "cohesive" sound as some of the --no name mentioned-- horn loaded full range speakers I have heard...down south