Dave is a genius and huge figure in Live Sound. Typical live engineer with a "make it work before think days about it" attitude - love it.I’m sort of confused about what this guy is saying:
One of the most experienced guys in the business.
The line array he showed was of course a VERY simple version of a line array - which was not working to 20kHz. In "real" PA linearrays they do a lot of work to get it working till hich frequencies - you need a very special waveguide/horn type for the tweeters which extend the line over all the boxes without hard corners or walls.
With the angle of the modules you can define the area you put your sound pressure. Sometimes you can also influence that electronically.
Less interference, less speakers hanging, more output at the distance and dedicated midrange drivers ( a BIG point in the better sound which often gots forgotten!)