Originally Posted by kosmokrator
Sometimes works, sometimes not, is my experience.
D&B J-series tends to work in my experience. As backline tech I'm often directly behind the subs.
brands and type have absolutely nothing to do with it. you can array any type or brand.
all it takes is skill and knowledge.
there are several different options when directing sub.
whenever you use more then one sub at the same time, they will interact, and in some way get directional.
for example: putting 10 subs next to each other in one line in front of the stage, without doing anything, automatically creates a very small beam in the center, both front and back.
commonly used solution for this is "Arcing" the subs, by pair by pair, delaying the subs, starting in the center, increasing delay going outside..
this creates a more cardioid form, spreading sub in front, and decreasing sub in the back (exept for the cardioid tail in the middle)
another way of directing subs is as mentioned above: take 3 subs in line, and phase-reverse the middle one, also creating a Cardioid field..
Third commonly used technique is "END FIRE", putting 2 lines of subs fysically behind each other, delaying the first line, to time-align to the second line, increasing power forward and decreasing power backward..
something to keep in mind:
EVERY way of making subs directional consumes overall power.
you will always need MORE subs to achieve the same amount of power.
You will also need more amplifying channels and processing/delay-channels to configure the setup.
sub-arrays are NOT plug and play!
every venue needs new calculation and new decisions. there is no "best" solution!
adapt to the circumstances !