4
The Vertical Line Array
The PSW-6 should be vertically arrayed in a line with
the drivers positioned as shown above.
When the PSW-6 is flown high in the air, the ground
image is nearly eliminated, so it takes two vertically
stacked PSW-6s to achieve the same power output and
directional control as a single PSW-6 on the ground
(assuming the ground is a very hard smooth surface).
Both the single cabinet on the ground and the array
pictured above are examples of vertical line arrays and
result in about a 6 dB SPL increase from a single cabi-
net in free space and exhibit the following polar re-
sponse:
Two Vertical Line Arrayed PSW-6s @ 40 HZ*.
Two Vertical Line Arrayed PSW-6s @ 60 HZ.
Two Vertical Line Arrayed PSW-6s @ 100 HZ.
Two Vertical Line Arrayed PSW-6s @ 125 HZ.
* Each small black dot on the polar plot represents a measurement taken outdoors in a free-field environment.
