JBL array series - Page 7

Tilt Guides for multi-tiered Arrays
Four examples of curved arrays are shown, each with a different suspension location, noted by heavy black dots.
Application notes are included. To calculate vertical coverage add 18” to the positive tilt angle and 18’ to the
negative tilt angle (disregard the “-I’ sign). If both aim angles are negative, add 36” to the difference.
Tilt Guide for 2 x 2 Array - (Suspended from holes 1 -A, shackle mounts connecting top tier to lower one are
towards front)
This configuration offers less difference in aim angles between the two tiers (+7” to -12O). Any options chosen
from Tables 1 and 2 will result in higher SPL, with more lobing.
Tilt angles for selected holes Direction of Shackle Location of Shackle
Mount on Truss Mount on top Array
I
1
1 2 I 3 I
C
+3O
+5”
+7O
Table 1
1 2
3
1 A 1 +7” 1 +2’ I -4” I
B
+2O
-3”
-8”
C
-3” -7”
-12O
Table 2