JBL VTX Series User Manual page 30

In some cases, non-symmetric arrays have to be used, especially when the arrays are arranged in blocks of four cabinets each. In these
cases, the coverage produced is always biased towards one direction, but strategic selection of placement can help shape the cover-
age to the specific need. As can be seen in the examples below, placing a rear-facing subwoofer at the bottom of an array is the least
effective. Rear-facing subwoofers can be placed at the top of an array to keep energy off the ceiling.
Example 3: Block of four B18s (F-F-R-F) 80 Hz
80
70
60
50
40
30
20
10
0
0 20 40 60
Example 4: Block of four B18s (F-R-F-F) 80 Hz
80
70
60
50
40
30
20
10
0
0 20 40 60
Example 5: Block of four B18s (F-F-F-R) 80 Hz
80
70
60
50
40
30
20
10
0
0 20 40 60
30
VTX B18 | User Manual
80 100 120 140
80 100 120 140
80 100 120 140
140
135
130
125
120
115
110
105
100
95
90
160
140
135
130
125
120
115
110
105
100
95
90
160
140
135
130
125
120
115
110
105
100
95
160