JBL VTX B18 Rigging Manual - Page 50

Selecting Spreader Bar Positions, EXAMPLES

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VTX B18 | Rigging Manual 11.4 SELECTING SPREADER BAR POSITIONS Each one of the two Mini Frame side arms includes 22 hole positions used for attaching the spreader bar. The position of the spread- er bar controls the overall site angle of the array. The further back the spreader bar is attached, the more down angle is generated and vice-versa. The exact position of the spreader bar for a given angle is determined using Line Array Calculator 3 software. Position 14 corresponds to the Center-of-Gravity position of the B18, and can be used to suspend B18s flat (straight). Position 14 is marked as such on the Mini Frame side arms. EXAMPLES: A• Spreader bar set to position 7, creating uptilt (in this case +29 degrees). B• Spreader bar set to position 20, creating downtilt (in this case for a single B18 -29 degrees). A B 50

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50
VTX B
18
| Rigging Manual
11.4
SELECTING SPREADER BAR POSITIONS
Each one of the two Mini Frame side arms includes 22 hole positions used for attaching the spreader bar. The position of the spread- er
bar controls the overall site angle of the array. The further back the spreader bar is attached, the more down angle is generated and
vice-versa. The exact position of the spreader bar for a given angle is determined using Line Array Calculator 3 software. Position 14
corresponds to the Center-of-Gravity position of the B18, and can be used to suspend B18s flat (straight). Position 14 is marked as such
on the Mini Frame side arms.
EXAMPLES:
•
Spreader bar set to position 7, creating uptilt (in this case +29 degrees).
•
Spreader bar set to position 20, creating downtilt (in this case for a single B18 -29 degrees).
A
B
A
B