47VTX B 18 | Rigging Manual10.4 - SELECTING SPREADER-BAR POSITIONSEach one of the two Mini Frame sidearms includes 22 hole positions used for attaching the spreader-bar. The position of the spread-erbar controls the overall side angle of the array. The further back the spreader-bar is attached the more down angle is generated andvice-versa. The exact position of the spreader bar for a given angle is determined by using the JBL Line Array Calculator 3 software.Position 14 corresponds to the Center-of-Gravity position of the B18, and it can be used to suspend B18s flat (straight). Position 14 ismarked as such on the Mini Frame sidearms.EXAMPLES:• Spreader-bar set to position 7 which creates up-tilt (in this case +29-degrees)• Spreader-bar set to position 20 which creates down-tilt (in this case for a single B18 -29-degrees)ABA B
