Electro-Voice XLC 127, Руководство по монтажу

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Electro-Voice XLC Touring Addendum 14
2. Rigging and Flying Techniques
2.2 Rigging the XLC Grids and the XLC-EB
The XLC-EB extender beam is used to hang a single column of loudspeaker systems where more vertical
tilt angle is required than could be achieved from only a grid. The XLC grid is attached to an XLC-EB as
shown in Figure 5a. Note that the orientation of the XLC-EB will change depending on whether the entire
array needs to tilt up or down. If the entire array needs to be tilted down, Hole #1 in the XLC-EB must be
pointed away from the audience (upstage). If the entire array needs to be tilted up, Hole #1 in the XLC-
EB must be pointed towards the audience (downstage). Because the XLC-EB extends beyond the end of
the grid, greater tilt angles for the array (either up or down) can be achieved than would be possible with
just a grid alone. In fact, for most applications, the XLC-EB eliminates the need for a pull back for severe
downward angles.
An XLC grid must always be attached to the XLC-EB using two spreader bars, as shown in Figure 4a.
One spreader bar must be attached to the grid side arms at the first hole at the front and the other at the
last hole at the rear. The grid spreader bars are then secured to the XLC-EB yoke assemblies.
To attach a grid to the XLC-EB, remove the quick-release pins from the two yoke assemblies that will
support the grid. Position the grid underneath the XLC-EB and slide the two yokes over the two spreader
bars. Insert the quick-release pins through each yoke and spreader bar. To make sure that the quick-re-
lease pins are fully locked into the yoke, always push the pins in all the way in so that spring-loaded balls
are visible at the opposite side of the yoke.
The XLC-EB is compatible with both the A1 and B1 grids. Note that the B1 grids have three holes to
chose from in the middle of the spreader bar, while the A1 only has one hole. See the previous section
that describes which holes to use for the B1 grid and which loudspeaker configurations are compatible
with the A1 grid.
ALWAYS MAKE SURE THAT EACH QUICK-RELEASE PIN SECURING EACH GRID SPREAD-
ER BAR IS FULLY LOCKED IN EACH YOKE.
Figure 5a:
XLC-EB rigging assembly Note: Extender Beam
shown cutaway for better
conceptualization and
clarity.
Quick-Release Pin
Quick-Release Pin
Extender Beam
Pickup Ring
Centering Ring
Yoke
Grid