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ELECTRO-VOICE
®
X-Line Very Compact
TM
Rigging Manual
Specifically, this means that, when the XLD Grid is used in any of the configurations shown in
Figure 15a, the structural rating of the grid will always exceed the structural ratings of either the
XLD281 or XS212 loudspeaker systems. Thus, if the structural rating is not exceeded for any
loudspeaker in the column, the structural rating of the grid will not be exceeded.
Likewise, when the XLE Grid is used in any of the configurations shown in Figure 15b, the
structural rating of the grid will always exceed the structural ratings the XLE181 loudspeaker
systems. Thus, if the structural rating is not exceeded for any loudspeaker in the column, the
structural rating of the grid will not be exceeded.
When two side-to-side pickup points, or two front-to-back pickup points are used to suspend an
XLD Grid or XLE Grid, the maximum included angle between the pickup points shown in Figures
15a and 15b must not be exceeded.
CBEAM Complex Structural-Strength Ratings
The CBEAM can be used as a coupler beam to suspend a column of XS212 loudspeaker systems
behind a column of either XLD281 or XLE181 loudspeaker systems. It can also be used as an
extender beam with a single column of either XLD281 or XLE181 loudspeaker systems to enable
greater vertical angle tilt of the column than that which could be achieved with a grid alone.
The structural strength of the of a column of loudspeakers suspended from a CBEAM is a function
of the strength of the beam frame assembly, the beam yoke assemblies, the beam ring
assemblies, the grid spreader bar assemblies, the grid sidearm assemblies, the front and back
rigging attachment to the XLVC enclosures, the strength of all of the quick-release attachment
pins, the loudspeaker array configuration and the vertical tilt angle of the beam. This is a complex
mechanical system, where the strength of the overall system is determined by the strength of the
weakest component in the system.
The Electro-Voice engineers have designed the CBEAM to be stronger than the XLD Grids and
XLE Grids, which are in turn stronger than the XLVC loudspeaker systems over the entire
mechanical operating range of the loudspeaker systems. This makes the structural analysis of the
overall system (beam, grids and loudspeaker enclosures) much easier because the structural
rating of the entire mechanical system will be determined solely by the structural strength of the
loudspeaker systems.
Specifically, this means that, when the CBEAM is used in any of the configurations shown in
Figure 15c, the structural rating of the beam will always exceed the structural ratings of either the
XLD281 or XS212 loudspeaker systems. Thus, if the structural rating is not exceeded for any
loudspeaker in the column, the structural rating of the beam will not be exceeded.
When suspending a CBEAM, the maximum included angle of the pickup points relative to the
beam shown in Figure 15c must not be exceeded. Note that the maximum angle for the pickup
rings is less for holes 1 and 30 because the pickup rings will contact the spacer bars at greater
angles.
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