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An Effective Rigging Solution
By Kathy Patrician
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Rigging a large loudspeaker cluster can often be the toughest part
of a sound system installation.
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But Bruce Jensen and the crew at B and R Audio recently discovered
an improved solution prior to flying a nine-loudspeaker, dual-tiered
central cluster that heads a new system at the 1,200-capacity
worship sanctuary of West Asheville Baptist Church, located
in Asheville, NC.
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Previously, B and R Audio, also based in Asheville, had relied
upon ad hoc rigging, usually employing wire rope for
flying clusters and then suffering through the tedious and time-consuming
process of finessing each loudspeaker into optimum position and
angle. I wasnt looking forward to doing that again,
Jensen flatly states.
Enter Todd Foster of Quest Marketing, who introduced Jensen to the
Polar Focus Zbeam, a universal audio rigging
system that removes many of the restrictions of conventional hardware
while also simplifying and speeding the rigging process.
Each Zbeam, capable of supporting up to 880 pounds, works in tandem
with Polar Focus Adjustable Tilt Cable Kits, and together they provide
total control of each loudspeaker before being grouped into a cluster.
Once the loudspeaker is attached, the cable kit makes it possible
to change the tilt angle of the loudspeaker quickly, accurately
and safely.
Jensen decided to utilize the Zbeam/cable kit combo for this project,
where the single central cluster is now deployed to supply primary
coverage to the sanctuary. The cluster is comprised of a row of
four Eastern Acoustic
Works (EAW) AS460 mid/high loudspeakers arranged in an arc,
with a matching arc beneath made up of four EAW AS660 full-range
loudspeakers. Another AS460, serves as a choir monitor, positioned
behind the arc and firing downward at the platform.
Each loudspeaker is attached to its own Zbeam via the cable kits,
and in turn, all Zbeams are secured to a custom Polar Focus steel
grid, connected with chain slings to two roof trusses. The loading
pattern of these roof trusses was approved by the projects
structural engineer prior to installation. The loudspeakers, custom
grid and flying hardware are painted white, fitting the aesthetic
of the sanctuary. (Zbeams are available in both anodized black and
white powder coated as stock items.)
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