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The following tables will assist in determining the proper number of parts to use when assembling HLA
speaker arrays.
To determine how many HLA-CB’s (Connecting Bars) are required:
# of HLA UNITS IN ARRAY NUMBER OF HLA-CB’s TO USE
8 4 pair (8 total connecting bars)
12 8 pair (16 total connecting bars)
16 12 pair (24 total connecting bars)
24 18 pair (36 total connecting bars)
To determine how many HLA-LB’s (Lifting Bars) are required:
HLA VERTICAL COLUMNS TO LIFT NUMBER OF HLA-LB’s TO USE
4 4 pair (8 total lifting bars)
6 6 pair (12 total lifting bars)
8 8 (16 total lifting bars)
10 10 pair (20 total lifting bars)
To determine how many ATM FlyWare Truss Modules and Shackles to use:
HLA VERTICAL COLUMNS TO LIFT # ATM MEGS-JBLHLA-T TO ORDER
4 4 Truss Modules + (16) 1/2 inch shackles
6 6 Truss Modules + (24) 1/2-inch shackles
8 8 Truss Modules + (32) 1/2-inch shackles
10 10 Truss Modules + (40) 1/2-inch shackles
HLA speaker assembly is designed to be quick and simple to assemble and suspend, but there are
certain requirements about how they can be used. HLA was designed to be used in vertical columns. The speakers
should not be suspended from the Spaceframe members, but rather must be only be suspended either from the
Lifting Bar or directly below another speaker using a Connecting Bar.
Up to ten degrees of forward vertical tilt of an array can be done. This will require ratchet straps for
adjusting the correct angle. Thread the strap through the bottom rear section of each Spaceframe in the bottom
row, then attach strap ends behind and outside the array.
While suspending other materials from an HLA array is not necessarily unsafe, careful consideration
should be made prior to doing so as there are many unforeseen approaches to suspending non-HLA products and
devices that could endanger the integrity of the speakers and their ability to suspend each other.
ATM supplies the part “MEGS-JBLHLA-T” 3x4 series truss module and it includes one upper hoist point
at no extra cost (which ATM calls a “MEGS-SUSPEND”).
The “MEGS-SUSPEND” can be seen on page 38 of the 1997 ATM catalog. It is the fitting on the left
side of the lowest of the four line drawings. It is available separately for spare or replacement, but is not shown
separately in the 1997 catalog.
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