JBL MTC-28H - Manual (Page 3)

5
Horizontal Array Assembly / Suspension Instructions
A 360 degree Cluster Module Using Three Brackets
Three horizontal brackets can be assembled together to form a 360 degree cluster module.
In this example, three MTC-28H brackets are assembled and used for mounting six Control
28 loudspeakers, however the instructions are similar for the assembly of the MTC-23H and
MTC-25H brackets.
Step 1.
Install two Invisiball™ mounts onto each horizontal bracket (Figure 2) using included
screws (item #2), flat washers (item #3) and lock nuts (item #4). Tighten the lock nuts for
a permanent installation.
Step 2.
Connect three horizontal brackets as shown in figure 2 using the included screws (item #5).
flat washers (items #6) and lock nuts (item #7). Tighten the lock nuts for a permanent
installation. The final assembly should appear as in Figure 3.
Step 3.
Follow the instructions included with your Control Contractor loudspeakers for mounting
the speakers onto the Invisiball™ mounting bases and for adjusting the aiming angles.
Step 4.
Suspend the bracket assembly only from the holes located in the center bend of each bracket
(Figure 3). Consult the building codes in your area to determine the proper materials and
procedures for suspending this bracket assembly.
Caution: Be sure the mounting points and the method of attaching the bracket assembly to
the mounting points are structurally capable of supporting the weight of the speakers and
the brackets with a 10:1 safety ratio. If you have any doubts of the capability, do not install
this bracket. Consult with a licensed suspension expert. Failure to properly install this
product could result In damage, injury or death.