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6.2 Flying a SB18/KARA mixed array or a SB18 standalone array
6.2.1 Modeling and safety
Any loudspeaker assembly must be modeled before installation so as to ensure acoustical and mechanical conformity.
This can be done using L-ACOUSTICS
®
SOUNDVISION Software [3.4] which will assist the user to:
• Determine the number of required KARA enclosures (acoustic data not available for subwoofers).
• Calculate the array site angle and the inter-enclosure angles.
• Check the mechanical conformity of the loudspeaker assembly.
The KARA-MINIBU/KARA-MINIBUEX structure can nominally fly an array of up to 2 SB18/6 KARA or
4 SB18 along with all loudspeakers cables (refer to the KARA and SB18 User manuals [3.4]). However,
this maximum number can decrease in line with the array curvature.
ALWAYS refer to the mechanical data and warning indications provided in SOUNDVISION software
(Mechanical Data section) to verify the mechanical conformity of the loudspeaker assembly before
installation.
NEVER assemble an array containing an M-BUMP on top and a KARA-MINIBU/KARA-MINIBUEX between
SB18 and KARA for mechanical stress purposes (refer to the KARA Rigging procedures pack [3.4] for
M-BUMP description).
On the contrary, it is possible to assemble an array containing a KARA-MINIBU/KARA-MINIBUEX on top
and an M-BUMP between SB18 and KARA. In such a case, select the KARA-MINIBU/KARA-MINIBUEX
structure in SOUNDVISION to verify the mechanical conformity of the loudspeaker assembly.
The KARA, SB18, KARA-MINIBU, and KARA-MINIBUEX fully integrated rigging systems allow assembling the array
with no need for any external accessory.
The following first procedure describes how to fly a vertical SB18/KARA array using two KARA-MINIBU/KARA-
MINIBUEX rigging structures. It is recommended to assemble the KARA by successively adding arrays of 3 enclosures
(called ARRAY#1, ARRAY#2 in the order of appearance in the procedure). The second procedure describes how to
disassemble the array.
6.2.2 Array assembling procedure
All along the procedure:
STRICTLY follow the sequence of the successive steps.
SYSTEMATICALLY verify that each BLP is fully inserted.
SYSTEMATICALLY verify that the bolt is fully driven and secured by a safety pin on each shackle.
SYSTEMATICALLY verify that each bolt is fully driven on the KARA-MINIBUEX.
For clarity purposes the loudspeaker cabling procedure will not be described.
The loudspeaker cables will not be represented in the figures.
Use a strain relief to avoid mechanical stress at the connector locations due to cable weight.
The motor hooks or stingers will not be represented in the figures.
Required tools
Electric screwdriver with torque selector (N.m or in.lb
f
), 6 mm hex bit, 13 mm hex key.
Procedure
1. Assemble a KARA-MINIBU/KARA-MINIBUEX rigging structure as follows:
a. Turn the KARA-MINIBU so that the text of the identification plate is readable.
b. Position a first KARA-MINIBUEX on the laser plate side of the KARA-MINIBU by turning it feet pointing up
and inserting the stud into the slit of the KARA-MINIBU located near the laser plate.
c. Drive 3 bolts into the 3 holes shown in Figure 21 (6 mm hex bit, 13 mm hex key, 7 N.m/63 in.lb
f
).
d. Repeat the procedure with a second KARA-MINIBUEX on the other side of the KARA-MINIBU.
e. Attach the shackle(s) to the KARA-MINIBU [9.4] according to the chosen configuration [9.2]. Note: If the
array is intended to be flown in pullback configuration, attach a single shackle to the rear pullback hole [5.1].
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