Kara
owner's manual (EN)
Document reference: Kara owner's manual (EN) version 1.0 Distribution date: October 24, 2019
© 2019 L-Acoustics. All rights reserved.
No part of this publication may be reproduced or transmitted in any form or by any means without the express written consent of the publisher.
Contents |
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Safety................................................................................................................................................................ |
6 |
Instructions................................................................................................................................................ |
6 |
Introduction........................................................................................................................................................ |
8 |
Kara modular line source.......................................................................................................................... |
8 |
How to use this manual............................................................................................................................ |
8 |
System components............................................................................................................................................. |
9 |
Loudspeaker cables................................................................................................................................. |
10 |
Rigging elements..................................................................................................................................... |
11 |
Electro-acoustical description.............................................................................................................................. |
12 |
Directivity............................................................................................................................................... |
12 |
Preset description.................................................................................................................................... |
13 |
Connectors............................................................................................................................................. |
14 |
Rigging system description................................................................................................................................. |
16 |
Kara...................................................................................................................................................... |
16 |
SB18..................................................................................................................................................... |
17 |
Rigging elements..................................................................................................................................... |
18 |
M-BUMP....................................................................................................................................... |
18 |
KARA-MINIBU............................................................................................................................... |
19 |
M-BAR.......................................................................................................................................... |
20 |
M-JACK, KARA-ANGARMEX........................................................................................................... |
21 |
KARA-MINIBUEX, KARA-ANGARMEX.............................................................................................. |
23 |
KARA-PULLBACK............................................................................................................................ |
24 |
Transportation......................................................................................................................................... |
25 |
Flight-case..................................................................................................................................... |
25 |
Mechanical safety............................................................................................................................................. |
26 |
Loudspeaker con gurations................................................................................................................................ |
28 |
Line source............................................................................................................................................. |
28 |
Line source with low-frequency element........................................................................................... |
29 |
Line source element................................................................................................................................. |
34 |
Inspection and preventive maintenance............................................................................................................... |
35 |
How to do preventive maintenance.......................................................................................................... |
35 |
Rigging part inspection........................................................................................................................... |
36 |
Mechanical system overview.................................................................................................................... |
36 |
Mixed Kara array with SB18 and M-BUMP..................................................................................... |
37 |
3
Mixed Kara array with SB18, KARA-MINIBU/KARA-MINIBUEX and KARA-PULLBACK |
...........................38 |
Stacked Kara array with M-BUMP, M-JACK and KARA-ANGARMEX................................................... |
39 |
Rigging check......................................................................................................................................... |
40 |
Inspection references..................................................................................................................... |
43 |
Acoustical check............................................................................................................................................... |
46 |
Rigging procedures........................................................................................................................................... |
50 |
Flying a Kara standalone array................................................................................................................ |
50 |
Using M-BUMP.............................................................................................................................. |
50 |
Using KARA-MINIBU...................................................................................................................... |
60 |
Flying an SB18/Kara mixed array or an SB18 standalone array................................................................. |
69 |
Using M-BUMP.............................................................................................................................. |
69 |
Using KARA-MINIBU...................................................................................................................... |
80 |
Stacking a Kara standalone array............................................................................................................ |
90 |
Using M-BUMP.............................................................................................................................. |
90 |
Using KARA-MINIBU.................................................................................................................... |
102 |
Stacking an SB18/Kara mixed array or an SB18 standalone array........................................................... |
113 |
Using M-BUMP............................................................................................................................ |
113 |
Using KARA-MINIBU.................................................................................................................... |
122 |
Connection to LA ampli ed controllers.............................................................................................................. |
136 |
Corrective maintenance................................................................................................................................... |
138 |
Tools.................................................................................................................................................... |
138 |
Kara.................................................................................................................................................... |
139 |
SB18................................................................................................................................................... |
155 |
M-BUMP............................................................................................................................................... |
165 |
M-BAR................................................................................................................................................. |
169 |
KARA-MINIBU....................................................................................................................................... |
171 |
KARA-MINIBUEX................................................................................................................................... |
173 |
Speci cations................................................................................................................................................. |
176 |
APPENDIX A: Installing an inclinometer............................................................................................................ |
187 |
APPENDIX B: Flown array options and site angle setting.................................................................................... |
189 |
Using M-BUMP..................................................................................................................................... |
189 |
Using KARA-MINIBU............................................................................................................................. |
192 |
APPENDIX C: Stacked array options and site angle setting................................................................................. |
195 |
Using M-BUMP..................................................................................................................................... |
195 |
Using KARA-MINIBU............................................................................................................................. |
197 |
4
APPENDIX D: Safety pin removal and insertion................................................................................................. |
199 |
APPENDIX E: Recommendation for speaker cables............................................................................................. |
200 |
5
Safety
Safety
Instructions
Inspect the system before any deployment.
Perform safety related checks and inspections before any deployment.
Perform preventive maintenance at least once a year.
Refer to the preventive maintenance section for a list of actions and their periodicity. Insuf cient upkeep of the product can void the warranty.
If any safety issue is detected during inspection, do not use the product before performing corrective maintenance.
Check for issues. A rigging system part or fastener is missing or loose. A rigging system part exhibits: bends, breaks, broken parts, corrosion, cracks, cracks in welded joints, deformation, denting, wear, holes. A safety cue or label is missing. A loose part is not adequately secured.
Never incorporate equipment or accessories not approved by L-Acoustics.
Read all the related PRODUCT INFORMATION documents shipped with the products before exploiting the system.
Do not store the product on an unstable cart, stand, tripod, bracket, or table.
Beware of sound levels.
Do not stay within close proximity of loudspeakers in operation.
Loudspeaker systems are capable of producing very high sound pressure levels (SPL) which can instantaneously lead to permanent hearing damage to performers, production crew and audience members. Hearing damage can also occur at moderate level with prolonged exposure to sound.
Check the applicable laws and regulations relating to maximum sound levels and exposure times.
Work with quali ed personnel for rigging the system
Installation should only be carried out by quali ed personnel that are familiar with the rigging techniques and safety recommendations outlined in this manual.
Ensure personnel health and safety
During installation and set-up personnel must wear protective headgear and footwear at all times. Under no circumstances is personnel allowed to climb on a loudspeaker assembly.
Respect the Working Load Limit (WLL) of third party equipment.
L-Acoustics is not responsible for any rigging equipment and accessories provided by third party manufacturers.
Verify that the Working Load Limit (WLL) of the suspension points, chain hoists and all additional hardware rigging accessories is respected.
Respect the maximum con gurations and the recommended safety precautions.
For safety issue, respect the maximum con gurations outlined in this manual. To check the conformity of any con guration in regards with the safety precautions recommended by L-Acoustics, model the system in Soundvision and refer to the warnings in Mechanical Data section.
Be cautious when ying a loudspeaker con guration.
Before installing/raising the product, check each individual element to make sure that it is securely fastened to the adjacent element. Always verify that no one is standing underneath the product when it is being installed/raised. Never leave the product unattended during the installation process.
As a general rule, L-Acoustics recommends the use of secondary safety at all times.
Be cautious when ground-stacking a loudspeaker array.
Do not stack the loudspeaker array on unstable ground or surface. If the array is stacked on a structure, platform, or stage, always check that the latter can support the total weight of the array.
As a general rule, L-Acoustics recommends the use of safety straps at all times.
6 |
Kara owner's manual (EN) version 1.0 |
Safety
Risk of falling objects
Verify that no unattached items remain on the product or assembly.
Risk of tipping
Remove all rigging accessories before transporting a product or an assembly.
Take into account the wind effects on dynamic load.
When a loudspeaker assembly is deployed in an open air environment, wind can produce dynamic stress to the rigging components and suspension points.
If the wind force exceeds 6 bft (Beaufort scale), lower down and/or secure the product or the assembly.
Intended use
This system is intended for use by trained personnel for professional applications.
As part of a continuous evolution of techniques and standards, L-Acoustics reserves the right to change the speci cations of its products and the content of its documents without prior notice.
Check www.l-acoustics.com on a regular basis to download the latest document and software updates.
Read the maintenance section of this document before servicing the product.
Do not expose the product to extreme conditions.
Do not expose the product to moisture (rain, mist, sea spray, steam, humidity, condensation…) or excessive heat (direct sun, radiator…) for a long period of time.
For more information, refer to the Product protection ratings document, available on the website.
Contact L-Acoustics for advanced maintenance.
Any unauthorized maintenance operation will void the product warranty.
Kara owner's manual (EN) version 1.0 |
7 |
Introduction
Introduction
Kara modular line source
The Kara modular line source element has an operating frequency bandwidth from 55 Hz to 20 kHz. This response can be lowered down to 32 Hz with the addition of the SB18 low frequency extension.
Kara features a 2-way, bi-ampli ed design and is equipped with 2 × 8" neodymium LF speakers in a bass-re ex tuned enclosure. The HF section features a 3" neodymium diaphragm driver coupled to a DOSC waveguide.
The K-shaped coplanar transducer con guration generates a symmetric horizontal coverage of 110° without secondary lobes over the entire frequency range. The combination of coplanar symmetry and DOSC waveguide allows the system to ful l the 5 WST criteria. Any Kara line source can be curved up to a maximum of 10˚ for each element without breaking the inter-element acoustic coupling.
The Kara enclosure is made of premium grade Baltic birch plywood to ensure maximum acoustical and mechanical integrity. The 4 point rigging system allows suspending up to 24 Kara in a single array.
The Kara system is driven by the dedicated LA8 ampli ed controller which ensures active system linearization, intelligent transducer protection, and optimization for 3 operating modes:
•The “FULL RANGE” mode for standalone Line Source arrays or distributed applications
•The “HIGH-PASS” mode for lls or for Kara as a K1 down ll
•The “LOW EXTENSION” mode for Kara/SB18 con gurations.
The performance of Kara depends upon the choice of electronic preset and physical system con guration.
How to use this manual
The Kara owner's manual is intended for all actors involved in the system design, implementation, preventive and corrective maintenance of the Kara system. It must be used as follows:
1.Read the technical description for an overview of all system elements, their features, and their compatibilities.
•Electro-acoustical description (p.12)
•Rigging system description (p.16)
2.Prepare the system con guration. Consider the mechanical limits and the available acoustical con gurations.
•Mechanical safety (p.26)
•Loudspeaker con gurations (p.28)
3.Before rigging the system, perform mandatory inspections and functional checks.
•Inspection and preventive maintenance (p.35)
4.To deploy the system, follow the step-by-step rigging instructions and refer to the cabling schemes.
•Rigging procedures (p.50)
•Connection to LA ampli ed controllers (p.136)
The Corrective maintenance (p.138) section contains the operations authorized for the end user. Performing another operation exposes to hazardous situations.
For advanced maintenance, contact your L-Acoustics representative.
As part of a continuous evolution of techniques and standards, L-Acoustics reserves the right to change the speci cations of its products and the content of its document without prior notice. Please check www.l-acoustics.com on a regular basis to download the latest document and software updates.
Contact information
For information on advanced corrective maintenance:
•contact your Certi ed Provider or your L-Acoustics representative
•for Certi ed Providers, contact the L-Acoustics customer service: customer.service@l-acoustics.com
8 |
Kara owner's manual (EN) version 1.0 |
System components
Symbols
The following symbols are used in this document:
This symbol indicates a potential risk of harm to an individual or damage to the product.
It can also notify the user about instructions that must be strictly followed to ensure safe installation or operation of the product.
This symbol noti es the user about instructions that must be strictly followed to ensure proper installation or operation of the product.
This symbol noti es the user about complementary information or optional instructions.
System components
Loudspeaker enclosures
Kara |
2-way modular WST enclosure |
SB18 |
High power compact subwoofer: 1 x 18'' |
SB28 |
High power subwoofer: 2 x 18'' |
KS28 |
Flyable subwoofer 2 x 18'' |
Powering and driving system |
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LA4X / LA8 / LA12X |
Ampli ed controller with DSP, preset library and networking capabilities |
LA-RAK |
Touring rack containing three LA8 and power, audio and network distribution |
LA-RAK II |
Touring rack containing three LA12X, LA-POWER II for power distribution and LA-PANEL II for |
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audio and network distribution |
Refer to the LA4X / LA8 / LA12X user manual for operating instructions.
Kara owner's manual (EN) version 1.0 |
9 |
System components |
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Loudspeaker cables |
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SP cables |
4-point speakON loudspeaker cables (4 mm² gauge) |
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SP cables come in four sizes: SP.7 (0.7 m/2.3 ft), SP5 (5 m/16.4 ft), SP10 (10 m/32.8 ft) and |
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SP25 (25 m/82 ft) |
SP-Y1 |
breakout cable for two passive enclosures (2.5 mm² gauge) provided with a CC4FP adapter |
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4-point speakON to 2 × 2-point speakON |
DO |
8-point PA-COM loudspeaker cables (4 mm² gauge) |
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DO cables come in three sizes: DO.7 (0.7 m/2.3 ft), DO10 (10 m/32.8 ft) and DO25 |
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(25 m/82 ft) |
DOSUB-LA8 |
breakout cable for four passive enclosures (4 mm² gauge) |
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8-point PA-COM to 4 × 2-point speakON |
DOFILL-LA8 |
breakout cable for two 2-way active enclosures (4 mm² gauge) |
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8-point PA-COM to 2 x 4-point speakON |
DO3WFILL |
breakout cable for one 2-way active enclosure and two passive enclosures (4 mm² gauge) |
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8-point PA-COM to 1 x 4-point speakON and 2 x 2-point speakON |
Information about the connection of the enclosures to the LA ampli ed controllers is given in this document.
Refer to the LA4X / LA8 / LA12X user manual for detailed instructions about the whole cabling scheme, including modulation cables and network.
Rigging elements
M-BUMP
M-BAR
M-JACK KARA-ANGARMEX KARA-MINIBU KARA-MINIBUEX KARA-PULLBACK
Bumper for ying or stacking KARA/SB18 Extension bar for rigging frame
4 tilt adjustment screw jacks with 2 angle bar extensions for stacked M-BUMP 2 angle bar extension for KARA bumper
Mini bumper for ying 6 KARA
Extension bars for ying/stacking SB18/KARA pullback plate for Kara
Software applications
Soundvision 3D acoustical and mechanical modeling software
LA Network Manager Software for remote control and monitoring of ampli ed controllers
Refer to the Soundvision help.
Refer to the LA Network Manager help.
Loudspeaker cables
1 m
0.7 m / 5 m / 10 m / 25 m
CH(1)
CH(2)
SP.7 / SP5 / SP10 / SP25 |
SP-Y1 |
10 |
Kara owner's manual (EN) version 1.0 |
System components
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5 m |
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SPK1 |
0.7 m / 10 m / 25 m |
SPK2 |
SPK3
SPK4
DO.7 / DO10 / DO25 |
DOSUB-LA8 |
3.5 m |
3.5 m |
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2W CH(A) |
2WAY |
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SUB1 |
2W CH(B) |
SUB2 |
DOFILL-LA8 |
DO3WFILL |
Rigging elements
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KARA- |
M-BUMP |
M-BAR |
M-JACK |
ANGARMEX |
KARA-MINIBU |
KARA-MINIBUEX |
KARA-PULLBACK |
Kara owner's manual (EN) version 1.0 |
11 |
Electro-acoustical description
Electro-acoustical description
Directivity
Kara features a V-shaped transducer arrangement coupled with a DOSC waveguide that generates a horizontal directivity pattern of 110°.
Kara beamwidth
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180 |
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160 |
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140 |
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120 |
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100 |
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80 |
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60 |
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40 |
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(°) |
20 |
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Angle |
0 |
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-20 |
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-40 |
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-60 |
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-80 |
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-100 |
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-120 |
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-140 |
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-160 |
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-180100 |
1 000 |
10 000 |
Frequency (Hz)
Dispersion angle diagram of an array of six enclosures with 0° inter-enclosure angle, using lines of equal sound pressure at -3 dB, -6 dB, -12 dB.
12 |
Kara owner's manual (EN) version 1.0 |
Electro-acoustical description
Preset description
[KARA]
loudspeaker elements |
outputs |
channels |
routing |
gain |
delay |
polarity |
mute |
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LF |
OUT 1 |
LF |
IN A |
0 dB |
0 ms |
+ |
ON |
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HF |
OUT 2 |
HF |
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ON |
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LF |
OUT 3 |
LF |
IN A |
0 dB |
0 ms |
+ |
ON |
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HF |
OUT 4 |
HF |
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ON |
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[KARA_FI] |
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loudspeaker elements |
outputs |
channels |
routing |
gain |
delay |
polarity |
mute |
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LF |
OUT 1 |
LF |
IN A |
0 dB |
0 ms |
+ |
ON |
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HF |
OUT 2 |
HF |
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ON |
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LF |
OUT 3 |
LF |
IN B |
0 dB |
0 ms |
+ |
ON |
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HF |
OUT 4 |
HF |
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ON |
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[KS28_60] [KS28_100] [SB28_60] [SB28_100] [SB18_60] [SB18_100]
outputs |
channels |
routing |
gain |
delay |
polarity |
mute |
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OUT 1 |
SB |
IN A |
0 dB |
0 ms |
+ |
ON |
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OUT 2 |
SB |
IN A |
0 dB |
0 ms |
+ |
ON |
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OUT 3 |
SB |
IN A |
0 dB |
0 ms |
+ |
ON |
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OUT 4 |
SB |
IN A |
0 dB |
0 ms |
+ |
ON |
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[KS28_60_C] [KS28_100_C] [SB28_60_C] [SB28_100_C] [SB18_60_C] [SB18_100_C]
loudspeaker elements |
outputs |
channels |
routing |
gain |
delay |
polarity |
mute |
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SR |
OUT 1 |
SR |
IN A |
0 dB |
0 ms |
+ |
ON |
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SB |
OUT 2 |
SB |
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ON |
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SB |
OUT 3 |
SB |
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ON |
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SB |
OUT 4 |
SB |
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ON |
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Kara owner's manual (EN) version 1.0 |
13 |
Electro-acoustical description
Connectors
SpeakON connectors can be used interchangeably as IN or LINK connector.
Kara
2 × 4-point speakON
Internal pinout for L-Acoustics 2-way active enclosures
speakON points |
1 + |
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1 - |
2 + |
2 - |
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Transducer connectors |
LF + |
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LF - |
HF + |
HF - |
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SB18
2 × 4-point speakON
14 |
Kara owner's manual (EN) version 1.0 |
Electro-acoustical description
Weight: 93 kg / 205 lb
SB28
1 × 4-point speakON
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K S 2 |
8 |
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Weight: 79 kg / 174 lb |
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1k = IN k |
SAFE USE: |
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1 - = IN - |
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Znom. = 4 Ω |
16 KS28 |
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FOROTHERCONFIGURATIONS,CHECKMECHANICAL |
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SAFETYWITHSOUNDVISIONSOFTWARE |
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USEONLYWITHL-ACOUSTICSAMPLIFIEDCONTROLLERS. |
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Readmanualandsafety |
MadeinFrance |
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instructionsbeforeuse |
EuropeanCommunity |
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KS28 |
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1 × 4-point speakON |
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Internal pinout for L-Acoustics subwoofers |
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speakON points |
1 + |
1 - |
2 + |
2 - |
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Transducer connectors |
LF + |
LF - |
Not linked |
Not linked |
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Kara owner's manual (EN) version 1.0 |
15 |
Rigging system description
Rigging system description
Kara
Kara features a four-point rigging system composed of two adjustable rigging arms secured with ball-locking pins and two lodgings with ball-locking pins on both sides of the enclosure.
Kara can be connected to other Kara enclosures or to dedicated rigging accessories. The inter-enclosure angle can be set between 0° and 10°.
16 |
Kara owner's manual (EN) version 1.0 |
Rigging system description
SB18
For more information on rigging SB18, refer to the SB18 rigging manual.
SB18 has a four-point rigging system with two rigging arms and two pins on each side.
storage position |
rigging position |
rigging arm (x4)
pin (x4)
SB18 features a 35 mm pole socket.
Kara owner's manual (EN) version 1.0 |
17 |
Rigging system description
Rigging elements
M-BUMP
Rigging structure
The L-Acoustics M-BUMP rigging structure has been designed to y or stack the Kara enclosures as a variable-curvature, vertical line source array. M-BUMP also allows Kara to be rigged to an SB18 subwoofer array.
M-BUMP also can y straight vertical SB18 arrays.
The M-BUMP is a square frame tted with the following elements:
•Four 5/16" R-BLP (round-shaped ball-locking pins) for Kara rigging.
•Four rotating arms with 5/16” T-BLP (T-shaped ball-locking pins) for SB18 rigging.
•One laser support plate with four bolts for optional laser/inclinometer device mounting (refer to Installing an inclinometer (p.187)).
•Two shackles tted with 19 mm/0.75 inch-diameter bolts and safety pins.
Refer to M-BUMP rigging options (p.189) for distance between shackles.
18 |
Kara owner's manual (EN) version 1.0 |
Rigging system description
KARA-MINIBU
Rigging structure
The L-Acoustics KARA-MINIBU rigging structure has been designed to y or stack the Kara enclosures as a variablecurvature, vertical line source array. KARA-MINIBU also allows Kara to be attached to an SB18 subwoofer array.
KARA-MINIBU also can y straight vertical SB18 arrays.
The KARA-MINIBU is a rectangular frame tted with the following elements:
•Four 5/16” R-BLP (round-shaped ball-locking pins) for Kara rigging.
•One laser support plate with four bolts for optional laser/inclinometer device mounting. (refer to Installing an inclinometer (p.187))
•Two shackles tted with 12 mm/0.47 inch-diameter bolts and safety pins.
•17 shackle holes for rigging.
•2 shackle holes for pullback con gurations.
Refer to KARA-MINIBU rigging options (p.192) for distance between shackles.
Kara owner's manual (EN) version 1.0 |
19 |
Rigging system description
M-BAR
Extension bar
The L-Acoustics M-BAR extension bar is a complementary rigging element for M-BUMP. Optionally used as a single element or in pair in own con gurations, it will extend the site angle capability of Kara and SB18 arrays. In stacked con gurations, its use is required in pairs as part of the stacking platform (see M-JACK, KARA-ANGARMEX (p.21)).
The M-BAR is a bar tted with the following elements:
•Two 3/8” T-BLP for M-BUMP rigging.
•Two shackles tted with 19 mm/0.75 inch-diameter bolts and safety pins.
Refer to M-BUMP rigging options (p.189) for distance between shackles.
M-BAR
One M-BAR mounted to M-BUMP
Two M-BAR mounted to M-BUMP
20 |
Kara owner's manual (EN) version 1.0 |
Rigging system description
M-JACK, KARA-ANGARMEX
Stacking platform (with optional angle arm extensions)
The L-Acoustics M-JACK are four feet to be used along with one M-BUMP and two M-BAR so as to form a stacking platform for a variable-curvature, vertical Kara line source array.
The L-Acoustics KARA-ANGARMEX are two angle arm extensions providing extra 10° downwards site angle for the bottom Kara in stacked con gurations.
Two KARA-ANGARMEX are also included in the M-JACK package.
The M-JACK package comprises the following elements:
•Four feet tted with height-adjustment and locking system.
•Two angle arm extensions with 5/16” T-BLP.
The KARA-ANGARMEX package comprises two angle arm extensions with 5/16” T-BLP.
Kara owner's manual (EN) version 1.0 |
21 |
Rigging system description
KARA-ANGARMEX attached to M-BUMP
The KARA-ANGARMEX angle arm extensions are provided with two slings and xation material to be permanently attached to the M-BUMP. Attach the slings to the holes shown in the gure below and respect the orientation:
22 |
Kara owner's manual (EN) version 1.0 |
Rigging system description
KARA-MINIBUEX, KARA-ANGARMEX
Rigging structure
The L-Acoustics KARA-MINIBUEX is a set of two complementary rigging plates for KARA-MINIBU to adapt to the SB18 enclosure or to stack Kara.
The L-Acoustics KARA-ANGARMEX is a set of two angle arm extensions providing extra 10° downwards site angle for the bottom Kara in stacked con gurations.
The KARA-MINIBUEX package comprises the following elements:
•Two rigging plates featuring two rubber feet each.
•Six bolts to assemble the KARA-MINIBU frame and two KARA-MINIBUEX plates.
•Four 5/16” T-BLP (T-shaped ball-locking pins) to attach an SB18 enclosure to the KARA-MINIBU/KARA-MINIBUEX structure.
The KARA-ANGARMEX package comprises two angle arm extensions with 5/16” T-BLP.
Kara owner's manual (EN) version 1.0 |
23 |
Rigging system description
KARA-PULLBACK
The L-Acoustics KARA-PULLBACK rigging accessory will allow setting the Kara array in a pullback con guration. It connects to the bottom enclosure of the array and to the hook or stinger of an additional motor.
The KARA-PULLBACK is a plate on which is xed one shackle tted with 19 mm/0.75 inch-diameter bolt and a safety pin.
24 |
Kara owner's manual (EN) version 1.0 |
Rigging system description
Transportation
Flight-case
It is recommended to use a ight-case designed to ship a 3-Kara vertical array. It should contain foam inserts to prevent array movement and the tray should be tted with 2 wedges to keep the array vertical.
Complete ight-case |
Tray supporting a 3-Kara array |
Tray detail
Kara owner's manual (EN) version 1.0 |
25 |
Mechanical safety
Mechanical safety
Flown con gurations
The Kara rigging system complies with 2006/42/EC: Machinery Directive. It has been designed following the guidelines of BGV-C1.
2006/42/EC: Machinery Directive speci es a safety factor of 4 against the rupture. The own deployments described in this manual achieve a safety factor of 4 or more.
Refer to Soundvision for the safety factor of a speci c deployment.
The safe limit gives the maximum number of elements for which the safety factor is compliant with the 2006/42/ EC: Machinery Directive, within the use de ned in this manual and regardless of the other deployment parameters (site angles, inter-enclosure angles, etc.).
The maximum limit gives the maximum number of elements for which the safety factor can be compliant with the 2006/42/EC: Machinery Directive, when the other deployment parameters provide the best mechanical conditions.
For mixed arrays refer to your Soundvision model.
Kara
con guration |
rigging accessory |
maximum limit |
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own |
M-BUMP + M-BAR (optional) |
24 |
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KARA-MINIBU |
6 |
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pullback |
M-BUMP + KARA-PULLBACK |
12 |
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KARA-MINIBU + KARA-PULLBACK |
6 |
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SB18 |
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con guration |
rigging accessory |
maximum limit |
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own |
M-BUMP + M-BAR (optional) |
16 |
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KARA-MINIBU + KARA-MINIBUEX |
4 |
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Kara + SB18 |
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con guration |
rigging accessory |
maximum / safe limit |
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own |
M-BUMP + M-BAR (optional) |
12 Kara + 4 SB18 |
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KARA-MINIBU + KARA-MINIBUEX |
6 Kara + 2 SB18 |
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M-BUMP + KARA-PULLBACK |
9 Kara + 3 SB18 |
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pullback |
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KARA-MINIBU + KARA-MINIBUEX + KARA- |
6 Kara + 2 SB18 |
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PULLBACK |
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Other con gurations |
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Kara |
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con guration |
rigging accessory |
maximum / safe limit |
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M-BUMP + M-BAR + M-JACK + KARA- |
9 |
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ANGARMEX (optional) |
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platform-stacked |
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KARA-MINIBU + KARA-MINIBUEX + KARA- |
6 |
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ANGARMEX (optional) |
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26 |
Kara owner's manual (EN) version 1.0 |
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Mechanical safety |
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SB18 |
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con guration |
rigging accessory |
maximum / safe limit |
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M-BUMP + M-BAR + M-JACK + KARA- |
4 |
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platform-stacked |
ANGARMEX (optional) |
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KARA-MINIBU + KARA-MINIBUEX |
6 |
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ground-stacked |
no rigging accessory |
4 |
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Kara + SB18 |
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con guration |
rigging accessory |
maximum / safe limit |
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platform-stacked |
M-BUMP |
6 Kara + 2 SB18 |
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KARA-MINIBU + KARA-MINIBUEX |
6 Kara + 4 SB18 |
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ground-stacked |
no rigging accessory |
9 Kara + 4 SB18 |
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Assessing mechanical safety
Mechanical safety of the rigging system
Before any installation, always model the system in Soundvision and check the Mechanical Data section for any stress warning or stability warning.
In order to assess the actual safety of any array con guration before implementation, refer to the following warnings:
Rated working load limit (WLL) is not enough
The rated WLL is an indication of the element resistance to tensile stress. For complex mechanical systems such as loudspeaker arrays, WLLs cannot be used per se to determine the maximum number of enclosures within an array or to assess the safety of a speci c array con guration.
Maximum pullback angle
If a pullback accessory is available, the pullback angle must not exceed a 90° negative site angle.
Mechanical modeling with Soundvision
The working load applied to each linking point, along with the corresponding safety factor, will depend on numerous variables linked to the composition of the array (type and number of enclosures, splay angles) and the implementation of the ying or stacking structure (number and location of ying points, site angle). This cannot be determined without the complex mechanical modeling and calculation offered by Soundvision.
Assessing the safety with Soundvision
The overall safety factor of a speci c mechanical con guration always corresponds to the lowest safety factor among all the linking points. Always model the system con guration with the Soundvision software and check the Mechanical Data section to identify the weakest link and its corresponding working load. By default, a stress warning will appear when the mechanical safety goes beyond the recommended safety level.
Safety of ground-stacked arrays in Soundvision
For ground-stacked arrays, a distinct stability warning is implemented in Soundvision. It indicates a tipping hazard when the array is not secured to the ground, stage or platform. It is the user's responsibility to secure the array and to ignore the warning.
Additional safety for own arrays
When ying an array, use available holes to implement a secondary safety.
Considerations must be given to unusual conditions
Soundvision calculations are based on usual environmental conditions. A higher safety factor is recommended with factors such as extreme high or low temperatures, strong wind, prolonged exposition to salt water, etc. Always consult a rigging specialist to adopt safety practices adapted to such a situation.
Kara owner's manual (EN) version 1.0 |
27 |
Loudspeaker con gurations
Loudspeaker con gurations
Line source
Deployed as a standalone line source, a Kara system operates over the nominal bandwidth of the Kara enclosure. The [KARA] preset delivers a reference frequency response in long throw applications.
The Kara enclosure is driven by the LA4X / LA8 / LA12X ampli ed controllers.
Enclosure |
Kara |
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Preset |
[KARA] |
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Frequency range (-10 dB) |
55 Hz - 20 kHz |
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28 |
Kara owner's manual (EN) version 1.0 |
Loudspeaker con gurations
Line source with low-frequency element
In this con guration, a Kara line source deployed with SB18, KS21, SB28 or KS28 subwoofers, the system bandwidth is extended in the low-end.
The [KARA] preset delivers a reference frequency response in long throw applications.
The [xxxx_60] or [xxxx_100] presets provide the subwoofers with an upper frequency limit at 60 Hz in separated con guration, or 100 Hz in closely coupled con guration, for an optimal frequency coupling with the Kara line source.
Ampli ed controllers compatibility
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LA4X |
LA8 |
LA12X |
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Kara |
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SB18 |
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KS21 |
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SB28 |
— |
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KS28 |
— |
— |
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Kara line source with coupled SB18, KS21, SB28, or KS28
3 Kara : 1 subwoofer |
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Flown Kara array beside |
Flown or ground-stacked |
flown SB18/KS21 array |
Kara/SB18 array |
KARA array |
KARA array |
stacked on SB28 |
stacked on KS28 |
Maximum number of enclosures in mixed lines: 9 Kara + 3 SB18, SB28, or KS28
Maximum distance between arrays: 0.95 m / 37.4 in
Kara owner's manual (EN) version 1.0 |
29 |
Loudspeaker con gurations
Enclosure |
Kara |
SB18, KS21, SB28 or KS28 |
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Preset |
[KARA] |
[xxxx_100] |
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32 |
Hz - 20 kHz with SB18 |
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Frequency range (-10 dB) |
31 |
Hz - 20 kHz with KS21 |
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25 |
Hz - 20 kHz with SB28 or KS28 |
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Use [xxxx_xx_C] or [xxxx_xx_Cx] on a reversed subwoofer in a cardioid con guration
The cardioid con guration consists in reversing 1 element in an array of 4 subwoofers.
Refer to the subwoofer owner's manual and to the Cardioid con gurations technical bulletin.
Delay values
Do not forget to add the pre-alignment and geometric delays depending on the con guration.
Pre-alignment delays
presets |
pre-alignment delay values and polarity settings |
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[KARA] + [SB18_100] |
Kara = 0 ms |
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SB18 = 0 ms |
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[KARA] + [SB18_100_C] |
Kara = 5.5 ms |
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SB18 = 0 ms |
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[KARA] + [SB18_100_Cx] |
Kara = 4 ms |
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SB18 = 0 ms |
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[KARA] + [KS21_100] |
Kara = 0 ms |
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KS21 = 0.5 ms |
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[KARA] + [KS21_100_C] |
Kara = 5 ms |
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KS21 = 0 ms |
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[KARA] + [KS21_100_Cx] |
Kara = 4 ms |
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KS21 = 0 ms |
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[KARA] + [SB28_100] |
Kara = 0 ms |
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SB28 = 1 ms |
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[KARA] + [SB28_100_C] |
Kara = 4.5 ms |
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SB28 = 0 ms |
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[KARA] + [SB28_100_Cx] |
Kara = 7.5 ms |
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SB28 = 0 ms |
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[KARA] + [KS28_100] |
Kara = 0 ms |
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KS28 = 1 ms |
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[KARA] + [KS28_100_C] |
Kara = 4.5 ms |
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KS28 = 0 ms |
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[KARA] + [KS28_100_Cx] |
Kara = 7.5 ms |
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KS28 = 0 ms |
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30 |
Kara owner's manual (EN) version 1.0 |
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