L-Acoustics LA-RAK, Руководство пользователя

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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