L-Acoustics K2 - Introduction and System Components; K2 WST Line Source Overview

Introduction
Introduction
K2 variable curvature WST line source
The K2 is the full range element of a WST
®
line source with variable curvature and adjustable horizontal directivity.
The K2 loudspeaker enclosure is based on a 3-way active design. It comprises 4 input sections: 2 LF and 1 MF at a
nominal impedance of 8 ohms, and 1 HF at a nominal impedance of 16 ohms. It features two 12" speakers and four
6.5", all direct-radiating neodymium speakers mounted in a bass-reex enclosure, and two 3" neodymium diaphragm
compression drivers coupled to individual DOSC
®
waveguides and adjustable directivity ns. The transducers are
implemented in a K-shape conguration. The cabinet is made of machined rst grade Baltic birch plywood (for top,
bottom and back panels) combined to die cast aluminum side panels to ensure maximum acoustical and mechanical
integrity while reducing weight to the minimum. A four-point rigging system is integrated into the cabinet.
The K2 enclosure operates over the nominal frequency range of 35 Hz to 20 kHz. Its LF contour can be reinforced with
the dedicated K1-SB extension and its bandwidth can be extended down to 25 Hz with the KS28 and SB28 subwoofers.
In the horizontal plane, the directivity is adjustable down to 300 Hz, with two symmetric settings (70° or 110°) and two
asymmetric settings (90° as 35°/55° or 55°/35°).
The K2 rigging system allows vertical assembly of enclosures with various inter-element angles (up to 10°), constituting
a line array with variable curvature. The combination of the coplanar symmetry and the DOSC
®
waveguide in the HF
region ensure a perfect acoustic coupling between the elements of an array. The WST
®
(Wavefront Sculpture Technology)
criteria are fullled, so that such an array can be qualied as a true line source. Any WST
®
line source provides a smooth
tonal response and a coverage that is free of secondary lobes over the entire frequency range.
The K2 is driven and quad-amplied by the LA12X, LA8 or LA4X controller with factory presets which ensure
linearization, protection, and optimization for the loudspeaker system.
How to use this manual
The K2 owner's manual is intended for all actors involved in the system design, implementation, preventive and corrective
maintenance of the K2 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.13)
• Rigging system description (p.19)
2. Prepare the system conguration. Consider the mechanical limits and the available acoustical congurations.
• Mechanical safety (p.28)
• Loudspeaker congurations (p.31)
3. Before rigging the system, perform mandatory inspections and functional checks.
• Inspection and preventive maintenance (p.42)
4. To deploy the system, follow the step-by-step rigging instructions and refer to the cabling schemes.
• Rigging procedures (p.61)
• Connection to LA amplied controllers (p.127)
The Corrective maintenance (p.129) 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 K2 owner's manual (EN) version 1.1