L-ACOUSTICS ARCS II [3/12] Arcs arcs arcs arc
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L-ACOUSTICS ARCS II [3/12] Arcs arcs arcs arc

L-ACOUSTICS ARCS II [3/12] Arcs arcs arcs arc
ARCSII_UM_E N_1-2
w w w . l - a c o u s t i c s . c o m
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WELCOME TO
WELCOME TOWELCOME TO
WELCOME TO
L
LL
L-
--
-ACOUSTICS
ACOUSTICSACOUSTICS
ACOUSTICS
®
Thank you for choosing the L-ACOUSTICS
®
ARCS
®
II SYSTEM.
This document contains essential information on using the system properly. Carefully read this document in order to
become familiar with the system.
As part of a continuous evolution of techniques and standards, L-ACOUSTICS
®
reserves the right to
change the specifications of its products and the content of its documents without prior notice.
Please check the L-ACOUSTICS
®
web site on a regular basis to download latest updates for documents and software:
www.l-acoustics.com.
1
11
1 ARCS
ARCSARCS
ARCS
®
II
IIII
II
SYSTEM
SYSTEMSYSTEM
SYSTEM
The ARCS
®
II (Arrayable Radial Coherent System, generation II) has benefited from a design exploiting the Wavefront
Sculpture Technology
®
in a constant curvature line source solution. Intended for the medium to large rental
productions, it delivers remarkable power, bandwidth and coherence, along with a flexible and predictable coverage.
Besides, it offers the audience an incomparable listening experience featuring clarity, precision and impact.
The main components of the system consist of the following:
• ARCS
®
II, full-range element, operating from 50 Hz to 20 kHz;
• SB28, low frequency extension, operating down to 25 Hz;
• LA-RAK, touring rack fitted with three LA8 amplified controllers.
The ARCS
®
II enclosure offers a number of improvements over the previous generation, the major of them being the K1
grade transducers for more resources and lower weight. It also features a new front grill for enhanced durability and
cosmetics, and is driven by a single factory preset to accommodate any applications efficiently.
An ARCS
®
II line source can be deployed either horizontally or vertically, with a coverage angle that is proportional to
the number of enclosures in the array (N x 22.5°). On the other plane, vertical or horizontal respectively, the ARCS
®
II
line source provides an asymmetrical coverage angle of 60° (20°/40°). The orientation of the ARCS
®
II enclosures within
the array determines the asymmetric distribution, allowing the use of a horizontal ARCS
®
II line source either for
upward or downward coverage.
The ARCS
®
II can be quickly deployed as a tightly-packed front of house system for medium throw applications with
high SPL, LF impact and excellent stereo imaging. Thanks to its precise and flexible coverage capability, other
applications include distributed system, center cluster for theatrical work, sidefill monitoring, flown or stacked center
fill, stereo front fill, offstage fill or delay system for concert audiences in stadia and arenas. Before installation, any
system configuration can be acoustically and mechanically modeled with the SOUNDVISION 3D simulation software.
As a distribution platform for power, audio signals and network, the LA-RAK touring rack is the heart of the system. It
houses three LA8 amplified controllers. Thanks to dedicated factory presets, it constitutes an extremely advanced and
precise drive system for the enclosures of the ARCS
®
II system. All L-ACOUSTICS amplified controllers feature the L-
DRIVE, a thermal and over-excursion protection circuit.
Up to 253 LA8 amplified controllers can be connected together via the Ethernet-based L-NET protocol. The LA
NETWORK MANAGER software allows online remote control and monitoring of all the connected units, via a user-
friendly and intuitive graphic interface, and features the Array Morphing EQ. This exclusive tool allows the engineer to
quickly adjust the tonal balance of the system to reach a reference curve or to ensure consistency of the sonic signature.
Acoustic incompatibility between ARCS
®
II and ARCS
®
The ARCS
®
II features a dedicated factory preset and a new enclosure tuning, both of them optimized for the
new K1 grade drivers. Therefore, L-ACOUSTICS
®
does not recommend mixing ARCS
®
II and ARCS
®
enclosures due to the sonic differences between the two generations.

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