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ARCSII_UM_EN_3.0

 

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ARCS II 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 system components are as follows: 

 

ARCS

®

II, full-range element, operating from 50 Hz to 20 kHz; 

 

SB28, low-frequency element, operating down to 25 Hz; 

 

LA-RAK, touring rack fitted with three LA8 amplified controllers; 

 

LA4X amplified controller 

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 fitted with three LA8 amplified 

controllers is the heart of the system. Thanks to dedicated factory presets, it constitutes an extremely advanced and 
precise  drive  system  for  the  enclosures.  In  high-end  installation  projects,  the  LA4X  amplified  controller  can  deliver 

maximum power headroom and the best possible performances. All L-ACOUSTICS amplified controllers feature the L-

DRIVE, a thermal and over-excursion protection circuit.  

Up to 253 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. 

Содержание ARCS II

Страница 1: ...ARCS II user manual EN ...

Страница 2: ...o u s t i c s c o m 2 Document reference ARCS II_UM_EN_3 0 Distribution date April 11 2017 2017 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 ...

Страница 3: ...ider wearing earplugs 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 with prolonged exposure to sound 8 h at 90 dB A 30 min at 110 dB A less than 4 min at 130 dB A SYMBOLS The following symbols are used in this document DANGER...

Страница 4: ...ce Please check the L ACOUSTICS web site on a regular basis to download the latest document and software updates www l acoustics com CONTENTS 1 ARCS II SYSTEM 5 2 SYSTEM COMPONENTS 6 2 1 Loudspeaker enclosures 6 2 2 Powering and driving system 6 2 3 Loudspeaker cables 6 2 4 Rigging elements 6 2 5 Software applications 6 3 LOUDSPEAKER CONFIGURATIONS 8 3 1 Line source 8 3 2 Line source with low freq...

Страница 5: ...metric 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 theatri...

Страница 6: ...ective lengths of 0 7 m 2 3 ft 10 m 32 8 ft and 25 m 82 ft DOFILL LA8 Breakout cable for two 2 way active enclosures PA COM 2 x 4 point SpeakON 4 mm section DO3WFILL Breakout cable for one 2 way active enclosure and two passive enclosures PA COM 3 x SpeakON 1 x 4 point and 2 x 2 point 4 mm section DOSUB LA8 Breakout cable for four passive enclosures 8 point PA COM to 4 2 point SpeakON 4 mm section...

Страница 7: ... c o u s t i c s c o m 7 ARCS II SB28 LA RAK LA8 LA4X DO3WFILL DOSUB LA8 DO 7 DO10 DO25 DOFILL LA8 SPY1 SP7 SP5 SP10 SP25 Soundvision LA Network Manager ARCS II system components excluding rigging elements and modulation cables ...

Страница 8: ...nclosure The ARCS II preset allows for a reference frequency response in medium throw applications The ARCS II enclosure can be driven by the LA4X or LA8 amplified controller Standalone ARCS II line source Horizontal array 40 up 20 down Flown horizontal array 40 down 20 up Flown vertical array 40 right 20 left Enclosure PRESET ARCS II ARCS II Frequency range 10 dB Directivity pattern 50 Hz 20 kHz ...

Страница 9: ...mplified controller ARCS II line source SB28 Horizontal array 40 up 20 down stacked on SB28 Flown horizontal array 40 down 20 up with ground stacked SB28 Flown vertical array 40 right 20 left with ground stacked SB28 Enclosure PRESET Recommended ratios ARCS II ARCS II 1 SB28 2 ARCS II or 2 SB28 3 ARCS II SB28 SB28_60 Frequency range 10 dB Directivity pattern 25 Hz 20 kHz Asymmetrical 40 20 40 towa...

Страница 10: ... for L ACOUSTICS 2 way active enclosures SpeakON points 1 1 2 2 Transducer connectors LF LF HF HF The ARCS II is bi amplified by the L ACOUSTICS LA4X or LA8 amplified controllers SB28 The SB28 is equipped with one 4 point SpeakON connector Internal pinout for L ACOUSTICS SB28 enclosures SpeakON points 1 1 2 2 Transducer connectors LF LF Not used Not used ...

Страница 11: ...Connecting ARCS II to LA4X Maximum of 2 enclosures per LA4X 1 ARCS II can be connected to each pair of output channels on the LA4X 1 2 and 3 4 Impedance load 8 Ω Connect one SP cable SP 7 SP5 SP10 or SP25 to the OUT1 OUT2 and OUT3 OUT4 connectors of the LA4X ...

Страница 12: ... be connected to each pair of output channels on the LA8 1 2 and 3 4 Impedance load 1 enclosure 8 Ω 2 enclosures 4 Ω Option A Connect a DO cable DO 7 DO10 or DO25 to the LA8 PA COM connector Use a DOFILL LA8 to split the signal into two channel pairs each one feeding one enclosure Use SP cables to connect additional similar enclosures in parallel with the first ones ...

Страница 13: ...w l a c o u s t i c s c o m 13 Option B Use an SP cable SP5 SP10 or SP25 to connect one enclosure to each of the LA8 SpeakON connectors Use SP cables to connect additional similar enclosures in parallel with the first ones ...

Страница 14: ...O 7 DO10 or DO25 to the LA8 PA COM connector Use a DO3WFILL to split the signal into one channel pair 2WAY and two single channels SUB1 and SUB2 Connect the 2WAY connector to the IN connector of the active enclosure Connect the SUB1 and SUB2 connectors to the IN connector of the subwoofers Use SP cables to connect additional ARCS II in parallel with the first ones ...

Страница 15: ...n be connected to each output channel on the LA8 CARDIOID configuration with SB28 Connect the reversed subwoofer to OUT 1 Impedance load 1 enclosure 4 Ω Option A Connect a DO DO 7 DO10 or DO25 cable to the LA8 PA COM connector Use the DOSUB LA8 to split the audio signals into four channels each one feeding one subwoofer ...

Страница 16: ...N_3 0 w w w l a c o u s t i c s c o m 16 Option B Connect an SP cable SP 7 SP5 SP10 or SP25 to each of the SpeakON connectors of the LA8 Use an SP Y1 cable and a CC4FP adapter to split the audio signals into two channels each one feeding one subwoofer ...

Страница 17: ...ing with the ARCS II line source Loudspeaker elements Amplifier outputs Channels Default parameters Routing Gain Delay Polarity Mute SB28 OUT 1 SB IN A 0 dB 0 ms ON SB28 OUT 2 SB IN A 0 dB 0 ms ON SB28 OUT 3 SB IN B 0 dB 0 ms ON SB28 OUT 4 SB IN B 0 dB 0 ms ON SB28_60_C The SB28_60_C preset provides the SB28 enclosures with an upper frequency limit at 60 Hz for an optimal frequency coupling with t...

Страница 18: ...es of gauge offering low resistance per unit length and keep the cables as short as possible The following table provides the recommended maximum length depending on the cable cross section and on the impedance load connected to the amplifier Recommended maximum length Cable cross section 8 Ω load 4 Ω load 2 7 Ω load mm2 SWG AWG m ft m ft m ft 2 5 15 13 30 100 15 50 10 33 4 13 11 50 160 25 80 17 5...

Страница 19: ...ression driver DOSC waveguide Nominal impedance LF 8 Ω HF 8 Ω RMS power handling LF 600 W HF 100 W Connectors IN 1 4 point SpeakON LINK 1 4 point SpeakON Rigging components Captive coupling bars Dimensions Physical data Weight net 50 kg 110 lb Cabinet Baltic birch plywood Finish Dark Grey brown Pantone 426C Pure white RAL 9010 Front Steel grill with anti corrosion coating Airnet fabric Protection ...

Страница 20: ...iation bass reflex Nominal impedance 4 Ω Connectors IN 1 4 point SpeakON Rigging components Integrated rigging system Handles integrated in the cabinet Dimensions Physical data Weight net 93 kg 205 lb Cabinet Baltic birch plywood Finish Dark Grey brown Pantone 426C Pure white RAL 9010 Front Steel grill with anti corrosion coating Airnet acoustically neutral fabric Rigging components Aluminium 1 Pe...

Страница 21: ...fo l acoustics com www l acoustics com L Acoustics GmbH Steiermärker Str 3 5 70469 Stuttgart Germany 49 7 11 89660 323 L Acoustics Ltd PO Box Adler Shine Aston House Cornwall Avenue London N3 1LF United Kingdom 44 7224 11 234 L Acoustics Inc 2645 Townsgate Road Suite 600 Westlake Village CA 91361 USA 1 805 604 0577 ...

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