L-Acoustics ARCS WIDE Manuel utilisateur

ARCS

ARCSARCS

ARCS

WIDE SYSTEM

WIDE SYSTEMWIDE SYSTEM

WIDE SYSTEM

ARCS

ARCSARCS

ARCS

FOCUS SYSTEM

FOCUS SYSTEMFOCUS SYSTEM

FOCUS SYSTEM

USER

USERUSER

USER

MANUAL

MANUALMANUAL

MANUAL

VERSION 1

VERSION 1VERSION 1

VERSION 1.

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ARCS

ARCSARCS

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WIDE WIDE

WIDE SYSTEM /

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FOCUSFOCUS

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SAFETY INSTRUCTIONS

SAFETY INSTRUCTIONSSAFETY INSTRUCTIONS

SAFETY INSTRUCTIONS

1. Read this manual

2. Heed all SAFETY INSTRUCTIONS as well as DANGER and O LIGATION warnings

3. Never incorporate equipment or accessories not approved by L-ACOUSTICS

4. Read all the related PRODUCT INFORMATION documents before exploiting the system

The product information document is included in the shipping carton of the related system component.

5. Read the RIGGING MANUAL before installing the product

Use the rigging elements described in the rigging manual and follow the associated procedures.

6. eware of sound levels

Do not stay within close proximity of loudspeakers in operation and consider wearing earplugs.

Loudspeaker systems are capable of producing very high sound pressure levels (S L) 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

SYMBOLSSYMBOLS

SYMBOLS

The following symbols are used in this document:

DANGER

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.

O LIGATION

This symbol notifies the user about instructions that must be strictly followed to ensure proper installation or

operation of the product.

INFORMATION

This symbol notifies the user about complementary information or optional instructions.

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WELCOME TO

WELCOME TOWELCOME TO

WELCOME TO

L-

-ACOUSTICS

ACOUSTICSACOUSTICS

ACOUSTICS

Thank you for choosing the L-ACOUSTICS

ARCS

WIDE / FOCUS 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.

lease check the L-ACOUSTICS

web site on a regular basis to download latest updates for documents and software:

www.l-acoustics.com.

CONTENTS

CONTENTSCONTENTS

CONTENTS

ARCS

WIDE SYSTEM / ARCS

FOCUS SYSTEM 4

SYSTEM COMPONENTS 5

2.1

Loudspeaker enclosures .......................................................................................................................................... 5

2.2

owering and driving system ................................................................................................................................... 5

2.3

Loudspeaker cables ................................................................................................................................................. 5

2.4

Rigging elements ...................................................................................................................................................... 5

2.5

Software applications ............................................................................................................................................... 5

OPERATING MODES 7

3.1

FULL-RANGE mode................................................................................................................................................ 7

3.2

LOW-EXTENSION mode ....................................................................................................................................... 7

LOUDSPEAKER CONNECTION 8

4.1

Connectors .............................................................................................................................................................. 8

4.2

Connection to LA8 .................................................................................................................................................. 8

4.3

Connection to LA4 .................................................................................................................................................. 9

APPENDIX A: PRESET DESCRIPTION 10

[ARCS_WIFO]: full range .................................................................................................................................................. 10

[ARCS_WIFO FI]: full range .............................................................................................................................................. 10

[SB18_60]: standard .......................................................................................................................................................... 10

[SB18_60_C]: cardioid ...................................................................................................................................................... 10

APPENDIX : RECOMMANDATIONS FOR SPEAKER CA LES 11

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1ARCS

ARCSARCS

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WIDE

WIDEWIDE

WIDE

SYSTEM /

SYSTEM /SYSTEM /

SYSTEM /

ARCS

ARCSARCS

ARCS

FOCUS

FOCUSFOCUS

FOCUS

SYSTEM

SYSTEMSYSTEM

SYSTEM

The ARCS

WIDE and ARCS

FOCUS systems are based on two constant curvature enclosures ensuring distinct

directivity pattern and S L capabilities. Intended for medium-throw applications in rental productions and fixed

installations, these line sources deliver remarkable acoustic properties and unmatched versatility for applications

including FOH L/R systems, central clusters, side-fill monitors, distributed systems and complementary fills.

The main systems components consist of the following:

• ARCS

WIDE (H x V: 30° x 90°) element, wide coverage, operating from 55 Hz to 20 kHz;

• ARCS

FOCUS (H x V: 15° x 90°) element, focused energy, operating from 55 Hz to 20 kHz;

• SB18m low frequency extension, operating down to 32 Hz;

• LA4 or LA8 amplified controllers.

The ARCS

WIDE or ARCS

FOCUS line sources provide high S L with perfect acoustic coupling, a solid LF

performance and constant tonal balance over distance. Both systems can be deployed either as a horizontal array or as

a vertical array.

In the coupling plane, the ARCS

WIDE and ARCS

FOCUS yield a razor-sharp directivity pattern, particularly valuable

to sector audience fields while avoiding reflective surfaces. In the other plane, both systems provide a 90° smooth

symmetric directivity pattern.

The ARCS

WIDE is suited to achieve an extensive coverage with few elements, offering a remarkably compact array

preserving sightlines. The total coverage angle of an ARCS

WIDE line source is proportional to the number N of

enclosures in the array, i.e. N x 30°.

The ARCS

FOCUS line source focuses the same acoustic energy within half of the coverage angle, i.e. N x 15°. The

ARCS

FOCUS is therefore suited to achieve a narrower coverage, offering a higher S L with a more extended throw

than its sibling.

The ARCS

WIDE and ARCS

FOCUS can also be deployed in “WIFO” hybrid arrays for complex audience

geometries. The dual directivity pattern and the various system configurations offered to the sound designer and system

engineer allow a high level of creative freedom. Before installation, all these configurations can be acoustically and

mechanically modeled with the SOUNDVISION 3D simulation software.

The amplified controllers offer an advanced and precise drive system for the ARCS

WIDE and ARCS

FOCUS

enclosures. Both e can be driven with the same preset. 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.

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SYSTEM

SYSTEMSYSTEM

SYSTEM

COMPONENTS

COMPONENTSCOMPONENTS

COMPONENTS

The system approach developed by L-ACOUSTICS

consists in offering a global solution that guarantee the highest and

most predictable level of performance at any step of loudspeaker system deployment: modeling, installation and

operation. A complete L-ACOUSTICS

system includes enclosures, amplified controllers, cables, rigging system and

software applications.

The main components of an ARCS

WIDE SYSTEM or ARCS

FOCUS SYSTEM are the following:

2.1 Loudspeaker enclosures

ARCS

WIDE Full-range (55Hz – 20kHz), 2-way passive, constant curvature WST

line source, 90° x 30°

ARCS

FOCUS Full-range (55Hz – 20kHz), 2-way passive, constant curvature WST

line source, 90° x 15°

SB18m High power subwoofer (down to 32Hz)

Loudspeaker system design

Sound design aspects are beyond the scope of this document. However, the various applications of the

system will be based on the operating modes presented in this document.

2.2 Powering and driving system

LA4 or LA8 Amplified controllers with DS library and networking capabilities

LA-RAK Touring rack containing three LA8, for power, audio signals and network distribution

Operating instructions

Refer to the LA4, LA8 and the LA-RAK user manual.

2.3 Loudspeaker cables

DOSUB-LA8 Breakout cable, 1 x 8-point A-COM

> 4 x 2-point SpeakON

DO cables (DO.7, DO10, DO25) 8-point A-COM

loudspeaker cables of respective lengths of 0.7 m/2.3 ft,

10 m/32.8 ft, and 25 m/82 ft

S cables (S .7, S 5, S 10, S 25) 4-point SpeakON

loudspeaker cables of respective lengths of 0.7 m/2.3 ft,

5 m/16.4 ft, 10 m/32.8 ft and 25 m/82 ft

S -Y1 Breakout cable for two passive enclosure

SpeakON

< 2 x SpeakON

Information about the connection of the enclosures to the amplifiers is given in this document.

Refer to the LA4, LA8 or LA-RAK user manual for detailed instructions about the whole cabling scheme,

including modulation cables and network.

2.4 Rigging elements

Rigging elements or procedures are not presented in this document.

Refer to the ARCS

WIDE/FOCUS SYSTEM rigging manual.

2.5 Software applications

SOUNDVISION 3D acoustical and mechanical modeling

LA NETWORK MANAGER Remote control and monitoring of amplified controllers

Using L

ACOUSTICS

software

Refer to the SOUNDVISION training and the LA NETWORK MANAGER tutorial.

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ARCS

WIDE SYSTEM / ARCS

FOCUS SYSTEM components (excluding rigging elements & modulation cables)

LA4

DOSU

LA8

LA Network Manager

Soundvision

SP5

SP25

SP.7

DO.7

DO10

DO25

RAK

S 18m

ARCS

FOCUS

ARCS

WIDE

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3OPERATING MODES

OPERATING MODESOPERATING MODES

OPERATING MODES

3.1 FULL-RANGE mode

In FULL-RANGE mode, the ARCS

WIDE/FOCUS SYSTEM operates within the nominal bandwidth of the enclosure.

It corresponds to the use of ARCS

WIDE/FOCUS enclosure(s) in standalone configuration, i.e. without complementary

subwoofers.

The ARCS

WIDE/FOCUS enclosure is driven by the LA4 or the LA8 amplified controller with a choice of two presets.

Single ARCS

WIDE / ARCS

FOCUS

Standalone ARCS

WIDE / ARCS

FOCUS line source

Horizontal

Vertical

Enclosure

[ RESET]

WIDE/FOCUS



[

ARCS_

WIFO

]

Enclosure

[ RESET]

WIDE/FOCUS



[

ARCS_

WIFO_FI

]

Frequency range (-10dB)

55Hz – 20kHz

Frequency range (-10dB)

55Hz – 20kHz

3.2 LOW-EXTENSION mode

In LOW-EXTENSION mode, the bandwidth of the ARCS

WIDE/FOCUS SYSTEM is extended in the low end.

It corresponds to the use of ARCS

WIDE/FOCUS enclosure(s) in combination with the SB18m subwoofer.

Each enclosure type is driven by the LA4 or LA8 amplified controller with dedicated factory presets. The ARCS

WIDE/FOCUS enclosure is driven with the same presets as in the standalone configuration. The SB18m subwoofer is

driven with a preset featuring an upper frequency limit at 60 Hz, for an optimal acoustic coupling with the line source.

Single enclosure + S 18m

Line source + S 18m

Flown horizontal

with ground-

stacked SB18m

Mixed

array

Recommended ratio

1 WIDE/FOCUS : 1 SB18m

Frequency range (-10dB)

32Hz – 20kHz

Enclosure

WIDE/FOCUS

SB18m

[ RESET]

 [ARCS_WIFO_FI]

 [S 18_60]

Enclosure

WIDE/FOCUS

SB18m

[ RESET]

 [ARCS_WIFO]

 [S 18_60]

Delay settings

When combining a line source with subwoofers, delays may have to be added to the presets. Refer to the

LA8 PRESET LI RARY user manual to obtain the pre-alignment delay values.

Use

[

_C]

with a

array

ardioid

configuration

The cardioid configuration consists in reversing 1 element in an array of 4 subwoofers.

Refer to the SB18 user manual for details about the CARDIOID mode.

Recommended ratio

1 WIDE/FOCUS : 1 SB18m

Frequency range (-10dB)

32Hz – 20kHz

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4LOUDSPEAKER CONNECTION

LOUDSPEAKER CONNECTIONLOUDSPEAKER CONNECTION

LOUDSPEAKER CONNECTION

4.1 Connectors

The ARCS

WIDE and the ARCS

FOCUS are 2-way passive enclosures. The

SB18m is a subwoofer enclosure. All of them are equipped with two 4-point

SpeakON

connectors wired in parallel.

The IN connector allows receiving the audio signals, whereas the LINK

connector allows routing them to another similar enclosure in parallel.

Only use the LINK connector with the LA8 amplified controller.

Internal pinout for ARCS

WIDE, ARCS

FOCUS and S 18m

SpeakON

points

Transducer

connectors

+ - Not used

Not used

ARCS

WIDE / ARCS

FOCUS

The ARCS

WIDE/FOCUS and the SB18m can be amplified by the LA4 or the

LA8 amplified controller.

4.2 Connection to LA8

To cable the ARCS

WIDE/FOCUS or the SB18m with the LA8, two options are available:

Option A:

Connect a DO cable (DO.7, DO10 or DO25) to the A-COM

connector of the LA8 and use the DOSU -LA8 to

split the audio signals into four channels, each one feeding one similar enclosure. With various enclosure types, for

example 2 ARCS WIDE FOCUS and 2 SB18m, this cabling scheme needs a dedicated custom preset.

Option B:

Connect an SP cable (S .7, S 5, S 10 or S 25) to one of the SpeakON

connectors of the LA8, and use the SP-Y1

cable to split the audio signals into two channels, each one feeding one enclosure. The CC4FP adaptor allows

interfacing the SP and SP-Y1 cables. Apply the same cabling scheme with the other LA8 SpeakON

connector.

One additional similar enclosure can be connected in parallel with each of the first ones, by using SP cables.

COM

standard

Using cable other than specified in this document to connect a subwoofer via the A-COM

connector of the

LA8 may affect the acoustic results. Refer to the LA8 PACOM CA LES technical bulletin.

Maximum of

8 enclosures p

er LA8

2 ARCS

WIDE/FOCUS or 2 SB18m can be connected in parallel to each output channel on the LA8.

Therefore, a single LA8 amplified controller can drive up to 8 enclosures (ARCS

WIDE/FOCUS or SB18m).

Impedance load

8 Ω for 1 enclosure, 4 Ω for 2 enclosures in parallel (ARCS

WIDE/FOCUS or SB18m).

Subwoofer array in CARDIOID configuration

The reversed sub must be connected to OUT 1.

LINK

IN LINK

S 18m

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Connecting 8 enclosures (ARCS

WIDE, ARCS

FOCUS or SB18m) to one LA8 with the DOSU -LA8

4.3 Connection to LA4

To cable the ARCS

WIDE/FOCUS or the SB18m with the LA4 amplified controller, two options are available:

Option A:

Connect an SP cable (S .7, S 5, S 10 or S 25) to the OUT1connector of the LA4, and use the SP-Y1 cable to split

the audio signals into two channels, each one feeding one enclosure. The CC4FP adaptor allows interfacing the SP and

SP-Y1 cables. Apply the same cabling scheme with the OUT3 connector to connect two more enclosures.

Option B:

 Use an SP cable (S .7, S 5, S 10 or S 25) to connect one similar enclosure to each of the four LA4 output channels.

Maximum of 4 enclosures per LA4

1 ARCS

WIDE/FOCUS or 1 SB18m can be connected to each output channel on the LA4.

Therefore, a single LA4 amplified controller can drive up to 4 SB18m subwoofers.

Impedance load

8 Ω for 1 enclosure (ARCS

WIDE/FOCUS or SB18m).

Subwoofer array in CARDIOID configuration

The reversed sub must be connected to OUT 1.

Connecting 4 enclosures (ARCS

WIDE, ARCS

FOCUS or SB18m) to one LA4

(Option A)

(

Option B

)

DO.7, DO10

or DO25

DOSU

LA8

S K 1

S K 2

S K 3

S K 4

Corresponding DOSUB-LA8 SpeakON

to LA8 output channels:

S K 1 = OUT 1

;

S K 2 = OUT 2

;

S K 3 = OUT 3

;

S K 4 = OUT 4

(

Option B

)

(

Option A

)

ARCS

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1010

APPENDIX

APPENDIX APPENDIX

APPENDIX A

: :

: PRESET DESCRIPTION

The latest version of each

PRESET

LI RARY

and the corresponding

user manual

are downloadable from

the L-ACOUSTICS

web site.

[ARCS_WIFO]: full range

To use ARCS

WIDE/FOCUS enclosures in FULL-RANGE mode, as a line source in standalone configuration, or in LOW-

EXTENSION mode, as a line source in combination with SB18m subwoofers.

Inputs/Outputs Elements

to connect Routing * Accessible (O) and blocked (X) parameters

Mute Gain Delay olarity

IN A Input Signal A IN_A X O O O

IN B Input Signal B IN_B X O O O

OUT 1 ARCS

WIDE/FOCUS

A_A O O O O

OUT 2 ARCS

WIDE/FOCUS

A_A O O O O

OUT 3 ARCS

WIDE/FOCUS

A_B O O O O

OUT 4 ARCS

WIDE/FOCUS

A_B O O O O

* IN: input signal. A, B: channel A, B. A: passive enclosure.

[ARCS_WIFO_FI]: full range fill

To use ARCS

WIDE/FOCUS enclosures in FULL-RANGE mode, as single elements in standalone configuration, or in

LOW-EXTENSION mode, as single elements in combination with SB18m subwoofers.

Inputs/Outputs Elements

to connect Routing * Accessible (O) and blocked (X) parameters

Mute Gain Delay olarity

IN A Input Signal A IN_A X O O O

IN B Input Signal B IN_B X O O O

OUT 1 ARCS

WIDE/FOCUS

A_A O O O O

OUT 2 ARCS

WIDE/FOCUS

A_A O O O O

OUT 3 ARCS

WIDE/FOCUS

A_B O O O O

OUT 4 ARCS

WIDE/FOCUS

A_B O O O O

* IN: input signal. A, B: channel A, B. A: passive enclosure.

[S 18_60]: standard

To use SB18m subwoofers in STANDARD mode, as a single elements or within an array in standard configuration.

Inputs/Outputs Elements to connect Routing* Accessible (O) and locked (X) parameters

Mute Gain Delay olarity

IN A Input signal A IN_A X O O O

IN B Input signal B IN_B X O O O

OUT 1 Subwoofer SB_A O O O O

OUT 2 Subwoofer

SB_A O O O O

OUT 3 Subwoofer

SB_B O O O O

OUT 4 Subwoofer

SB_B O O O O

* IN: input signal. A, B: channel A, B. SB: subwoofer.

[S 18_60_C]: cardioid

To use SB18m subwoofers in CARDIOID mode, as an array in cardioid configuration.

Inputs/Outputs Elements to connect Routing* Accessible (O) and blocked (X) parameters

Mute Gain Delay olarity

IN A Input signal A IN_A X O O O

IN B Input signal B IN_B X O O O

OUT 1 Reversed subwoofer SR_A O X X X

OUT 2 Subwoofer SB_A O X X X

OUT 3 Subwoofer

SB_A O X X X

OUT 4 Subwoofer

SB_A O X X X

* IN: input signal. A, B: channel A, B. SB: subwoofer. SR: reversed subwoofer.

Autres manuels pour ARCS WIDE

Ce manuel convient aux modèles suivants

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