arcs® wide system wide system arcs® focus system
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1. input signal A B channel A B SB subwoofer SR reversed subwoofer ARCSWIFO_UM_EN_1 0 WWW L AGOUSTICS COM APPENDIX B RECOMMANDATIONS FOR SPEAKER CABLES Q Cable quality and resistance Only use high quality fully insulated speaker cables made of stranded copper wire Use cables 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 SWG AWG m t m m IS 30 10 5 50 i0 33 53 240 390 60 19 40 U1 U1 0 ARCSWIFO_UM_EN_1 0 WWW L AGOUSTICS COM Document reference ARCSWIFO_UM_EN_I 0 Distribution date September 6 2012 2012 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 WWW L ACOUSTICS COM2. or operation of the product OBLIGATION 45 This symbol notifies the user about instructions that must be strictly followed to ensure proper installation or operation of the product INFORMATION 2 This symbol notifies the user about complementary information or optional instructions ARCSWIFO_UM_EN_1 0 WWW L AGOUSTICS COM WELCOME TO L 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 Please check the L ACOUSTICS web site on a regular basis to download latest updates for documents and software www l acoustics com CONTENTS ARCS WIDE SYSTEM ARCS FOCUS SYSTEM 4 2 SYSTEM COMPONENTS 5 2 kii vivoseds siteni di isvin bekane nsii Eees Nna varios 5 2 2 Powering and driving 55 ede sneniGobedeckaeayinsuaeserebscexcahtaoentectsnredeets 5 ZS E E E T E ET TE 5 2A REOM EENEN 5 29 SOMWA APP EA E A A E E 5 3 OPERATING MODES 7 7 3 2 KOW EAXATENSON ee 7 4 LOUDSPEAKER CONNECTION 8 C 8 8 2 0 0 er 8 4 3 Connection to 000000 9 APPENDIX A PRESET DESCRIPTION 10 ARCS WIED NEE 8 lO ARGS VI
3. other LA8 SpeakON connector One additional similar enclosure can be connected in parallel with each of the first ones by using SP cables PA COM standard Using cable other than specified in this document to connect a subwoofer via the PA COM connector of the LA8 may affect the acoustic results Refer to the LA8 PACOM CABLES technical bulletin Maximum of 8 enclosures per 8 2 ARCS WIDE FOCUS or 2 SBI8m can be connected in parallel to each output channel on the LAS Therefore a single LA8 amplified controller can drive up to 8 enclosures ARCS WIDE FOCUS or SBI8m 93 Impedance load 8 Q for enclosure 4 Q for 2 enclosures in parallel ARCS WIDE FOCUS or SBI8m 0 Subwoofer array in CARDIOID configuration The reversed sub must be connected to OUT ARCSWIFO_UM_EN_1 0 WWW L AGOUSTICS COM Corresponding DOSUB LA8 SpeakON to LA8 output channels SPK OUT SPK 2 OUT 2 SPK 3 OUT 3 SPK 4 OUT 4 Option A E 0 Connecting 8 enclosures ARCS WIDE ARCS FOCUS or SBI8m to one LA8 with the DOSUB LA8 4 3 Connection to 4 To cable the ARCS
4. ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 0 WWW L ACOUSTICS COM ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 0 SAFETY INSTRUCTIONS Read this manual 2 Heed all SAFETY INSTRUCTIONS as well as DANGER and OBLIGATION 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 Beware 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 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 at 90 dB A 30 min at 0 dB A less than 4 min at 130 dB A SYMBOLS The following symbols are used in this document DANGER A 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
5. N The latest version of each PRESET LIBRARY and the corresponding user manuals 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 SB 8m subwoofers to connect i NA _ O O NB 1 5 NB x o O O input signal A B channel A B PA 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 SB 8 subwoofers Elements to connect 0 ARCS WIDE FOCUS 0 O OUT 3 ARCS WIDE FOCUS OUT 4 ARCS WIDE FOCUS IN input signal A B channel A B PA passive enclosure 5515 60 standard To use SB 8m subwoofers in STANDARD mode as a single elements or within an array in standard configuration Inputs Outputs Elements to connect Routing 0 ES IN_A OUT4 IN input signal A B channel A B SB subwoofer 5518 60 6 cardioid To use SBI8m subwoofers in CARDIOID mode as an array in cardioid configuration Inputs Outputs Elements to connect Routing AS a eI es Polarity IN_A IN
6. WIDE FOCUS or the 55 8 with the amplified controller two options are available Option A Connect an SP cable SP 7 SP5 SP10 or SP25 to the OUT connector of the and use the SP Y I cable to split the audio signals into two channels each one feeding one enclosure The CC4FP adaptor allows interfacing the SP and SP Y cables Apply the same cabling scheme with the OUT3 connector to connect two more enclosures Option B Use an SP cable SP 7 SP5 SP10 or SP25 to connect one similar enclosure to each of the four LA4 output channels Maximum of 4 enclosures per LA4 ARCS WIDE FOCUS or SB18m can be connected to each output channel on the LA4 Therefore a single amplified controller can drive up to 4 SB 8 subwoofers Impedance load 8 for enclosure ARCS WIDE FOCUS or SBI8m Subwoofer array in CARDIOID configuration The reversed sub must be connected to OUT 282 TUT 1111 Connecting 4 enclosures ARCS WIDE ARCS FOCUS or SBI8m to one 4 ARCSWIFO_UM_EN_1 0 WWW L AGOUSTICS COM ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 0 APPENDIX A PRESET DESCRIPTIO
7. WIFO_UM_EN_1 0 WWW L AGOUSTICS COM ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 0 SB 8m SP YI ARCS WIDE DOSUB LA8 5 SP25 Soundvision LA Network Manager ARCS WIDE SYSTEM ARCS FOCUS SYSTEM components excluding rigging elements amp modulation cables ARCSWIFO_UM_EN_1 0 WWW L AGOUSTICS COM 3 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 io Enclosure PRESET TO WIDE FOCUS ARCS_WIFO NSL iol Frequency range 10dB 55Hz 20kHz Frequency range 0dB Hol 55Hz 20kHz Vertical Q Enclosure PRESET L WIDE FOCUS ARCS_WIFO FI orizontal 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 dedic
8. a 111 0 EEEa g e A cnet E A E A aie en cotie Gor aunts same alee E A 0 0 10 APPENDIX B RECOMMANDATIONS FOR SPEAKER CABLES ARCSWIFO_UM_EN_1 0 WWW L AGOUSTICS COM ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 0 ARCS WIDE SYSTEM ARCGS FOCUS SYSTEM The ARCS WIDE and ARCS FOCUS systems are based on two constant curvature enclosures ensuring distinct directivity pattern and SPL 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 e ARCS WIDE H x V 30 x 90 element wide coverage operating from 55 Hz to 20 kHz e ARCS FOCUS H x V 15 x 90 element focused energy operating from 55 Hz to 20 kHz 55 low frequency extension operating down to 32 Hz LA4 or LA8 amplified controllers The ARCS WIDE or ARCS FOCUS line sources provide high SPL with perfect acoustic coupling a solid LF performance and constant tonal balance over distance Both systems can be d
9. ated factory presets The ARCS WIDE FOCUS enclosure is driven with the same presets as in the standalone configuration The 58 8 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 SBI8m Line source SBI8m Recommended ratio qd WIDE FOCUS SBI8m Recommended ratio 1 IANI 1 WIDE FOCUS SBI8m lt S 3 C Frequency range 008 Frequency range 10468 32Hz 20kHz E 32Hz 20kHz i 21 p xq 55 z i 1116 Enclosure PRESET ISSA Enclosure PRESET WIDE FOCUS gt ARCS _WIFO FI Flown horizontal WIDE FOCUS gt ARCS _WIFO with ground SBI8m gt 5818 60 stacked SBI8m 5818 5818 60 Delay settings When combining a line source with subwoofers delays may have to be added to the presets Refer to the 8 PRESET LIBRARY user manual to obtain the pre alignment delay values Use 5518 60 C with an SBI8m array in cardioid configuration The cardioid configuration consists in reversing element in an array of 4 subwoofers Refer to the 55 8 user manual for details about the CARDIOID mode ARCSWIFO_UM_EN_1 0 WWW L AGOUSTICS COM ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 0 4 LOUDSPEAKER CONNECTION 4 1 Connectors The ARCS WIDE and the ARCS FOCUS ar
10. e 2 way passive enclosures The 55 8 15 a subwoofer enclosure All of them are equipped with two 4 point ARCS WIDE FOCUS SpeakON connectors wired in parallel JBE 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 SBI8m 55 181 5268608 points I l 2 2 Transducer connectors Notused Not used 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 SBI8m with the LA8 two options are available Option A Connect a DO cable DO 7 DOIO or DO25 to the PA COM connector of the LA8 and use the DOSUB LAS8 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 SB 8 this cabling scheme needs a dedicated custom preset Option B Connect an SP cable SP 7 SP5 SP10 or SP25 to one of the SpeakON connectors of the LA8 and use the SP YI cable to split the audio signals into two channels each one feeding one enclosure The CC4FP adaptor allows interfacing the SP and SP YI cables Apply the same cabling scheme with the
11. e operating modes presented in this document 2 2 Powering and driving system LA4 or LA8 Amplified controllers with DSP 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 x 8 point PA COM gt 4 x 2 point SpeakON DO cables DO 7 DOI0 DO25 8 PA COM loudspeaker cables of respective lengths of 0 7 m 2 3 ft 10 m 32 8 ft and 25 m 82 ft SP cables SP 7 SP5 SP10 SP25 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 SP Y Breakout cable for two passive enclosure SpeakON lt 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 A 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 ARCS
12. eployed 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 SPL 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 ther
13. mal 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 ARCSWIFO_UM_EN_1 0 WWW L AGOUSTICS COM 2 SYSTEM 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 SB 8 1 High power subwoofer down to 32112 Loudspeaker system design Sound design aspects are beyond the scope of this document However the various applications of the system will be based on th
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