ARCS® FOCUS SYSTEM
Contents
1. Ka Ga 8 ES Oe 3 ee Ga Mi N G ss TT e a F m A FRONT SIDE 365 mm 14 4 in TOP Weight net 36 kg 79 Ib Cabinet Baltic birch plywood Finish Dark Grey brown Pantone 426C i Pure white RAL 90108 Physicaldata Custom RAL code on special order Front Steel grill with anti corrosion coating Airnet fabric Protection Rating IP45 Rigging components High strength steel with anti corrosion coating Peak level at m under free field conditions using 10 dB crest factor pink noise with specified preset ARCSWIFO_UM_EN_1 2 WWW L ACOUSTICS COM 21 ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 SBI8m Description Subwoofer enclosure amplified by LA4X or LA8 Low frequency limit 10 dB 32 Hz SB18 100 preset Maximum SPL 136 dB SBI8 100 preset RMS power handling 700 W Transducers x 18 weather resistant bass reflex Nominal impedance 8O Connectors IN 1 x 4 point SpeakON LINK x 4 point SpeakON Rigging components Integrated pole mount socket Captive coupling bars Handles integrated into the cabinet 759 mm 29 9 in Dimensions BOTTOM 717 mm 28 2 in de rio E d D 5 com FRONT SIDE Weight net 62 kg 137 Ib Cabinet Baltic birch plywood Finish Dark Grey b2. Sound design aspects are beyond the scope of this document However the various applications of the system will be based on the loudspeaker configurations presented in this document 1 2 Powering and driving system LA4 LA4X or LA8 Amplified controllers with DSP preset library and networking capabilities Operating instructions Refer to the LA4 LA4X LA8 or LA RAK user manuals 1 3 Loudspeaker cables DO cables DO 7 DO10 DO25 8 point PA COM loudspeaker cables 4 mm section Respective lengths of 0 7 m 2 3 ft 10 m 32 8 ft and 25 m 82 ft DOSUB LAB Breakout cable for four passive enclosures 8 point PA COM to 4 x 2 point SpeakON 4 mm section SP cables SP 7 SP5 SP10 SP25 4 point SpeakON loudspeaker cables 4 mm section 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 YI Breakout cable for two passive enclosures 4 point SpeakON to 2 x 2 point SpeakON 2 5 mm section Provided with CC4FP adapter D Information about the connection of the enclosures to the LA amplifiers is given in this document Refer to the LA4 LA4X LA8 or LA RAK user manuals for detailed instructions about the whole cabling scheme including modulation cables and network 1 4 Rigging element Rigging elements or procedures are not presented in this document Refer to the ARCS WIDE FOCUS rigging manual 1 5 Software application SOUNDVISION Proprietary acoustical and mechanical 3D
3. 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 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 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 ampli
4. ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 WWW L ACOUSTICS COM ARG s WIDE TrPEPRODUIT USER MANUAL VERSION 1 2 SAFETY INSTRUCTIONS 2 3 4 Read this manual Follow all SAFETY INSTRUCTIONS as well as DANGER and OBLIGATION warnings Never incorporate equipment or accessories not approved by L ACOUSTICS 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 Read the RIGGING MANUAL before installing the system Use the rigging accessories described in the rigging manual and follow the associated procedures 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 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 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 OBLIGATION This symbol notifies the user
5. OSUB LA8 to separate the four output channels gt If necessary use SP cables to connect additional similar enclosures in parallel with the first ones 41 se 4 i SPK 4 OUT4 GR ER TE pe SI TE a H DO cable Hi Ul SP Si En TE _ SI TE H SPK 3 OUT3 DOSUB LAB SC i SP H F SPK 2 OUT2 S 7 SA UB Ep TE f SPK I OUTI LA8 option A maximum configuration with ARCS WIDE FOCUS Fa Corresponding DOSUB LA8 SpeakON points and LA8 output channels SPKI OUT SPK3 OUT 3 SPK2 OUT 2 SPK4 OUT 4 ARGSWIFO UM EN 1 2 WWW L ACOUSTICS COM 15 ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 SPK4 OUT4 TH TE lt A U TE lt A SPK3 OUT3 Lei Eyn e 14 Al DOSUB LA8 SPK2 OUT2 r ep Et SPKI OUTI ep 5 5 KESE p E LA8 option A with ARCS WIDE FOCUS SBI8m ee Ga Ga m ii ke pg ER E DO cable DOSUB LA8 amp SPK SPK 2 SPK 4 OUTI OUT2 OUT4 LA8 option A with SBI8m ARGSWIFO UM EN 1 2 WWW L AGOUSTIGS COM 16 Option B gt Connect an SP cable SP 7 SP5 SP10 or SP25 to the OUTI OUT2 and OUT3 OUT4 LA8 SpeakON connectors gt Use a CC4FP adapter to connect an SP YI cable and separate the two output channels gt If necessary use SP cables to connect additional similar enclosures in parallel w
6. about instructions that must be strictly followed to ensure proper installation or operation of the product D INFORMATION This symbol notifies the user about complementary information or optional instructions ARGSWIFO UM EN 1 2 WWW L ACDOUSTICS COM 2 GONTENTS ARCS WIDE FOCUS SYSTEM 4 l SYSTEM COMPONENTS 5 1 1 Eotidspeaker enclosure irsinin seed 5 LZ Powering and driving Syetert 21 uudse tuka Uh kee Sue 14000 La KE Ea Saaka neurite ated 5 1 3 Lolidspeaker cables enera aia re edki DEA a E EA EE E E 5 E STEEN 5 TE 5 2 LOUDSPEAKER CONFIGURATIONS H 2 1 Line Source EE 7 Standalone ARCS WIDE FOCUS line source 0 cccccccccccccessssscccsccecsssssesececccssescessccecesssussssecessesusesscescecssessssecesssesseseseeseeseeees 7 2 2 Line source with low frequency element 8 ARCS WIDE FOCUS line source SBIBm iiiieeneneeeeeneneneneneneoenennneneneeeoenennneneeeo nene neneneeeseneneeeeeeeneneneneneneee eee 8 2 3 Line source glement sonrisa kka easier EAEI EE ASA EN 9 Single ARCS WIDE FOGUS enclo re eessen 9 2 4 Line source with low frequency element 10 Single ARCS WIDE FOCUS F SB BM s i cccecactecccesscsutcnsscetssccssscorsaszsesesestsssetestonvssstonsvccesbsusedeonsceutotvvabassduncseveatensedsetsnssestestons 10 3 LOUDSPEAKER CONNECTION II 3 1 CONMECtOMS 6s sien eee EE II 3 2 Connection to LA4 LA4X emiiiieeeennneneeeeenonnnnneneeoonannnnaenen
7. dance load 8 Q for enclosure Option A gt Use SP cables SP 7 SP5 SP10 or SP25 to connect first enclosures to the four LA4 LA4X output channels LA4 LA4X option A maximum configuration with ARCS WIDE FOCUS ARGSWIFO UM EN 1 2 www L AcOUSTICS GOM LA4 LA4X option A maximum configuration with ARCS WIDE FOCUS SBI8m LA4 LA4X option A maximum configuration with SB I 8m ARGSWIFO UM EN 1 2 WWW L ACOUSTICS COM 13 ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 Option B gt Connect an SP cable SP 7 SP5 SP10 or SP25 to the OUTI OUT2 and OUT3 OUT4 connectors of the LA4 LA4X gt Use a CC4FP adapter to connect an SP YI cable and separate the two output channels LA4 LA4X option B maximum configuration with SB 8m ARGSWIFO UM EN 1 2 www L AcoOuUSTICS GOM 3 3 Connection to LABS Maximum number of enclosures per LA8 Two ARCS WIDE FOCUS or two SBI8m can be connected in parallel to each output channel on the LA8 Therefore a single LA8 amplified controller can drive up to e 8x ARCS WIDE FOCUS or e 8x SBI8mor e 4x ARCS WIDE FOCUS and 4 x SB18m Cardioid configuration Connect the reversed subwoofer s to OUT to use the cardioid preset Fa Impedance load 8 Q for enclosure 4 Q for 2 enclosures Option A gt Connect a DO cable DO 7 DO10 or DO25 to the LA8 PA COM connector gt Use the D
8. eoenenneneeeo sean neneneeeeeneneneneeee sen neneneeenennaneneeeeeeennneneeee eee 12 Ee EE 12 Gite AA TE 14 3 3 Connection to LAB EE 15 OPLION E 15 OptionB2ssm esik MTA nina een lee Eege eet 17 APPENDIX A PRESET DESCRIPTION 19 ARCS WIFO and ARCS WIFO_FI cscssssssssssesssssssssssssssssssssssssseseussssssscsssssesssseseussssssecessssasssseseuseosssesessssasssseseaseseseevens 19 RENE 19 SB B60 2G EE 19 APPENDIX B RECOMMANDATION FOR SPEAKER CABLES 19 APPENDIX C SPECIFICATIONS 20 eer E EE 20 ARES WIDE AAEE ere ee lake ahne vaaata EEGENEN 21 EE 22 ARGSWIFO UM EN 1 2 www L AcCOUSTICS COM 3 ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 ARCS WIDE 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 e B18m low frequency extension operating down to 32 Hz s LA4 LA4X
9. fied controllers offer an advanced and precise drive system for the ARCS WIDE and ARCS FOCUS enclosures Both 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 ARGSWIFO UM EN 1 2 www L AcOUSTICS GOM 4 1 SYSTEM COMPONENTS The system approach developed by L ACOUSTICS consists in offering a global solution that guarantees 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 1 1 Loudspeaker enclosure 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 SBI8m High power subwoofer down to 32Hz D Loudspeaker system design
10. ith the first ones JH mm Wm L e J SP HL ID reel LB e NEI SPYI CC4FP mIL lt E SR CR ECH SP IL E SP i E E ke To E Be ee To D SPYI SP SP E CC4FP LA8 option B maximum configuration with ARCS WIDE FOCUS Es SS SPYI CC4FP SP IL Th TH E p SP di N U NET SPYI SP IL Th CE E SP ol 1 11 U f CC4FP LA8 option B with ARCS WIDE FOCUS SBI8m ARGSWIFO UM EN 1 2 WWW L ACOUSTICS COM 17 ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 SP SP SP Ji Al alad SPYI SPYI CC4FP CC4FP LA8 option A maximum configuration with SBI8m ARGSWIFO UM EN 1 2 www L AcOUSTICS GOM APPENDIX A PRESET DESGRIPTION ARCS WIFO and ARCS WIFO FI The ARCS WIFO preset allows for a reference frequency response in medium throw applications The ARCS WIFO FI preset allows for a reference freguency response in short throw applications Default parameters Loudspeaker elements Amplifier outputs Channels Routing Routing SB18 60 The SB18 60 preset provides the subwoofer enclosures with an upper freguency limit at 60 Hz Default parameters Loudspeaker elements Amplifier outputs Channels EU Routing SB18 60 C The SB18 60 C preset provides the subwoofer enclosures with an upper frequency limit at 60 Hz It features optimi
11. lows for a reference frequency response in medium throw applications The SBI8 60 preset provides the subwoofer enclosures with an upper freguency limit at 60 Hz for an optimal frequency coupling with the ARCS WIDE FOCUS line source This configuration is driven by the LA4 LA4X or LA8 amplified controllers ARCS WIDE FOCUS line source SBI8m mm ER a a ba 2 Flown horizontal ARCS WIDE FOCUS with stacked ground stacked SB 8m Mixed arrays Enclosure PRESET ARCS WIDE FOCUS gt ARCS_WIFO SBI8m gt SB18_60 Frequency range 10dB Recommended ratio 32 Hz 20 kHz ARCS WIDE FOCUS SBI8m ARGSWIFO UM EN 1 2 www L AcOUSTICS GOM 8 2 3 Line source element In this configuration a single ARCS WIDE FOCUS enclosure without complementary subwoofers the system operates over the nominal bandwidth of the enclosure The ARCS WIFO FI preset allows for a reference freguency response in short throw applications This configuration is driven by the LA4 LA4X or LA8 amplified controller Single ARCS WIDE FOCUS enclosure Freguency range 10 dB Enclosure PRESET 55 Hz 20 kHz ARCS WIDE FOCUS SBI8m gt ARCS WIFO FI ARGSWIFO UM EN 1 2 www L AcOUSTICS COM 9 ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 2 4 Line source with low frequency element In this configuration a single ARCS WIDE FOCUS enclosure dep
12. loyed with an SBI8m subwoofer the system bandwidth is extended in the low end The ARCS WIFO FI preset allows for a reference frequency response in short throw applications The SBI8 60 preset provides the subwoofer enclosures with an upper freguency limit at 60 Hz for an optimal frequency coupling with the ARCS WIDE FOCUS element This configuration is driven by the LA4 LA4X or LA8 amplified controllers Single ARCS WIDE FOCUS SBI8m Enclosure PRESET ARCS WIDE FOCUS gt ARCS WIFO FI SBI8m gt SBI8 60 Frequency range 10dB Recommended ratio 32 Hz 20 kHz ARCS WIDE FOCUS SBI8m ARGSWIFO UM EN 1 2 WWW L ACOUSTIGS CGCOM 10 3 LOUDSPEAKER CONNECTION 3 1 Connectors IN LINK D Internal pinout for L ACOUSTICS ARCS WIDE FOCUS and SBI8m SpeakON points I 2 2 Transducer connectors Not used Not used ARGSWIFO UM EN 1 2 WWW L ACOUSTICS COM 11 ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 3 2 Connection to LA4 LA4X Maximum number of enclosures per LA4 LA4X One ARCS WIDE FOCUS or one SBI8m can be connected to each output channel on the LA4 LA4X Therefore a single LA4 LA4X amplified controller can drive up to e 4x ARCS WIDE FOCUS or e 4x SBI8m or e 3 x ARCS WIDE FOCUS and x SB18m Cardioid configuration Connect the reversed subwoofer s to OUT to use the cardioid preset Fa Impe
13. modeling software LA NETWORK MANAGER Remote control and monitoring of amplified controllers D Using L ACOUSTICS software Refer to the SOUNDVISION user manual and the LA NETWORK MANAGER tutorial ARCSWIFO_UM_EN_1 2 www L AcoOUSTICS COM 5 ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 ARCS FOCUS SBI8m SPYI SP7 SP5 ARCS WIDE DO3WFILL DO25 DOSUB LA8 LA Network Manager Soundvision ARCS WIDE FOCUS system components excluding rigging elements and modulation cables ARGSWIFO UM EN 1 2 WWW L AGOUSTICS COM 6 2 LOUDSPEAKER CONFIGURATIONS 2 1 Line source Deployed as a standalone line source an ARCS WIDE FOCUS system operates over the nominal bandwidth of the ARCS WIDE FOCUS enclosure The ARCS_WIFO preset allows for a reference frequency response in medium throw applications This configuration is driven by the LA4 LA4X or LA8 amplified controller Standalone ARCS WIDE FOCUS line source Horizontal Vertical Frequency range 10 dB Enclosure PRESET 55 Hz 20 kHz ARCS WIDE FOCUS gt ARCS WIFO ARGSWIFO UM EN 1 2 www L AcOUSTICS COM ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 2 2 Line source with low frequency element In this configuration an ARCS WIDE FOCUS line source deployed with SB 18m subwoofers the system bandwidth is extended in the low end The ARCS WIFO preset al
14. rown Pantone 426C Pure white RAL 9010 Physical data Custom RAL code on special order Front Steel grill with anti corrosion coating Airnet acoustically neutral fabric Rigging Steel with anti corrosion coating components Peak level at m under half space conditions using 10 dB crest factor pink noise with specified preset ARGSWIFO UM EN 1 2 WWW L ACOUSTICS COM ARGSWIFO UM EN 1 2 WWwW L ACOUSTICS COM 23 Document reference ARCSWIFO UM EN 1 2 Distribution date March 31 2014 2014 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 COM
15. x 4 point SpeakOn LINK 4 point SpeakOn Rigging components Rigging rails and WIFORIG rigging bars _444 mm 15 Sin 5 See OLID E CE E wen e J Sas Dimensions FRONT SIDE 252 mm 9 9 in 4 gt 365 mm 14 4 in TOP Weight net 38 kg 84 Ib Cabinet Baltic birch plywood Finish Dark Grey brown Pantone 426C Pure white RAL 9010 Physical data Custom RAL code on special order Front Steel grill with anti corrosion coating Airnet fabric Protection Rating IP45 Rigging components High strength steel with anti corrosion coating Peak level at m under free field conditions using 10 dB crest factor pink noise with specified preset ARCSWIFO_UM_EN_1 2 WWW L ACOUSTICS COM 20 ARCS WIDE Description Usable bandwidth 10 dB 2 way passive enclosure amplified by LA4X or LA8 55 Hz 20 kHz ARCS_WIFO preset Maximum SPL 135 dB ARCS_WIFO preset Coverage angle 6 dB 30 x 90 Transducers LF x 3 diaphragm compression driver DOSC waveguide HF x 2 weather resistant bass reflex Nominal impedance 19 RMS power handling 450 W Connectors IN x 4 point SpeakOn LINK 4 point SpeakOn Rigging components Rigging rails and WIFORIG rigging bars Dimensions 444 mm 15 5 in Cenn m 5 na iS
16. zed delay settings for SB 8 arrays in cardioid configuration Default parameters Loudspeaker elements Amplifier outputs Channels Roung Routing son oala A S APPENDIX B RECOMMANDATION FOR SPEAKER GABLES D 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 Cable cross section 8 Q load 4 Q load 2 7 Q load mm SWG AWG m ft m ft m ft 2 5 15 13 30 100 15 50 10 33 4 13 II 50 160 25 80 17 53 6 II 9 74 240 37 120 25 80 10 9 7 120 390 60 195 40 130 ARCSWIFO_UM_EN_1 2 WWW L AGOUSTIGS COM 19 ARCS WIDE SYSTEM ARCS FOCUS SYSTEM USER MANUAL VERSION 1 2 APPENDIX G SPECIFICATIONS ARCS FOCUS Description 2 way passive enclosure amplified by LA4X or LA8 Usable bandwidth 10 dB 55 Hz 20 kHz ARCS_WIFO preset Maximum SPL 137 dB ARCS_WIFO preset Coverage angle 6 dB 15 x 90 LF x 12 weather resistant bass reflex Transducers HF x 3 diaphragm compression driver DOSC waveguide Nominal impedance 19 RMS power handling 450 W Connectors IN
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