L-Acoustics ARCS II User Manual
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L-Acoustics ARCS II User Manual

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Summary of Contents for L-Acoustics ARCS II

  • Page 1 ARCS II user manual (EN)
  • Page 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.
  • Page 3 SAFETY INSTRUCTIONS 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.

  • Page 4: Table Of Contents

    ® 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 document without prior notice.

  • Page 5: Arcs Ii 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.

  • Page 6: System Components

    VERSION 3.0 2 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.
  • Page 7 ARCS ® SB28 DO3WFILL DOFILL-LA8 SPY1 DOSUB-LA8 DO.7 LA-RAK DO10 SP10 DO25 LA4X SP25 LA Network Manager Soundvision ARCS II system components (excluding rigging elements and modulation cables) ® ARCSII_UM_EN_3.0 w w w . l - a c o u s t i c s . c o m...

  • Page 8: Loudspeaker Configurations

    II system operates over the nominal bandwidth of the ARCS II enclosure. ® ® 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 ®...

  • Page 9: Line Source With Low-Frequency Element

    II line source deployed with SB28 subwoofers, the system bandwidth is extended in the low end. The [ARCS II] preset allows for a reference frequency response in medium throw applications. The [SB28_60] preset provides the subwoofer enclosures with an upper frequency limit at 60 Hz for an optimal frequency coupling with the ARCS II line source.

  • Page 10: Loudspeaker Connection

    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 ®...

  • Page 11: Connecting Arcs ® Ii To La4X

    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. ARCSII_UM_EN_3.0 w w w .

  • Page 12: Connecting Arcs ® Ii To La8

    ARCS ® SYSTEM user manual VERSION 3.0 Connecting ARCS ® II to LA8 Maximum of 4 enclosures per LA8 2 ARCS II can be connected to each pair of output channels on the LA8 (1/2 and 3/4). ® Impedance load 1 enclosure 8 Ω...
  • Page 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. ARCSII_UM_EN_3.0 w w w . l - a c o u s t i c s . c o m...
  • Page 14  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. ARCSII_UM_EN_3.0...

  • Page 15: Connecting Sb28 To La8

    Connecting SB28 to LA8 Maximum of 4 enclosures per LA8 1 SB28 can 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 ...
  • Page 16 ARCS ® SYSTEM user manual VERSION 3.0 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.

  • Page 17: Appendix Apreset Description

    APPENDIX A PRESET DESCRIPTION [ARCS II] The [ARCS II] preset allows for a reference frequency response in medium throw applications. Default parameters Loudspeaker elements Amplifier outputs Channels Routing Gain Delay Polarity Mute OUT 1 ARCS II IN A 0 dB...

  • Page 18: Appendix Brecommandation For Speaker Cables

    ARCS ® SYSTEM user manual VERSION 3.0 APPENDIX B RECOMMANDATION FOR SPEAKER CABLES 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.

  • Page 19: Appendix Cspecifications

    ® Description 2-way active enclosure, amplified by LA4X / LA8 / LA12X Usable bandwidth (-10 dB) 50 Hz - 20 kHz ([ARCS II] preset) Maximum SPL 142 dB ([ARCS II] preset) Coverage angle (-6 dB) 22.5° symmetric x 60° asymmetric (-20°/+40°) LF 1 ...
  • Page 20 ARCS ® SYSTEM user manual VERSION 3.0 SB28 Description Subwoofer enclosure, amplified by LA8 / LA12X Low frequency limit (‑10 dB) 25 Hz ([SB28_100] preset) Maximum SPL 142 dB ([SB28_100] preset) RMS power handling 1255 W 2  18" neodymium, weather-resistant, direct radiation, bass-reflex Transducers Nominal impedance 4 Ω...
  • Page 21 L-Acoustics, an L-Group Company 13 rue Levacher Cintrat – 91460 Marcoussis – France +33 1 69 63 69 63 – info@l-acoustics.com www.l-acoustics.com L-Acoustics GmbH L-Acoustics Ltd. L-Acoustics Inc. Steiermärker Str. 3-5 PO. Box Adler Shine - Aston House 2645 Townsgate Road, Suite 600...

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