L-Acoustics KS28 User Manual
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L-Acoustics KS28 User Manual

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Summary of Contents for L-Acoustics KS28

  • Page 1 KS28 user manual (EN)
  • Page 2 Document reference: KS28 user manual (EN) version 3.0 Distribution date: March 7, 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...

  • Page 3: Table Of Contents

    Instructions..............................4 Symbols..............................4 Welcome................................5 System components.............................6 Loudspeaker cables........................... 7 Loudspeaker congurations..........................8 KS28 in standard conguration........................8 KS28 in cardioid conguration........................9 Loudspeaker connection............................ 10 Connectors............................. 10 Connection to LA12X..........................11 Preset description..............................13 Recommendation for speaker cables........................14 Maintenance..............................15 Disassembly and Reassembly procedures....................15 D/R - Grill............................16...

  • Page 4: Safety

    Inspect the product before operation. If any sign of defect or damage is detected, immediately withdraw the product from use for maintenance. Never incorporate equipment or accessories not approved by L-Acoustics. Read all the related PRODUCT INFORMATION documents shipped with the products before exploiting the system.

  • Page 5: Welcome

    Vents laminar vented port reduce turbulence and port noise at high levels while also increasing LF efciency. The KS28 operates from 25 Hz. The excursion capability of the transducer, combined with L-Vents contributes to deliver a high SPL, with low distortion. The KS28 can offer standard or cardioid directivity, by combining physical deployment and the suitable preset.

  • Page 6: System Components

    Refer to the LA12X user manual for detailed instructions about the whole cabling scheme, including modulation cables and network. Rigging elements Rigging elements or procedures are not presented in this document. Refer to the KS28 rigging manual. Software applications Soundvision 3D acoustical and mechanical modeling software LA Network Manager Software for remote control and monitoring of amplied controllers...

  • Page 7: Loudspeaker Cables

    CH(2) SP.7 / SP5 / SP10 / SP25 SP-Y1 SPK1 SPK2 0.7 m / 10 m / 25 m SPK3 SPK4 DO.7 / DO10 / DO25 DOSUB-LA8 3.5 m 2W CH(A) 2W CH(B) DOFILL-LA8 KS28 user manual (EN) version 3.0...

  • Page 8: Loudspeaker ConGurations

    Loudspeaker congurations KS28 in standard conguration Deployed in a standard conguration, a KS28 system operates with an omnidirectional directivity pattern over the nominal bandwidth of the KS28 enclosure. The [KS28_60] and [KS28_100] factory presets provide the subwoofer system with an upper frequency limit at 60 Hz and 100 Hz respectively in order to optimize the acoustic coupling with a main full-range system.

  • Page 9: Ks28 In Cardioid ConGuration

    KS28 in cardioid conguration Deployed in a cardioid conguration, a KS28 system produces a rear SPL rejection. The deployment consists of an array of four KS28 with one reversed element, i.e. turned towards the rear. Refer to the Cardioid Congurations technical bulletin for more information.

  • Page 10: Loudspeaker Connection

    Loudspeaker connection Loudspeaker connection Connectors KS28 is equipped with one 4-point speakON connector. KS28 KS28 Weight: 79 kg / 174 lb 1k = IN k SAFE USE: 1 - = IN - 16 KS28 Znom. = 4 Ω FOROTHERCONFIGURATIONS,CHECKMECHANICAL SAFETYWITHSOUNDVISIONSOFTWARE...

  • Page 11: Connection To La12X

    Connecting subwoofers SP and SP-Y1 on speakON output CH(1) (OUT1) SP-Y1 CC4FP CH(2) (OUT2) OUT3/OUT4 OUT1/OUT2 same as OUT1/OUT2 DO and DOSUB-LA8 on CA-COM output SPK1 (OUT1) CA-COM SPK2 (OUT2) SPK3 (OUT3) SPK4 (OUT4) KS28 user manual (EN) version 3.0...
  • Page 12 Loudspeaker connection Connecting a 2-way active enclosure with subwoofers DO and DO3WFILL on CA-COM output 2WAY (OUT3/4) CA-COM SUB1 (OUT1) SUB2 (OUT2) KS28 user manual (EN) version 3.0...

  • Page 13: Preset Description

    0 ms OUT 4 IN A 0 dB 0 ms [KS28_60_C] [KS28_100_C] loudspeaker elements outputs channels routing gain delay polarity mute OUT 1 IN A 0 dB 0 ms OUT 2 OUT 3 OUT 4 KS28 user manual (EN) version 3.0...

  • Page 14: Recommendation For Speaker Cables

    4 Ω load 2.7 Ω load For your installation projects, you can use the more detailed L-ACOUSTICS calculation tool to evaluate cable length and gauge based on the type and number of enclosures connected. The calculation tool is available on our website: http://www.l-acoustics.com/installation-outils-de-calcul-137.html...

  • Page 15: Maintenance

    Maintenance Maintenance Disassembly and Reassembly procedures In order to operate, follow the order outlined here. GRILL KR SECUGRL LF LOUDSPEAKER G03229 KS28 user manual (EN) version 3.0...

  • Page 16: D/R - Grill

    — 5 mm hex bit — screwdriver extension — 100226 provided in KR SECUGRL Disassembly 1. Loosen the captive grill screw. 5 mm 2. Slide the grill to remove it. If necessary, pull down the safety O-ring. KS28 user manual (EN) version 3.0...
  • Page 17 Maintenance Reassembly 1. Position the grill starting with the top. 2. With the 100226, stretch the O-ring and pull it above the captive screw. KS28 user manual (EN) version 3.0...
  • Page 18 Maintenance 3. Secure the grill with the captive screw. 3 N.m 5 mm KS28 user manual (EN) version 3.0...

  • Page 19: D/R - Lf Loudspeaker

    For safety reasons, always use the new screws and spare parts provided in the KR. If no new screws are available, use blue threadlocker. Exploded view Gradually tighten the screws following a star pattern. Check that the cable tie is intact. 5 N.m 5 mm KS28 user manual (EN) version 3.0...

  • Page 20: Acoustical Check

    The amplied controller displays the results for each output. 7. Depending on the displayed results, follow the instructions in the table. result interpretation instructions measured impedance is within expected range enclosure is in working order electrically KS28 user manual (EN) version 3.0...
  • Page 21 — a percentage of variation from the expected range (found in NOK and UNDEF results) — the number of operational transducers out of the total Low variations from the expected range are acceptable: displayed percentage can be different from 0 and all transducers considered operational. KS28 user manual (EN) version 3.0...

  • Page 22: Listening Test

    Apply the recommended torque. 5. Repeat the listening test. 6. If a buzzing sound is still audible, repeat the test on the loudspeaker outside of the enclosure. If the problem persists, replace the loudspeaker. KS28 user manual (EN) version 3.0...

  • Page 23: Ks28 SpeciCations

    3D fabric Rigging components high grade steel Finish dark grey brown Pantone 426C Peak level at 1 m under half space conditions using pink noise with crest factor 4 (preset specied in brackets). KS28 user manual (EN) version 3.0...
  • Page 24 KS28 specications KS28 dimensions 702 mm / 27.6 in 1340 mm / 52.8 in 1351 mm / 53.2 in KS28 user manual (EN) version 3.0...
  • Page 25 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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