L-Acoustics K2 User Manual
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L-Acoustics K2 User Manual

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K2/SB28
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Summary of Contents for L-Acoustics K2

  • Page 1 K2/SB28 user manual (EN)
  • Page 2 Document reference: K2/SB28 user manual (EN) version 7.0 Distribution date: May 4, 2018 © 2018 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: Table Of Contents

    Contents Safety................................4 Instructions..............................4 Symbols..............................4 Welcome................................5 System components.............................6 Technical description............................8 K2 horizontal directivity settings......................... 8 K1-SB applications............................ 9 Loudspeaker congurations..........................10 Line source............................. 10 Additional subwoofer system........................12 K1-SB............................13 SB28............................16 Additional downll element........................18 Kara............................18 Loudspeaker connection............................ 19 Connectors.............................

  • 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

    The K2 loudspeaker enclosure is based on a 3-way active design. It comprises 4 input sections: 2 LF and 1 MF at a nominal impedance of 8 ohms, and 1 HF at a nominal impedance of 16 ohms. It features two 12" speakers and four 6.5", all direct-radiating neodymium speakers mounted in a bass-reex enclosure, and two 3"...

  • Page 6: System Components

    Refer to the LA4X / LA8 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 K2 rigging manual. K2/SB28 user manual (EN) version 7.0...
  • Page 7 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 3.5 m 2WAY 2W CH(A) SUB1 2W CH(B) SUB2 DOFILL-LA8 DO3WFILL K2/SB28 user manual (EN) version 7.0...

  • Page 8: Technical Description

    The K2 enclosure features an adjustable horizontal directivity system. Using the adjustable ns, horizontal directivity can be adjusted with four different settings: 110°/70° symmetric or 90° asymmetric (35°/55° or 55°/35°). A specic K2 preset must be used for each directivity setting.

  • Page 9: K1-Sb Applications

    There are two distinct applications for K1-SB in a K2 system: • As an LF extension in a line source for enhanced throw, using the [K1SB_X K2] preset with K2. • As a subwoofer for increased impact, using the [K1SB_60] preset.

  • Page 10: Loudspeaker ConGurations

    By providing the K1-SB with the same frequency response as the K2 low section, the [K1SB_X K2] preset allows the K1-SB enclosure to be used as an LF line source element, increasing the length of the sub-low line source.
  • Page 11 Recommended ratio 3 K2 : 1 K1-SB Minimum line length 12 K2 + 4 K1-SB When using [K2 70], [K2 90], or [K2 110] with [K1SB_X K2], do not add any delay value between the K2 and K1-SB elements of a same line source.

  • Page 12: Additional Subwoofer System

    Loudspeaker congurations Additional subwoofer system A K2 line source or a K2/K1-SB line source can be deployed with additional subwoofer enclosures to provide increased sub-low resources to demanding applications. Two subwoofer systems are available: • K1-SB for increased LF contour •...

  • Page 13: K1-Sb

    Three deployments are available in this conguration: • K1-SB on top of the K2 line source • K1-SB beside the K2 or K2/K1-SB line source : side LF rejection (polarized) • K1-SB behind the K2 or K2/K1-SB line source : rear LF rejection (cardioid)
  • Page 14 Do not forget to add the pre-alignment and geometric delays depending on the conguration. When using [K2 70], [K2 90], or [K2 110] with [K1SB_X K2], do not add any delay value between the K2 and K1-SB elements of a same line source.
  • Page 15 Do not forget to add the pre-alignment and geometric delays depending on the conguration. When using [K2 70], [K2 90], or [K2 110] with [K1SB_X K2], do not add any delay value between the K2 and K1-SB elements of a same line source.

  • Page 16: Sb28

    [K1SB_60] [SB28_60] Frequency range (-10 dB) 25 Hz - 20 kHz Recommended ratio 3 K2 : 2 subwoofers Grouping subwoofers Place the subwoofer enclosures side by side. If not possible, the maximum distance between two adjacent acoustic centers must be 2.8 m or 1.7 m if the upper frequency limit of the subwoofer system is at 60 Hz or 100 Hz, respectively.
  • Page 17 Do not forget to add the pre-alignment and geometric delays depending on the conguration. When using [K2 70], [K2 90], or [K2 110] with [K1SB_X K2], do not add any delay value between the K2 and K1-SB elements of a same line source.

  • Page 18: Additional DownLl Element

    Do not add any delay between the K2 and Kara elements of a mixed line source. When using [K2 70], [K2 90], or [K2 110] with [K1SB_X K2], do not add any delay value between the K2 and K1-SB elements of a same line source.

  • Page 19: Loudspeaker Connection

    Internal pinout for L-Acoustics 2-way active enclosures speakON points Transducer connectors LF + LF - HF + HF - K2 is equipped with two 8-point PA-COM connectors. LINK Internal pinout for L-Acoustics 3-way active enclosures PA-COM points Transducer connectors left LF right LF K1-SB is equipped with one 4-point speakON connector.
  • Page 20 SB28 is equipped with one 4-point speakON connector. SB28 Weight: 93 kg / 205 lb USE ONLY WITH L-ACOUSTICS AMPLIFIED CONTROLLERS Internal pinout for L-Acoustics subwoofers speakON points Transducer connectors LF + LF - Not linked Not linked K2/SB28 user manual (EN) version 7.0...

  • Page 21: Connection To La4X

    2 enclosures in parallel: LF 4 Ω / HF 4 Ω Connecting 3-way active enclosures custom speakON-to-PA-COM on speakON output L-Acoustics does not supply the speakON-to-PA-COM interface. It must be built with two 4-point speakON connectors and a female 8-point PA-COM connector (no cable clamp). speakON to PA-COM...

  • Page 22: Connection To La8

    2 enclosures in parallel: LF 4 Ω / HF 4 Ω SB28 K1-SB 1 enclosure: 4 Ω Connecting 3-way active enclosures DO on CA-COM output CA-COM Connecting 2-way active enclosures SP on speakON output OUT1/OUT2 OUT3/OUT4 same as OUT1/OUT2 K2/SB28 user manual (EN) version 7.0...
  • Page 23 Connecting a 2-way active enclosure with subwoofers DO and DO3WFILL on CA-COM output 2WAY (OUT3/4) CA-COM SUB1 (OUT1) SUB2 (OUT2) 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 K2/SB28 user manual (EN) version 7.0...
  • Page 24 Loudspeaker connection DO and DOSUB-LA8 on CA-COM output SPK1 (OUT1) CA-COM SPK2 (OUT2) SPK3 (OUT3) SPK4 (OUT4) K2/SB28 user manual (EN) version 7.0...

  • Page 25: Preset Description

    Preset description Preset description [K2 70] [K2 90] [K2 110] loudspeaker elements outputs channels routing gain delay polarity mute left LF OUT 1 IN A 0 dB 0 ms right LF OUT 2 OUT 3 OUT 4 [KARADOWNK2] loudspeaker elements...

  • Page 26: 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 27: SpeciCations

    K2 specications Description 3-way full-range active WST enclosure , quad-amplied by LA4X / LA8 Usable bandwidth (-10 dB) 35 Hz - 20 kHz ([K2 70]) Maximum SPL 147 dB ([K2 70]) Nominal directivity horizontal: 110°/70° symmetric or 90° asymmetric (35°/55° or 55°/35°)
  • Page 28 Specications K2 dimensions 400 mm / 15.8 in 354 mm / 13.9 in 1338 mm / 52.7 in K2/SB28 user manual (EN) version 7.0...

  • Page 29: Kara SpeciCations

    Finish dark grey brown Pantone 426C IP45 Peak level measured at 1 m under free eld conditions using pink noise with crest factor 4 (preset specied in brackets). K2/SB28 user manual (EN) version 7.0...
  • Page 30 Specications Kara dimensions 730 mm / 28.7 in 250 mm / 9.8 in 482 mm / 19 in K2/SB28 user manual (EN) version 7.0...

  • Page 31: K1-Sb SpeciCations

    Rigging components high grade steel with anti-corrosion coating Finish dark grey brown Pantone 426C IP45 Peak level at 1 m under half space conditions using pink noise with crest factor 4 (preset specied in brackets). K2/SB28 user manual (EN) version 7.0...
  • Page 32 Specications K1-SB dimensions 520 mm / 20.5 in 438 mm / 17.1 in 505 mm / 19.9 in 1342 mm / 52.8 in K2/SB28 user manual (EN) version 7.0...

  • Page 33: Sb28 SpeciCations

    Pantone 426C Peak level at 1 m under half space conditions using pink noise with crest factor 4 (preset specied in brackets). SB28 dimensions 700 mm / 27.6 in 1300 mm / 51.2 in K2/SB28 user manual (EN) version 7.0...
  • Page 34 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...

This manual is also suitable for:

Ks28Sb28

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