L-Acoustics K1 User Manual
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user manual (EN)

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Summary of Contents for L-Acoustics K1

  • Page 1 user manual (EN)
  • Page 2 Document reference: K1 user manual (EN) version 6.0 Distribution date: May 5, 2021 © 2021 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

    Connection to LA8..........................19 Connection to LA12X..........................20 Preset description..............................23 Recommendation for speaker cables........................24 Corrective maintenance............................. 25 K1................................. 25 K1 exploded views........................25 Disassembly and Reassembly procedures..................27 K1-SB..............................35 K1-SB exploded view........................35 Disassembly and Reassembly procedures..................36 Acoustical check............................. 38 Specications..............................42...
  • Page 4: Safety

    Use the rigging accessories described in the rigging manual and follow the associated procedures. As part of a continuous evolution of techniques and standards, L-Acoustics reserves the right to change the specications of its products and the content of its documents without prior notice.
  • Page 5: Symbols

    The transducers are implemented in a K- shape conguration. The K1 enclosure is based on a 3-way active design with 2 LF sections, 1 MF section and 1 HF section, each one at the nominal impedance of 8 ohms. The K1 enclosure is made of rst grade Baltic birch plywood to ensure maximum acoustical and mechanical integrity.
  • Page 6: System Components

    Refer to the LA8 / LA12X owner's 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 K1 rigging manual. K1 user manual (EN) version 6.0...
  • Page 7: System Component Illustrations

    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 Software applications Soundvision LA Network Manager K1 user manual (EN) version 6.0...
  • Page 8: Technical Description

    There are two distinct applications for K1-SB in a K1 system: • As an LF extension in a line source for enhanced throw, using the [K1SB_X] preset with K1. • As a subwoofer for increased impact, using the [K1SB_60] preset.
  • Page 9: Loudspeaker ConGurations

    • K1/K1-SB line source: enhanced LF throw By providing the K1-SB with the same frequency response as the K1 low section, the [K1SB_X] 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 10 2 K1 : 1 K1-SB Minimum line length 8 K1 + 4 K1-SB When using [K1] with [K1SB_X], do not add any delay value between the K1 and K1-SB elements of a same line source. K1 user manual (EN) version 6.0...
  • Page 11: Additional Subwoofer System

    KS28 is driven by the LA12X amplied controller. K1-SB K1-SB provides an extension of the bandwidth in the low end, down to 30 Hz. Depending on the deployment, LF rejection can be produced. Two deployments are available in this conguration: •...
  • Page 12 Delay values Do not forget to add the pre-alignment and geometric delays depending on the conguration. When using [K1] with [K1SB_X], do not add any delay value between the K1 and K1-SB elements of a same line source. Pre-alignment delays...
  • Page 13: Ks28 Or Sb28

    The KS28/SB28 subwoofers provide an extension of the bandwidth in the low end, down to 25 Hz. Line source with KS28 or SB28 [PRESET] [xxxx_60] Enclosure K1 K1-SB in line source K1-SB as subwoofer KS28 or SB28 Preset [K1] [K1SB_X] [K1SB_60] [xxxx_60]...
  • Page 14 Delay values Do not forget to add the pre-alignment and geometric delays depending on the conguration. When using [K1] with [K1SB_X], do not add any delay value between the K1 and K1-SB elements of a same line source. Pre-alignment delays are identical for KS28 and SB28.
  • Page 15: Additional DownLl Element

    Kara array Up to 6 Kara enclosures Do not add any delay between the K1 and Kara elements of a mixed line source. When using [K1] with [K1SB_X], do not add any delay value between the K1 and K1-SB elements of a same line source.
  • Page 16 Frequency range (-10 dB) 35 Hz - 20 kHz Do not add any delay between the K1 and K2 elements of a mixed line source. When using [K1] with [K1SB_X], do not add any delay value between the K1 and K1-SB elements of a same line source.
  • Page 17: Loudspeaker Connection

    Internal pinout for L-Acoustics 2-way active enclosures speakON points Transducer connectors LF + LF - HF + HF - K1 is equipped with two 8-point PA-COM connectors. LINK K2 is equipped with two 8-point PA-COM connectors. LINK K1 user manual (EN) version 6.0...
  • Page 18 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. KS28 is equipped with one 4-point speakON connector. KS28 Weight: 79 kg / 174 lb 1k = IN k...
  • Page 19: Connection To La8

    1 enclosure: LF 8 Ω / HF 8 Ω 2 enclosures in parallel: LF 4 Ω / HF 4 Ω 3 enclosures in parallel: LF 2.7 Ω / HF 2.7 Ω SB28 K1-SB 1 enclosure: 4 Ω K1 user manual (EN) version 6.0...
  • Page 20: Connection To La12X

    2 enclosures in parallel: LF 4 Ω / HF 4 Ω 3 enclosures in parallel: LF 2.7 Ω / HF 2.7 Ω SB28 KS28 K1-SB 1 enclosure: 4 Ω Connecting 3-way active enclosures DO on CA-COM output CA-COM K1 user manual (EN) version 6.0...
  • Page 21 SPK1 (OUT1) CA-COM SPK2 (OUT2) SPK3 (OUT3) SPK4 (OUT4) Connecting 2-way active enclosures SP on speakON output OUT1/OUT2 OUT3/OUT4 same as OUT1/OUT2 DO and DOFILL-LA8 on CA-COM output 2W CH(A) (OUT1/OUT2) CA-COM 2W CH(B) (OUT3/OUT4) K1 user manual (EN) version 6.0...
  • Page 22 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) K1 user manual (EN) version 6.0...
  • Page 23: Preset Description

    OUT 4 IN A 0 dB 0 ms [KS28_60_C] [KS28_60_Cx] [SB28_60_C] [SB28_60_Cx] loudspeaker elements outputs channels routing gain delay polarity mute OUT 1 IN A 0 dB 0 ms OUT 2 OUT 3 OUT 4 K1 user manual (EN) version 6.0...
  • Page 24: Recommendation For Speaker Cables

    8 Ω load 4 Ω load 2.7 Ω load 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: https://www.l-acoustics.com/en/installation/tools/...
  • Page 25: Corrective Maintenance

    Corrective maintenance Corrective maintenance K1 exploded views In order to operate, follow the order outlined here. Each assembly refers to the corresponding Disassembly/Reassembly (D/R) procedure and the necessary repair kit. LF SPEAKER KR HPPH154 GRILL K1 user manual (EN) version 6.0...
  • Page 26 Corrective maintenance FINS MF SPEAKER KR HPPH62 GRILL HF DIAPHRAGM KR HSBC33 CONNECTOR PLATE HF DRIVER KR HPBC33 K1 user manual (EN) version 6.0...
  • Page 27: Disassembly And Reassembly Procedures

    For safety reasons, always use the new screws and spare parts provided in the KR. If no new screws are available, use blue threadlocker. Use a at tool to pull the O-ring over the logo. 3 N.m 4 mm K1 user manual (EN) version 6.0...
  • Page 28 For safety reasons, always use the new screws and spare parts provided in the KR. If no new screws are available, use blue threadlocker. Gradually tighten the screws following a star pattern. 5 N.m 5 mm What to do next Perform the Acoustical check (p.38) procedures. K1 user manual (EN) version 6.0...
  • Page 29 Corrective maintenance D/R - Fins Tools • torque screwdriver • T20 Torx bit Prerequisite Grill disassembled. Grill (p.27). Exploded view Save the screws and fasteners for reassembly. 3 N.m K1 user manual (EN) version 6.0...
  • Page 30 Exploded view For safety reasons, always use the new screws and spare parts provided in the KR. 5 N.m 5 N.m 4 mm 4 mm What to do next Perform the Acoustical check (p.38) procedures. K1 user manual (EN) version 6.0...
  • Page 31 For safety reasons, always use the new screws and spare parts provided in the KR. If no new screws are available, use blue threadlocker. If the gasket is damaged, remove and replace it. 3 N.m K1 user manual (EN) version 6.0...
  • Page 32 For safety reasons, always use the new screws and spare parts provided in the KR. If no new screws are available, use blue threadlocker. If the gasket is damaged, remove and replace it. 5 N.m 5 mm What to do next Perform the Acoustical check (p.38) procedures. K1 user manual (EN) version 6.0...
  • Page 33 Kit diaphragm for 3'' driver ×1 ×4 03024 S03024 diaphragm for 1.4" driver - 20 ohms (with shims) M4×14 hex Prerequisite Connector plate removed. Connector plate (p.31). HF loudspeaker removed. HF driver (p.32) Exploded view K1 user manual (EN) version 6.0...
  • Page 34 Tighten the screws in the same order with the torque screwdriver. Use the 3 mm hex bit and set the torque to 3.5 Nm. What to do next Perform the Acoustical check (p.38) procedures. K1 user manual (EN) version 6.0...
  • Page 35: K1-Sb

    Corrective maintenance K1-SB K1-SB exploded view In order to operate, follow the order outlined here. Each assembly refers to the corresponding Disassembly/Reassembly (D/R) procedure and the necessary repair kit. LF SPEAKER KR HPPH154 GRILL K1 user manual (EN) version 6.0...
  • Page 36: Disassembly And Reassembly Procedures

    The enclosure is placed on its top. Exploded view For safety reasons, always use the new screws and spare parts provided in the KR. If no new screws are available, use blue threadlocker. 3 N.m 4 mm K1 user manual (EN) version 6.0...
  • Page 37 Grill disassembled. Grill (p.36). Exploded view For safety reasons, always use the new screws and spare parts provided in the KR. If no new screws are available, use blue threadlocker. 5 N.m 5 mm K1 user manual (EN) version 6.0...
  • Page 38: Acoustical Check

    6. Press the OK key or the encoder wheel to launch the ENCLOSURE CHECK. The amplied controller generates short sinusoidal signals simultaneously for each connected output. The amplied controller displays the results for each output. K1 user manual (EN) version 6.0...
  • Page 39 • 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. K1 user manual (EN) version 6.0...
  • Page 40 • The diaphragm is not centered correctly. • The screws used for reassembly are too loose. • The diaphragm is damaged. • The number of shims is wrong. Procedure 1. Perform the diaphragm disassembly procedure. K1 user manual (EN) version 6.0...
  • Page 41 Apply the recommended torque. 5. Repeat the listening test. If a buzzing sound is still audible, it might be necessary to add an extra shim on the air gap. If the problem persists, replace the driver. K1 user manual (EN) version 6.0...
  • Page 42: SpeciCations

    Description ® 3-way full-range active WST enclosure , quad-amplied by LA8 / LA12X Usable bandwidth (-10 dB) 35 Hz - 20 kHz ([K1]) Maximum SPL 149 dB ([K1]) Nominal directivity (-6 dB) horizontal: 90° symmetric vertical: dependent upon the number of elements and the line source curvature Transducers LF: 2 ×...
  • Page 43 Finish dark grey brown Pantone 426 C IP55 Peak level measured at 1 m under free eld conditions using pink noise with crest factor 4 (preset specied in brackets). K1 user manual (EN) version 6.0...
  • Page 44 Specications K2 dimensions 400 mm / 15.8 in 354 mm / 13.9 in 1338 mm / 52.7 in K1 user manual (EN) version 6.0...
  • Page 45 Finish dark grey brown Pantone 426 C IP45 Peak level measured at 1 m under free eld conditions using pink noise with crest factor 4 (preset specied in brackets). K1 user manual (EN) version 6.0...
  • Page 46 Specications Kara dimensions 730 mm / 28.7 in 250 mm / 9.8 in 482 mm / 19 in K1 user manual (EN) version 6.0...
  • Page 47 Specications K1-SB specications Description K1 system subwoofer 2×15", amplied by LA8 / LA12X Low frequency limit (-10 dB) 30 Hz ([K1SB_60]) Maximum SPL 145 dB ([K1SB_X]) Transducers 2 × 15" cone drivers Acoustical load bass-reex, L-Vents Nominal impedance 4 Ω...
  • Page 48 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 K1 user manual (EN) version 6.0...
  • Page 49 Peak level at 1 m under half space conditions using pink noise with crest factor 4 (preset specied in brackets). KS28 dimensions 702 mm / 27.6 in 1340 mm / 52.8 in 1351 mm / 53.2 in K1 user manual (EN) version 6.0...
  • Page 50 Rigging components high grade steel with anti-corrosion coating Finish dark grey brown Pantone 426 C Peak level at 1 m under half space conditions using pink noise with crest factor 4 (preset specied in brackets). K1 user manual (EN) version 6.0...
  • Page 51 Specications SB28 dimensions 700 mm / 27.6 in 1300 mm / 51.2 in K1 user manual (EN) version 6.0...
  • Page 52 L-Acoustics 13 rue Levacher Cintrat - 91460 Marcoussis - France +33 1 69 63 69 63 - info@l-acoustics.com www.l-acoustics.com...

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