L-Acoustics K1 Manuel utilisateur

user manual (EN)

Document reference: K1 user manual (EN) version 6.0

Distribution date: May 5, 2021

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.

Contents

Safety................................................................................................................................................................ 4

Instructions................................................................................................................................................4

Symbols................................................................................................................................................... 5

Welcome........................................................................................................................................................... 5

System components.............................................................................................................................................6

System component illustrations....................................................................................................................7

Technical description........................................................................................................................................... 8

K1-SB applications.................................................................................................................................... 8

Loudspeaker congurations..................................................................................................................................9

Line source...............................................................................................................................................9

Additional subwoofer system....................................................................................................................11

K1-SB...........................................................................................................................................11

KS28 or SB28.............................................................................................................................. 13

Additional downll element......................................................................................................................15

Kara............................................................................................................................................ 15

K2............................................................................................................................................... 16

Loudspeaker connection.................................................................................................................................... 17

Connectors............................................................................................................................................. 17

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

Safety

Instructions

Inspect the system before any deployment.

Perform safety related checks and inspections before any deployment.

Perform preventive maintenance at least once a year.

Insufcient upkeep of the product can void the warranty.

If any safety issue is detected during inspection, do not use the product before performing

corrective maintenance.

Check for issues. A rigging system part or fastener is missing or loose. A rigging system part exhibits: bends,

breaks, broken parts, corrosion, cracks, cracks in welded joints, deformation, denting, wear, holes. A safety cue

or label is missing.

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.

Do not store the product on an unstable cart, stand, tripod, bracket, or table.

Beware of sound levels.

Do not stay within close proximity of loudspeakers in operation.

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 at moderate level with prolonged exposure to sound.

Check the applicable laws and regulations relating to maximum sound levels and exposure times.

Intended use

This system is intended for use by trained personnel for professional applications.

Read the RIGGING MANUAL before installing the system.

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.

Check www.l-acoustics.com on a regular basis to download the latest document and software updates.

Long term exposure to extreme conditions may damage the product.

For more information, refer to the Products weather protection document, available on the website.

Read the maintenance section of this document before servicing the product.

Contact L-Acoustics for advanced maintenance.

Any unauthorized maintenance operation will void the product warranty.

This marking indicates that this product should not be disposed of with other household waste throughout the

EU. To prevent possible harm to the environment or human health from uncontrolled waste disposal, recycle it

responsibly to promote the sustainable reuse of material resources. To return your used device, please use the

return and collection systems or contact the retailer where the product was purchased. They can take this product

for environmentally safe recycling.

4 K1 user manual (EN) version 6.0

Welcome

Symbols

The following symbols are used in this document:

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.

This symbol noties the user about instructions that must be strictly followed to ensure proper installation or

operation of the product.

This symbol noties the user about complementary information or optional instructions.

Welcome

Thank you for purchasing the L-Acoustics K1.

This document contains essential information on using the system properly.

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 document without prior notice. Please

check www.l-acoustics.com on a regular basis to download the latest document and software updates.

K1 large format WST line source

The K1 enclosure is the full-range element of a large format WST® line source with variable curvature. The K1 features

two 15" speakers mounted in a bass-reex enclosure, four 6.5" high-efciency direct radiating speakers, and three 3"

diaphragm compression drivers coupled to individual DOSC® waveguides. 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. A four-point rigging system is integrated into the cabinet.

The K1 enclosure operates over the nominal frequency range of 35 Hz to 20 kHz. The frequency response of the system

can be extended down to either 30 Hz or 25 Hz with the addition of the dedicated K1-SB extension, or the KS28SB28

subwoofer, respectively. The K1 generates a symmetric horizontal coverage of 90°.

The rigging system allows vertically assembling K1 enclosures with various inter-element angles up to 5°, constituting

a line array with variable curvature. The combination of the coplanar symmetry and the DOSC® waveguide in the HF

region ensure a perfect acoustic coupling between the elements of an array. The WST® (Wavefront Sculpture Technology)

criteria are fullled, so that such an array can be qualied as a true line source. Any WST® line source provides a smooth

tonal response and a coverage that is free of secondary lobes over the entire frequency range.

The K1 system is driven by the LA8LA12X amplied controller which ensures active system linearization, intelligent

transducer protection, and optimization of the loudspeaker system in its different operating modes. The acoustic

performances of the system will depend upon the used preset and the chosen physical conguration

K1 user manual (EN) version 6.0 5

System components

Loudspeaker enclosures

K1 3-way full-range active WST® enclosure

K2 3-way full-range active WST enclosure

Kara 2-way modular WST enclosure

K1-SB K1 system subwoofer 2×15"

SB28 High power subwoofer: 2 x 18''

KS28 Flyable subwoofer 2 x 18''

Powering and driving system

LA8 / LA12X Amplied controller with DSP, preset library and networking capabilities

Refer to the LA8 / LA12X owner's manual for operating instructions.

Racks

LA-RAK Touring rack containing three LA8 and power, audio and network distribution

LA-RAK II AVB Touring rack containing three LA12X, LA-POWER II for power distribution, LA-PANEL II for audio

and network distribution, and two LS10 for AVB distribution

Cables

SP cables 4-point speakON loudspeaker cables (4mm² gauge)

SP cables come in four sizes: SP.7 (0.7m/2.3ft), SP5 (5m/16.4ft), SP10 (10 m/32.8ft) and

SP25 (25m/82ft)

SP-Y1 breakout cable for two passive enclosures (2.5mm² gauge) provided with a CC4FP adapter

4-point speakON to 2 × 2-point speakON

DO 8-point PA-COM loudspeaker cables (4mm² gauge)

DO cables come in three sizes: DO.7 (0.7m/2.3ft), DO10 (10m/32.8ft) and DO25

(25m/82ft)

DOSUB-LA8 breakout cable for four passive enclosures (4mm² gauge)

8-point PA-COM to 4 × 2-point speakON

DOFILL-LA8 breakout cable for two 2-way active enclosures (4mm² gauge)

8-point PA-COM to 2 x 4-point speakON

DO3WFILL breakout cable for one 2-way active enclosure and two passive enclosures (4mm² gauge)

8-point PA-COM to 1 x 4-point speakON and 2 x 2-point speakON

Information about the connection of the enclosures to the LA amplied controllers is given in

this document.

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.

6 K1 user manual (EN) version 6.0

System components

Software applications

Soundvision 3D acoustical and mechanical modeling software

LA Network Manager Software for remote control and monitoring of amplied controllers

Refer to the Soundvision help.

Refer to the LA Network Manager help.

System component illustrations

Cables

0.7 m / 5 m / 10 m / 25 m

CH(1)

CH(2)

1 m

SP.7 / SP.5 / SP10 / SP25 SP-Y1

0.7 m / 10 m / 25 m

SPK1

SPK2

SPK3

SPK4

5 m

DO.7 / DO10 / DO25 DOSUB-LA8

2W CH(A)

2W CH(B)

3.5 m

2WAY

SUB1

SUB2

3.5 m

DOFILL-LA8 DO3WFILL

Software applications

Soundvision LA Network Manager

K1 user manual (EN) version 6.0 7

Technical description

K1-SB applications

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.

Both applications of K1-SB can be combined in the same conguration.

K1-SB as an LF extension in a line source K1-SB as a subwoofer

K1 LINE SOURCE /

K1/K1-SB LINE SOURCE

K1 LINE SOURCE /

K1/K1-SB LINE SOURCE

ENHANCED THROW INCREASED IMPACT

8 K1 user manual (EN) version 6.0

Loudspeaker congurations

Line source

Deployed as a line source, the system operates over the nominal bandwidth of the K1 enclosure.

Two congurations are possible:

• K1 line source

• 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.

The K1 and K1-SB enclosures are driven by the LA8 / LA12X amplied controllers.

[PRESET]

[K1]

Standalone K1 line source

Enclosure K1

Preset [K1]

Frequency range (-10 dB) 35 Hz - 20 kHz

K1 user manual (EN) version 6.0 9

Loudspeaker congurations

[PRESET]

[K1]

[PRESET]

[K1SB_X]

K1/K1-SB line source

Enclosure K1 K1-SB

Preset [K1] [K1SB_X]

Frequency range (-10 dB) 35 Hz - 20 kHz

Recommended ratio 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.

10 K1 user manual (EN) version 6.0

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