L-Acoustics LA2Xi Manuel utilisateur
LA2Xi
owner's manual (EN)
Document reference: LA2Xi owner's manual (EN) version 1.0
Distribution date: October 14, 2020
© 2020 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.
Contents
Safety................................................................................................................................................................ 5
Important safety instructions....................................................................................................................... 5
Introduction........................................................................................................................................................ 7
LA2Xi amplied controller..........................................................................................................................7
How to use this manual............................................................................................................................ 7
System components.............................................................................................................................................8
Technical description........................................................................................................................................... 9
Main features........................................................................................................................................... 9
Internal components.........................................................................................................................9
Front and rear panels......................................................................................................................9
Signal processing and amplication........................................................................................................... 9
Signal inputs...................................................................................................................................9
DSP architecture............................................................................................................................10
Power supply and amplier section.................................................................................................12
Speaker outputs............................................................................................................................ 12
Speaker protection........................................................................................................................ 13
Monitoring and control............................................................................................................................13
User interface............................................................................................................................... 13
L-NET remote control network......................................................................................................... 13
Inspection and preventive maintenance...............................................................................................................14
How to do preventive maintenance.......................................................................................................... 14
External structure.....................................................................................................................................14
Cleanness...............................................................................................................................................15
Normal start-up sequence........................................................................................................................ 15
Network functionalities and rmware........................................................................................................15
Installation........................................................................................................................................................16
Mounting................................................................................................................................................16
Ventilation.............................................................................................................................................. 16
General Purpose I/O (GPIO)................................................................................................................... 17
Connecting to AC mains......................................................................................................................... 17
Electrical specications.................................................................................................................. 17
Planning the power of the electrical generator................................................................................. 18
Power cord...................................................................................................................................18
Plugging the amplied controller.....................................................................................................18
Power consumption........................................................................................................................19
3
Heat power calculation..................................................................................................................19
24 V DC Input............................................................................................................................. 19
Audio and network cabling..................................................................................................................... 20
Connection panels.........................................................................................................................20
Analog audio............................................................................................................................... 22
Digital audio................................................................................................................................ 23
L-NET........................................................................................................................................... 23
AVB............................................................................................................................................. 24
Speaker........................................................................................................................................24
Connector references...............................................................................................................................24
Operation........................................................................................................................................................ 25
Powering on/off..................................................................................................................................... 25
Interpreting the front panel LEDs...............................................................................................................25
L-NET........................................................................................................................................... 25
STATUS........................................................................................................................................ 25
Meters..........................................................................................................................................26
Other operations.....................................................................................................................................27
Setting the IP via USB................................................................................................................... 27
Specications................................................................................................................................................... 28
General................................................................................................................................................. 28
Input signal distribution............................................................................................................................30
Latency...................................................................................................................................................31
AVB.......................................................................................................................................................31
Automatic fallback option........................................................................................................................ 31
Remote control and monitoring.................................................................................................................31
Physical data..........................................................................................................................................32
Appendix A - Glossary..................................................................................................................................... 33
Appendix B - List of AVB reservation errors.........................................................................................................33
Appendix C - Approvals................................................................................................................................... 36
4
Safety
Safety
Important safety instructions
Inspect the product before operation.
If any sign of defect or damage is detected, immediately withdraw the product from use for maintenance.
Perform preventive maintenance at least once a year.
Refer to the preventive maintenance section for a list of actions and their periodicity.
Insufcient upkeep of the product can void the warranty.
Verify the electrical conformity and compatibility of the mains supply.
Only connect the product to an AC power outlet rated 100-240 V, 50-60 Hz, with the following current values:
100-120 V: 20 A
200-240 V: 10 A
WARNING: The product is of Class 1 construction and shall be connected to a mains socket outlet with a
protective connection to earth.
When the product is used in a three-phase circuit, verify the electrical conformity and
compatibility of the three-phase circuit.
Verify that the three phases work, and balance the loads between the three phases.
Verify that the neutral and earth work.
Never try to emulate a 230 V circuit connecting an apparatus to two live wires of a 120 V three-phase circuit.
Never try to emulate a 200 V circuit connecting an apparatus to two live wires of a 100 V three-phase circuit.
Always interconnect a Class C circuit breaker between the product and the mains supply.
The circuit breaker current rating depends on the mains voltage rating, as follows:
100-120 V: 20 A
200-240 V: 10 A
Electrical generator
You must power on the generator before powering on the product.
Terminals marked with the lightning ash symbol are HAZARDOUS LIVE.
The external wiring connected to these terminals requires installation by an instructed person or the use of
ready-made leads or cords.
Never attempt to touch any exposed speaker wiring while the product is operating: rst disconnect the connector
from the product.
Mute all output channels before connecting a speaker to an amplied controller.
Do not connect a speaker output in parallel or series with any output of another amplied controller.
Do not connect the speaker outputs to any other voltage source, such as a battery, power mains, or power supply,
regardless of whether the amplied controller is turned on or off.
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.
Intended use
This system is intended for use by trained personnel for professional applications.
As part of a continuous evolution of techniques and standards, L-Acoustics reserves the right
to change the specications 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.
LA2Xi owner's manual (EN) version 1.0 5
Safety
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.
Beware of over power risks.
Only use compatible loudspeakers with appropriate presets to avoid damage to the loudspeakers.
Do not use the product outside its operating temperature range.
The product operates at a room temperature between -5 °C / 23 °F and 50 °C / 122 °F.
Do not expose the product to direct sun.
Do not expose the product to extreme conditions.
Do not expose the product to moisture (rain, mist, sea spray, steam, humidity, condensation…) or excessive heat
(direct sun, radiator…) for a long period of time.
For more information, refer to the Product protection ratings document, available on the website.
Only use the product in a conformed electro-magnetic environment (EN55035 standard).
Avoid radio interference.
This product has been tested and complies with the limits indicated in the EMC directive (Electro Magnetic
Compatibility). These limits are designed to provide reasonable protection against harmful interference from
electrical equipment, but it cannot be guaranteed that interference will never occur.
Product disconnection
To completely disconnect this product from the mains, disconnect the power supply cord plug from the mains
socket outlet.
Power supply cord and socket accessibility
The main plug of the power supply cord shall remain easily accessible.
The mains socket outlet shall be easily accessible.
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.
Before sending a product to L-Acoustics for maintenance, save all user presets to les using LA Network Manager.
Shipping
Use the original packaging for shipping the product, unless it is mounted in a rack with the front and rear panels
xed to the rack, as described in this manual.
6 LA2Xi owner's manual (EN) version 1.0
Introduction
Introduction
LA2Xi amplied controller
LA2Xi is a four-channel amplied controller dedicated to
permanent installations. Designed to match the power
of small format loudspeakers, LA2Xi can also be used to
support larger loudspeakers at lower SPL capability (4 x 4
single-ended mode) or at full SPL capability (4 x 3, 4 x 2
or 4 x 1 bridge mode).
The streamlined and elegant 1U front panel hides a powerful DSP engine with features for loudspeaker management,
protection and monitoring as well as a comprehensive set of tools for system adjustment and calibration. In addition
to analog and AES, LA2Xi integrates AVB signal inputs with Milan seamless network redundancy. Four GPIO and a
24 V DC backup power for the DSP card offer external control and improved reliability. The exible LA2Xi is ideal for
background music systems in leisure venues, distributed lls, studio monitors and private auditorium systems.
How to use this manual
The LA2Xi owner's manual is intended for all actors involved in the system design, implementation, preventive and
corrective maintenance of the LA2Xi product. It must be used as follows:
1. Read the technical description for an overview of all product elements, their features, and their compatibilities.
•Technical description (p.9)
2. Before installing the product, perform mandatory inspections and functional checks.
•Inspection and preventive maintenance (p.14)
3. To deploy the product, follow the step-by-step installation instructions and refer to the cabling schemes.
•Installation (p.16)
•Audio and network cabling (p.20)
4. To congure the settings and parameters of the product, follow the step-by-step operation instructions.
•Operation (p.25)
As part of a continuous evolution of techniques and standards, L-Acoustics reserves the right to
change the specications 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.
Contact information
For information on advanced corrective maintenance:
• contact your Certied Provider or your L-Acoustics representative
• for Certied Providers, contact the L-Acoustics customer service: customer.ser[email protected]
LA2Xi owner's manual (EN) version 1.0 7
System components
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 indicates a potential risk of electrical injury.
It can also notify the user about instructions that must be strictly followed to ensure safe installation or operation of
the product.
This symbol noties the user about instructions that must be strictly followed to ensure proper installation or
operation of the product.
This symbol noties the user about complementary information or optional instructions.
Do not open unless authorized.
This symbol indicates the presence of electrical shock hazards.
It also indicates that no maintenance performed by the end user requires access to internal components.
System components
Loudspeaker enclosures
Refer to the user documentation of the loudspeaker systems for detailed instructions about the enclosures and their
connection to the amplied controllers.
Powering and driving system
LA2Xi Amplied controller with DSP, preset library and networking capabilities
Software applications
LA Network Manager Software for remote control and monitoring of amplied controllers
Refer to the Soundvision help.
Refer to the LA Network Manager help.
Illustrations
LA Network Manager
8 LA2Xi owner's manual (EN) version 1.0
Technical description
Technical description
Main features
Internal components
The core of the LA2Xi is a Gen. 4 dual DSP engine driving four channels of amplication from four inputs. LA2Xi features
a ash memory for preset storage and management, high performance A/D-D/A converters for audio signals, a
universal Switched Mode Power Supply (SMPS) with PFC (Power Factor Correction), and a dual-port Ethernet Gigabit
interface.
Front and rear panels
14
2 3
1. power LED
2. L-NET LED
3. status LED
4. signal LEDs
4
1 2 3 5 6 7
1. V-Lock compatible IEC connector
2. output female 4-point terminal blocks
3. 24 V DC male 2-point terminal block to connect a backup power supply for the DSP
4. General Purpose I/O (GPIO)
5. input/Link male 3-point terminal blocks
6. 1 Gb/s Ethernet etherCON I/O connectors
7. mini USB for conguring IP settings - refer to Setting the IP via USB (p.27)
Signal processing and amplication
Signal inputs
Analog
LA2Xi can be fed with up to four balanced analog audio signals using the four male 3-point terminal blocks (ANA IN A,
ANALOG IN B, ANA IN C, and ANALOG IN D).
The input signals can be transmitted to daisy-chained amplied controllers by wiring the inputs of the next unit in the
same terminal blocks.
To be processed by the DSP, the analog signal must be converted into a digital signal. For this purpose, the LA2Xi
amplied controller is tted with one 32-bit A/D converter with a sampling rate of 96 kHz.
LA2Xi owner's manual (EN) version 1.0 9
Technical description
AES/EBU
LA2Xi can be fed with up to four AES/EBU digital audio signals (transported in pairs) using the two male 3-point terminal
blocks (AES IN A&B and AES IN C&D).
The audio signals can come from a digital mixing desk or from a digital audio network bridge compliant with the AES/
EBU (AES3) digital audio standards.
The input signals can be transmitted to daisy-chained amplied controllers using the two male 3-point terminal blocks
(AES LINK A&B and AES LINK C&D).
Each AES/EBU input port is equipped with an SRC (Sample Rate Converter) that has been selected to support a wide
range of input formats (16 - 24 bits / 44.1 - 192 kHz). The SRC converts the formats to the 24 bits / 96 kHz internal
format used by the amplied controller. The SRC is a high-quality hardware component (140 dB dynamic range,
THD+N<-120dBFS, strong input jitter attenuation) and provides constant propagation delay regardless of the input
sampling frequency.
There is no external synchronization mode. The amplied controller's clock runs using its high-precision internal quartz
at 96 kHz (or on the clock of the connected AVB input stream). This ensures low jitter and high audio quality in live
conditions (large cable lengths, large number of amplied controllers) while preventing phase shift, as required for line
source systems.
Digital domain benets
Keeping the signal in the digital domain provides the following benets (with any digital mixing desk or any audio
network) compared to the analog signal distribution:
• Better audio quality by removing one D/A - A/D cycle.
• Optimized level chain by removing the risk of level misalignment between console and amplied controllers.
• Digital signal refreshed at each amplied controller in a daisy-chain.
• Improved maximum cable length. LA2Xi has been tested with up to 300 m / 984 ft of two models of AES/EBU rated
cables (single cuts, digital source signal running at Fs = 48 kHz):
• 1696A from BELDEN INC.
• OT234H from KLOTZ communications GmbH.
AVB
One AVB stream of up to eight channels may be connected to LA2Xi. LA2Xi retrieves up to four channels from this stream.
Each Ethernet port uses a high speed data transfer protocol up to 1 Gb/s and supports the IEC 61883-6 AM824 and
AAF PCM32 stream formats with stream frequencies of 48 kHz or 96 kHz.
The amplied controller synchronizes its audio clock on the clock used by the talker through the incoming stream.
LA2Xi embeds an AVB bridge and may therefore be used to create an AVB network.
DSP architecture
The proprietary algorithms allow optimum performance and protection of each individual transducer of the L-Acoustics
systems for an even more natural, transparent and realistic sound experience.
• The DSP engine is a 32-bit oating point DSP at 96 kHz sampling rate providing an enhanced dynamic range since
it does not generate calculation clips like a xed point DSP.
• A dedicated engineering approach combining IIR and FIR lters generates perfectly linearized phase curves and
signicantly improved impulse responses.
• The 4 × 4 matrix architecture offers exibility for various system congurations.
• A delay of up to 1000 ms can be set for each output channel.
• The L-DRIVE transducer protection system offers advanced protection by simultaneously monitoring the excursion and
the temperature of the transducer.
• With a complete factory preset library and the possibility to create additional user presets, the ash memory
provides a quick access to all the usual L-Acoustics speaker system congurations (refer to the Preset Guide).
10 LA2Xi owner's manual (EN) version 1.0
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