L-Acoustics LA4X Product Information
LA4X amplified controller
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PRODUCT INFORMATION
VERSION 5.0
PRODUCT Serial Number: #________________________________
www.l- a c o u s t i c s . c o m
LA4X amplified controller
PRODUCT INFORMATION
VERSION 5.0
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Explanation of Graphical Symbols
The lightning flash with arrowhead symbol within an
equilateral triangle is intended to alert the user to
the presence of uninsulated “dangerous voltage”
within the product’s enclosure that may be of
sufficient magnitude to constitute a risk of electric
shock to persons.
The exclamation point within an equilateral triangle
is intended to alert the user to the presence of
important operating and maintenance instructions in
the literature accompanying the product.
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or
sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus
combination to avoid injury from tip-over.
Document reference: LA4X_PI_EN_5.0
Distribution date: October 28, 2014
© 2014 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.
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the grounding-type plug. A grounding-type plug has two blades
and a third grounding prong. The third prong is provided for your safety. If the provided plug does not
fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience
receptacles, and the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate
normally, or has been dropped.
15. WARNING: To reduce the risk of fire or electric shock, this apparatus should not be exposed to rain
or moisture and objects filled with liquids, such as vases, should not be placed on this apparatus.
16. To completely disconnect this equipment from the mains, disconnect the power supply cord plug from
the receptacle.
17. The main plug of the power supply cord shall remain readily operable.
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LA4X amplified controller
14. WARNING: TERMINALS marked with the lightning flash 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 apparatus is operating: first disconnect the
connector from the apparatus.
Mute all output channels before connecting a speaker to the apparatus.
Do not connect a speaker output in parallel or series with any output of another amplifier.
Do not connect the speaker outputs to any other voltage source, such as a battery, power mains, or
power supply, regardless of whether the apparatus is turned on or off.
PRODUCT INFORMATION
VERSION 5.0
ADDITIONAL IMPORTANT SAFETY INSTRUCTIONS
1. Read this document.
2. Read all SAFETY INSTRUCTIONS carefully as well as DANGER and OBLIGATION warnings.
3. Never incorporate equipment or accessories not approved by L-ACOUSTICS
4. Read the USER MANUAL before installing and operating the apparatus.
Use the system components described in the user manual and follow the associated instructions.
To ensure sufficient ventilation, install the apparatus in an open area so that the front and rear panels are located
at a minimum distance of 30 cm from any external object or structure.
5. Read the MAINTENANCE MANUAL – LEVEL 1 before performing any maintenance operation on the
apparatus or in case of malfunction.
This manual only contains the maintenance operations authorized for the End User. Contact L-ACOUSTICS® for
advanced maintenance.
6. Inspect the apparatus before use.
If any sign of defect or damage is detected, immediately withdraw the apparatus from use for maintenance.
7. Only use the apparatus in a conformed electro-magnetic environment.
Conformed environments are specified in EN55103-2 standard as E1 (residential), E2 (commercial and light
industrial), E3 (urban outdoors), and E4 (controlled EMC environment, ex. TV studio).
®
.
8. Avoid radio interference.
This apparatus has been tested and complies with the limits indicated in the EMC (Electro Magnetic Compatibility)
directive. These limits are designed to provide reasonable protection against harmful interference from electrical
equipment, but it cannot be guaranteed that interference will never occur.
9. Verify the electrical conformity and compatibility of the mains supply.
Only connect the apparatus to an AC power outlet rated 100-240 V, 50-60 Hz, with the following current values:
20 A for 100-120 V, 10 A for 200-240 V.
WARNING: An apparatus with CLASS I construction shall be connected to a mains socket outlet with a protective
connection to earth.
10. Verify the electrical conformity and compatibility of the three-phase circuit.
Verify that each phase works, in particular the neutral one.
Balance the loads between the three phases.
Never try to reproduce a 230 V circuit connecting an apparatus to two live wires of a 120 V three-phase circuit.
Never try to reproduce a 200 V circuit connecting an apparatus to two live wires of a 100 V three-phase circuit.
11. Always interconnect a Class C thermal circuit breaker between the apparatus and the mains supply.
The circuit breaker current rating depends on the mains voltage rating as follows:
20 A for 100-120 V, 10 A for 200-240 V.
12. Be aware of over power risks.
The apparatus is very powerful and can be potentially dangerous to both loudspeakers and humans alike.
Even reducing the gain it is still possible to reach very high output power if the input signal level is high enough.
13. Do not use the apparatus outside its operating temperature range.
The apparatus operates at a room temperature between 0 °C and +50 °C.
Do not expose the apparatus to direct sun.
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15. Do not place naked flame sources, such as lighted candles, on the apparatus.
16. Use the original packaging or accessories approved by L-ACOUSTICS
®
(rack, case) to transport the
apparatus.
17. Maintain this document as an integral part of the apparatus.
Keep this document in a safe place.
Write down any modification to the apparatus on the last page of this document.
Do not resell the apparatus without this updated document.
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LA4X amplified controller
DANGER
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.
PRODUCT INFORMATION
VERSION 5.0
SYMBOL
The following symbol is used in this document:
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WELCOME TO L-ACOUSTICS®
Thank you for purchasing the L-ACOUSTICS® LA4X amplified controller. The shipping carton should contain:
One LA4X amplified controller.
Two rear rack support brackets.
One power cable.
Depending on the country of distribution, the cable is fitted with a European type CEE 7/7 plug (KC certified), a
Chinese type GB1002 GB2099 16A plug, or a North American type NEMA 5-15 plug.
Importer is required to replace the plug with a country specific version, if necessary.
After the careful opening of the shipping carton, check for any noticeable damage. If so, notify the shipping company or
the distributor immediately. Only the consignee may initiate a claim with the carr ier for damage incurred during
shipping. Be sure to save the carton and packing materials to be inspected by the carrier.
Carefully read this document in order to become familiar with the product and to identify the external documents
containing essential information on installing and operating the product properly and safely. All the documents
mentioned hereafter are freely available on the L-ACOUSTICS® web site: www.l-acoustics.com.
As part of a continuous evolution of techniques and standards, L-ACOUSTICS® reserves the right to
change the specifications of its products and the content of its documents without prior notice. Please visit
the L-ACOUSTICS® web site on a regular basis to download latest updates for documents and software.
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LA4X amplified controller
Refer to the LA4X user manual for installation and operation procedures.
Follow the procedures described in this manual. If necessary use the Replacement Kits (KR) provided by
L-ACOUSTICS®.
Any maintenance operation not recommended by L-ACOUSTICS® will void the warranty. Contact
L-ACOUSTICS® for advanced maintenance.
PRODUCT INFORMATION
VERSION 5.0
LA4X amplified controller
The LA4X is an amplified controller based on a 4-input by 4-output architecture and an exclusive green power module
providing maximized efficiency. With LA4X, L-ACOUSTICS® speakers can get all the benefits of self-powered speakers,
while keeping the versatility of the separated amplification approach.
The core of the LA4X is a DSP engine driving four channels of amplification from four inputs. The LA4X also features a
flash memory for preset storage and management, high performance A/D-D/A converters for audio signals, a universal
SMPS (Switched Mode Power Supply) with PFC (Power Factor Correction), a front panel user interface, and a Fast
Ethernet device for network remote control.
USING THE LA4X
MAINTENANCE
It is essential to inspect the product on a regular basis to ensure performance and safety.
Refer to the LA4X maintenance manual – level 1 for information about troubleshooting and periodic maintenance.
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L-ACOUSTICS®
13 rue Levacher Cintrat
Parc de la Fontaine de Jouvence
91462 Marcoussis Cedex
France
States that the following product:
LA4X amplified controller
100-240 V ~ / 50-60 Hz / 750 W
Is in conformity with the provisions of:
2014/35/EU: Low Voltage Directive
2004/108/EC: Electro-Magnetic Compatibility Directive
2011/65/EU: ROHS2 Directive
Applied rules and standards:
EN60065 Safety requirements for audio, video and similar
electronic apparatus
EN55103-1 Electromagnetic compatibility - Product family
standard for audio, video, audio-visual and entertainment
lighting control apparatus for professional use - Part 1:
Emissions
EN55103-2 Electromagnetic compatibility - Product family
standard for audio, video, audio-visual and entertainment
lighting control apparatus for professional use - Part 2:
Immunity
EN50581 Technical documentation for the assessment of
electrical and electronic products with respect to the
restriction of hazardous substances
Established at Marcoussis, France,
July 15, 2014
Genio KRONAUER
Head of Electronics Department
The LA4X amplified controller holds the following certificates:
KC, PSE, CSA and CCC
EC DECLARATION OF CONFORMITY
ADDITIONAL APPROVALS
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LA4X amplified controller
GENERAL
Output power
EIA (1% THD, 1 kHz, all channels driven)
4 x 1000 W RMS (at 4 or 8 Ω)
Max output voltage
150 V (Peak voltage, no load)
Amplification class
Class D
Digital Signal Processor (DSP)
SHARC 32 bit, floating point, 96 kHz sampling rate
Frequency response
20 Hz-20 kHz (±0.25 dB at 8 Ω)
Distortion THD+N
< 0.05 % (20 Hz-10 kHz, 8 Ω, 11 dB below rated power)
Output dynamic range
110 dB (20 Hz-20 kHz, 8 Ω, A-weighted)
Amplification gain
32 dB
Noise level
-71 dBV (20 Hz-20 kHz, 8 Ω, A-weighted)
Channel separation
> 80 dB (at 1 kHz, 8 Ω)
Damping factor
> 500 (100 Hz and below, 8 Ω)
Mains input power
and current draw
(all channels driven)
Maximum output power
Mains input power and current draw
Load
Nb. of driven
channels
Power
per
channel
1/3 Output
Power (-5 dB)
1/8 Output
Power (-9 dB)
IDLE
Standby
4 or 8
Ω
4
1000 W
7 A / 1600 W
3 A / 750 W
0.26A /
60 W
< 0.1 A /
11 W
Current values given for a mains rated at 230 V. Multiply by 2.3 for 100 V, 1.9 for 120 V or 1.15 for 200 V.
Power supply
Model
universal SMPS
(Switched Mode Power Supply)
Power Factor
Correction (PFC)
yes
cos > 0.9 (4 Ω, full power)
Mains ratings
100-240 V~ ±10 %, 50-60 Hz
Operating temperature
Room temperature
from 0 °C to +50 °C
Circuits protection
heat-sinks temperature monitoring
output over current protection
Transducers protection
L-DRIVE thermal and over excursion protection
Fans
2 fans, temperature-controlled speed
Fans noise (free field, 1m)
At minimum speed
At maximum speed
20 dBA
45 dBA
Indicators
POWER LED
4 mute LED
STATUS LED
L-NET presence LED
For each output: LOAD LED, signal and LIMIT/CLIP level
Output Connectors
4 x 4-point SpeakON
OUT1 to OUT4
(including OUT1/2 and OUT3/4)
L-NET connectors
2 x Fast Ethernet EtherCON
PRODUCT INFORMATION
VERSION 5.0
LA4X SPECIFICATIONS
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INPUT SIGNAL DISTRIBUTION
Connectors
Input
Link
4 Neutrik® female XLR3, IEC 268, ESD protected
4 Neutrik® male XLR3, IEC 268, ESD protected
Available input
connectors vs.
input mode
Analog AB / Analog CD
Analog AB / Digital CD
Digital AB / Analog CD
Digital AB / Digital CD
IN A, IN B / IN C, IN D (4 connectors, 4 channels)
IN A, IN B / IN C&D (3 connectors, 4 channels)
IN A&B / IN C, IN D (3 connectors, 4 channels)
IN A&B / IN C&D (2 connectors, 4 channels)
Link connectors
Analog input mode
Digital input mode
passively connected
electronically buffered, failsafe relay
ANALOG INPUT DATA
Input impedance
22 kΩ (balanced)
Max input level
22 dBu (balanced, THD 1 %)
Latency
3.84 ms
A/D conversion
four cascaded 24-bit analog/digital converters (128 dB dynamic range)
DIGITAL INPUT DATA
Supported
input formats
Standard
AES/EBU (AES3) or coaxial S/PDIF (IEC 60958 Type II)
Sampling frequency (Fs)
44.1, 48, 64, 88.2, 96, 128, 176.4, or 192 kHz
Word length
16, 18, 20 or 24 bits
Input gain
Adjustable from -12 dB to +12 dB by 0.1 dB steps
Latency
3.84 ms (independent of the input sampling frequency)
Sample Rate
Converter (SRC)
Sampling frequency
96 kHz (SRC referenced to the amplified controller internal clock)
Word length
24 bits
Dynamic range
140 dB
Distortion (THD+N)
< -120 dBfs
Bandpass ripple
±0.05 dB (20 Hz-40 kHz, 96 kHz)
Automatic fallback
option
Mode
AB to CD
digital to analog or digital to digital
Switchover conditions
no clock, loss of lock,
CRC error,
bipolar encoding error or data slip
Constant delay
yes (independent of input Fs)
Constant level
yes (upon user setting of AES/EBU in gain, independent of input Fs)
Revert to AES/EBU
manual user selection
PHYSICAL DATA
Dimensions
Weight
11.3 kg / 24.9 lb
Finish
black
Protection rating
IP3x
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