L-Acoustics LA4X User Manual

Technical description
Power supply and amplier section
The LA4X is a green amplied controller that relies on a universal SMPS (Switch Mode Power Supply) suitable for
mains from 100 to 240 V (±10 %). The SMPS features a PFC (Power Factor Correction) which maximizes the amplier
efciency and takes advantage of nearly 100 % of the electrical power available with a very high tolerance to unstable
mains. The PFC allows the LA4X to deliver as much power from a 10 A line as from a 16 A line on a conventional amp.
This represents a reduction of the electrical power requirements (cable gauge, power conditioning, etc.) for substantial
savings.
The Class D amplication circuits ensure the LA4X energy-efciency for minimal heat dissipation. LA4X delivers 4 x
1000WRMS into 8 or 4 Ω with record hold times. Besides the high raw power rating at 8 Ω, the ability to deliver
energy (power x hold time) yields the best performance from loudspeaker systems, especially in LF reproduction.
Speaker outputs
The LA4X features four speakON connectors for loudspeaker outputs.
Speaker protection
The L-DRIVE transducer protection system provides a dual analysis of both signal intensity and voltage in real-time and
RMS. Under extreme conditions, when component membranes reach the over-excursion zone or if the coil temperature
reaches a critical point, L-DRIVE is activated and acts as a power regulator.
As a result, the amount of power delivered at any channel is adjusted to the dynamic and thermal capacity of each
individual transducer.
Monitoring and control
User interface
The front panel user interface provides:
— real-time monitoring functionalities via the LED display (signals presence and level) and the LCD screen (system
parameters)
— instant access to navigation and parameters control using the encoder wheel and the six keys
See also illustration in section Front and rear panels (p.10).
Operating instructions
Refer to section Operation (p.27) for detailed operating instructions.
L-NET remote control network
The integration of the L-NET Ethernet-based network, with its high speed data transfer protocol up to 1 Gbit/s, allows up
to 253 amplied controllers to be controlled and monitored in real-time from LA Network Manager.
Multiple network topologies such as daisy-chain, star and hybrid are congurable. The computer running LA Network
Manager and the amplied controllers are connected to each other using industry standard CAT5e U/FTP cables (or
higher category) tted with RJ45 connectors.
The LA4X connects to the network via the two etherCON sockets located on its rear panel.
Operating instructions
Refer to the LA Network Manager video tutorial for detailed operating instructions.
Third party management solutions
L-Acoustics provides SNMP support to facilitate the integration via third party control and monitoring systems. As
a certied member of the Crestron
®
and Extron
®
partner programs, L-Acoustics also provides software modules
allowing control integration into their automation systems.
Crestron is a trademark or registered trademark of Crestron Electronics, Inc. in the United States, other countries or both.
Extron is a registered trademark of Extron Electronics.
13 LA4X user manual (EN) version 9.1

L-Acoustics LA4X Specifications

General

Brand	L-Acoustics
Model	LA4X
Category	Controller
Language	English