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L-Acoustics LA 8 User Manual

L-Acoustics LA 8
68 pages
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LA8
user manual (EN)

Table of Contents

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L-Acoustics LA 8 Specifications

General IconGeneral
Amplifier TechnologyClass D
Number of Channels8
Input TypeAnalog, AES/EBU
Weight13.9 kg
DSPYes
Connectors (Inputs)XLR, AES/EBU
Input ConnectorsXLR, AES/EBU
Frequency Response20 Hz - 20 kHz
Signal to Noise Ratio> 100 dB
THD+N< 0.1%
Total Harmonic Distortion< 0.1%
Operating Voltage100-240 V AC
Dimensions (H x W x D)3.5 x 19 x 15.7 in
Connectors (Outputs)Speakon NL4
Output ConnectorsSpeakon NL4
CoolingForced air

Summary

Safety

Safety Instructions

General guidelines and warnings for safe operation and installation of the LA8 amplified controller.

Symbols

Explanation of warning symbols used in the manual for hazard identification and compliance.

System Components

Loudspeaker Enclosures

References for user manuals of loudspeaker systems and their connection to controllers.

Powering and Driving System

Components like LA8, LA-RAK, and L-CASE for system power, control, and transport.

Loudspeaker Cables

References for detailed instructions on loudspeaker system cabling.

Software Applications

Information on LA Network Manager software for remote control and monitoring.

Technical Description

Internal Components

Overview of the LA8's core DSP, memory, converters, power supply, and interfaces.

Front and Rear Panels

Detailed identification and description of all connectors, controls, and indicators on the unit.

Signal Processing and Amplification

Explanation of analog and AES/EBU digital audio inputs and their signal processing.

DSP Architecture

How proprietary algorithms and filters ensure performance and transducer protection.

Power Supply and Amplifier Section

Details on Class D technology, auto-sensing SMPS, and output power capabilities.

Monitoring and Control

Information on the front panel user interface and L-NET remote control network.

Installation

Mounting

Instructions for rack-mounting the LA8 unit, including dimensions and transport support.

Ventilation

Guidelines for maintaining optimal operating temperatures through proper airflow and grill clearance.

Connecting to AC Mains

Electrical specifications, voltage requirements, power data, and circuit breaker advice.

Planning the Power of the Electrical Generator

Considerations for powering the LA8 from a generator, including kVA calculation.

Power Cord

Information on power cord types, plugs, and wiring color codes for safe connection.

Heat Power Calculation

Method to calculate heat power produced by the LA8 based on consumption and output.

Audio and Network Cabling

Details on connecting speakers, audio sources, and network via rear panels.

Speaker Panel

Wiring details for speakON and CA-COM connectors for loudspeaker outputs.

Output Audio Paths

Diagrams illustrating the signal flow from DSP to loudspeaker output connectors.

Signal Panels

Description of XLR connectors for analog and digital audio signal cabling.

L-NET

Information on network setup, cable specifications, and connection topology for remote control.

Speaker

Guidelines on connecting enclosures using speakON or CA-COM connectors, including compatibility.

Operation

Powering On

Step-by-step instructions for turning on the amplified controller and its start-up sequence.

Powering Off

Procedure for shutting down the amplified controller and its shutdown sequence.

Setting to Standby Mode

How to put the controller into standby mode to reduce electrical consumption.

Interpreting the Front Panel LEDs

Explanation of the L-NET LED status indicator on the front panel.

Meters

Description of LED meters for output channel status like CLIP, SIGNAL, and LOAD.

Main Screen Description

Explanation of the elements displayed on the main screen after controller startup.

Using Quick Access Functions

Overview of immediate functions available directly from the main screen.

Locking/Unlocking the Front Panel

Procedure to lock or unlock the front panel controls to prevent accidental changes.

Muting/Unmuting an Output Channel

How to mute or unmute individual output channels using the front panel OUT keys.

Modifying Gain

Steps to adjust the gain for output channels or channel sets using the encoder wheel.

Identifying an Amplified Controller

Method to identify a controller on the L-NET network via the front panel or LA Network Manager.

Displaying Input Level, Input Selection, Input Mode and Group Information

How to view signal levels, input assignments, and group status on the controller.

Using the Main Menu

Navigation through the main menu for accessing functions and submenus.

Load PST

Procedure for loading user or factory presets from the controller's memory.

Store Preset

How to save the current controller settings as a user preset.

Delete Preset

Procedure to delete a user preset from the controller's memory.

Preset Parameters

Setting individual parameters like gain, delay, polarity, and input selection for presets.

Clear Group Params

Removing group parameters assigned via LA Network Manager from the controller.

Input Settings

Configuring input mode, fallback mode, and AES/EBU gain settings.

Fallback Mode

Avoiding sound cuts by enabling automatic switching to analog input on digital failure.

AES/EBU Gain

Adjusting gain for AES/EBU input to align levels for seamless fallback switching.

Monitoring & Info

Viewing real-time measurements, firmware, and controller information.

Options

Accessing general settings like IP address, delay unit, and screen contrast.

Network Address

Setting the IP address for the controller's network communication.

Delay Unit

Selecting the unit for displaying delay values (ms, meters, feet, samples).

Screen Contrast

Adjusting the LCD screen contrast for optimal visibility in different environments.

Reset to Factory Default Settings?

Restoring all controller settings to their factory default values.

Settings Protection

Enabling and bypassing protection for settings using a 4-digit PIN code.

Maintenance

Error Messages

Information on system messages and their corresponding events in LA Network Manager.

Mains Voltage Messages

Handling of under/over-voltage and SMPS status messages related to power supply.

Output Channel External Error Messages

Monitoring and resolution of external errors detected at output channels.

Output Channel Internal Error Messages

Monitoring and resolution of internal errors detected at output channels.

Network Message

Handling of invalid L-NET client connection attempts due to version incompatibility.

Other Messages

Explanation of firmware update errors and temperature-related messages.

Specifications

General

Typical values for output power, voltage, DSP, frequency response, and noise level.

Mains Input Power and Current Draw

Power consumption and current draw data for various operating conditions.

Mains Rating

Voltage and frequency ratings for different LA8 models (LA8, LA8US, LA8JP).

Operating Conditions

Recommended room temperature and internal controller temperature limits.

Protection

Details on circuits, transducers, and fan protection mechanisms used in the LA8.

Interface and Connections

Information on indicators, LCD screen, output connectors, and L-NET ports.

Input Signal Distribution

Specifications for input and link connectors, including analog, digital, and USB.

Analog Input

Input impedance, maximum input level, and A/D conversion details for analog signals.

Digital Input

Supported modes, sampling frequencies, word lengths, and SRC specifications for digital signals.

Latency

Latency values for analog and AES/EBU inputs in standard and low latency modes.

Physical Data

Dimensions, weight, and finish specifications of the LA8 unit.

Approvals

LA8 EC DoC

Declaration of Conformity and applied safety and EMC standards for the LA8.