L-Acoustics LA12X User Manual
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L-Acoustics LA12X User Manual

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Summary of Contents for L-Acoustics LA12X

  • Page 1 LA12X user manual (en)
  • Page 2 Document reference: LA12X user manual (en) version 2.0 Distribution date: October 3, 2016 © 2016 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...

  • Page 3: Table Of Contents

    Contents Safety................................6 Important safety instructions........................6 Additional important safety instructions....................... 7 Symbols..............................8 System components............................10 Technical description............................11 Main features............................11 Internal components........................11 Front and rear panels........................11 Signal processing and amplication......................12 Signal inputs..........................12 DSP architecture..........................13 Power supply and amplier section....................14 Speaker outputs..........................
  • Page 4 Powering off............................30 Setting to standby mode..........................31 Interpreting the front panel LEDs.......................31 STATUS............................31 L-NET............................31 Meters............................32 OUT.............................32 Main screen description.......................... 33 Using quick access functions........................34 Locking/Unlocking the front panel....................34 Muting/Unmuting an output channel....................34 Modifying gain..........................35 Identifying an amplied controller....................35 Displaying input level, input selection, input mode and group information...........
  • Page 5 Latency..............................70 Remote control and monitoring.........................70 Physical data............................70 Approvals................................ 71...

  • Page 6: Safety

    Pour déconnecter complètement l'appareil du secteur, débranchez la prise de la che secteur. 17. The main plug of the power supply cord shall remain readily accessible. La prise principale du cordon d'alimentation doit rester totalement accessible. LA12X user manual (en) version 2.0...

  • Page 7: Additional Important Safety Instructions

    Do not connect the speaker outputs to any other voltage source, such as a battery, power mains, or power supply, regardless of whether the amplied 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.

  • Page 8: Symbols

    This symbol noties 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. LA12X user manual (en) version 2.0...
  • Page 9 EQ correction and delivers a unique sonic signature across all L-Acoustics systems. The LA12X is the most powerful unit in the range. Thanks to its DSP-controlled, universal Switched Mode Power Supply with advanced Power Factor Correction, it delivers high output power with outstanding hold times even on less-than- ideal A/C mains.

  • Page 10: System Components

    System components A complete L-Acoustics system includes loudspeaker enclosures, amplied controllers, cables, rigging system, and software applications. The main components of an L-Acoustics system that includes the LA12X are the following: Loudspeaker enclosures Refer to the user manuals of the loudspeaker systems for detailed instructions about the enclosures and their connection to the amplied controllers.

  • Page 11: Technical Description

    Main features Internal components The core of the LA12X is a dual DSP engine driving four channels of amplication from four inputs. The LA12X also features a ash memory for preset storage and management, high performance A/D-D/A converters and AES/EBU inputs for audio signals, a universal SMPS (Switched Mode Power Supply) with PFC (Power Factor Correction), a front panel user interface, and a 1 Gb/s dual port Ethernet device for networked remote control.

  • Page 12: Signal Processing And AmpliCation

    Analog inputs The LA12X can be fed with up to four balanced analog audio signals using XLR female input connectors ANALOG IN A to ANALOG IN D — see illustration in section Front and rear panels (p.11).

  • Page 13: Dsp Architecture

    — 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 congurations (refer to the Preset Guide) Audio path parameters...

  • Page 14: Power Supply And AmpliEr Section

    Power supply and amplier section The LA12X 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...

  • Page 15: Installation

    Mounting The LA12X is two rack units high (2U) and can be mounted in an EIA-standard 19” rack using the four points on the front panel. Use the xing material provided by the rack manufacturer to mount the controller to the rack front rails.
  • Page 16 Installation Refer to the LA-RAK II user manual. LA12X user manual (en) version 2.0...

  • Page 17: Ventilation

    Installation Ventilation To maintain moderate operating temperatures, the LA12X is equipped with fans providing front to rear airow. Ventilation instructions Install the controller 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.

  • Page 18: Planning The Power Of The Electrical Generator

    A typical generator has a power factor of 0.8 and should operate at 70% load for good efciency. The kVA provision for one LA12X should therefore be: (16 A x 230 V) / (0.8 x 70 %) = 6.5 kVA This calculation is an example using typical values.

  • Page 19: Plugging The AmpliEd Controller

    Heat power calculation If a 4 Ω load is connected to each output channel of the LA12X, each channel delivers up to 2600 W. With a standard use at 1/8 of full power (9 dB headroom), the power delivered per channel is: 2600 / 8 = 325, so a total power of 4 x 325 = 1300 W.

  • Page 20: Audio And Network Cabling

    — an L-NET panel (3) to connect to a network and be remotely controlled by LA Network Manager LA12X audio and network connection panels Speaker panel The two 4-point SpeakON connectors and the 8-point CA-COM connector on the rear panel are for loudspeaker connection.
  • Page 21 (1 channel) analog audio source (1 channel) AES/EBU digital audio source (2 channels) not used Each LINK connector is wired to the corresponding IN connector, and thus transports the same type of signal. LA12X user manual (en) version 2.0...
  • Page 22 L-NET panel The two etherCON connectors are for the remote control of the LA12X over an Ethernet network called L-NET using LA Network Manager. Each of the two etherCON connectors can be equally used as an IN or a LINK connector.

  • Page 23: Analog Audio

    In a daisy-chain layout, the male XLR link connectors LINK A to LINK D feed the input signals to the next amplied controller in the signal chain. Daisy-chaining analog audio IN A IN B IN C IN D LINK A LINK B LA12X user manual (en) version 2.0...

  • Page 24: Digital Audio

    In a daisy-chain layout, the male XLR link connectors LINK A&B and LINK C&D feed the input signals to the next amplied controller in the signal chain. Daisy-chaining digital audio IN A&B IN C&D LINK A&B LA12X user manual (en) version 2.0...

  • Page 25: L-Net

    Ethernet ports of different capabilities, creating detection issues in LA Network Manager. To connect LA12X to L-NET in a daisy-chain, star or hybrid topology, use the etherCON connectors on the L-NET panel. Refer to the LA Network Manager video tutorial for network setup.
  • Page 26 2WAY (OUT3/4) SUB1 (OUT1) CA-COM SUB2 (OUT2) 2WAY (OUT3/4) Connecting 2-way passive enclosures 2-way passive enclosure on speakON output - SP + SP-Y1 CH1 (OUT1) SP-Y1 CC4FP CH2 (OUT2) OUT3/OUT4 OUT1/OUT2 same as OUT1/OUT2 LA12X user manual (en) version 2.0...
  • Page 27 Connect the reversed subwoofer(s) to OUT 1 to use the cardioid preset. Subwoofer on speakON output - SP + SP-Y1 CH1 (OUT1) SP-Y1 CC4FP OUT3/OUT4 OUT1/OUT2 CH2 (OUT2) same as OUT1/OUT2 CH1 (OUT1) SP-Y1 CC4FP OUT1/OUT2 OUT3/OUT4 CH2 (OUT2) same as OUT1/OUT2 LA12X user manual (en) version 2.0...
  • Page 28 Installation Subwoofer on CA-COM output - DO + DOSUB-LA8 SP1 (OUT1) CA-COM SP2 (OUT2) SP3 (OUT3) SP4 (OUT4) SP1 (OUT1) CA-COM SP2 (OUT2) SP3 (OUT3) SP4 (OUT4) LA12X user manual (en) version 2.0...
  • Page 29 X15 HiQ Active 12XT Passive 12XT 115XT HiQ Maximum number of constant curvature WST enclosures per LA12X Loudspeaker enclosure Maximum number of Maximum number of connections per output* enclosures per controller ARCS Wide / ARCS Focus...

  • Page 30: Operation

    Powering off the amplied controller does not disconnect it from mains. Power loss If power is lost, the amplied controller shuts down, but all parameters are restored when the amplied controller switches on again. LA12X user manual (en) version 2.0...

  • Page 31: Setting To Standby Mode

    The STATUS LED on the front panel displays the state of the amplied controller. — green: when the LA12X operates normally — red: during rmware update or when a fault is detected in the LA12X circuitry, indicating a protection system is active. Refer to Error messages (p.60)

  • Page 32: Meters

    0.8 A The four OUT LEDs on the front panel display the mute status. — white: when the corresponding output channel is muted — off: when the corresponding output channel is unmuted LA12X user manual (en) version 2.0...

  • Page 33: Main Screen Description

    D: IN D C+: sum of IN C and IN D (C+D) C-: difference between IN C and IN D (C-D) X: sum of IN A, IN B, IN C and IN D (A+B+C+D) LA12X user manual (en) version 2.0...

  • Page 34: Using Quick Access Functions

    — To mute an output channel: press the corresponding OUT key for less than 0.3 seconds. The screen displays MUTE OUT and the mute status of each output channel for 2 seconds. Example: unmuting OUT1 MUTE OUT Gain can be set before unmuting. LA12X user manual (en) version 2.0...

  • Page 35: Modifying Gain

    On the Workspace of LA Network Manager, the amplied controller blinks in yellow. On the amplied controller, the L-NET and OUT LEDs ashes and the screen displays IDENTIFICATION and the complete IP. IDENTIFICATION 192.168. 1.110 LA12X user manual (en) version 2.0...

  • Page 36: Displaying Input Level, Input Selection, Input Mode And Group Information

    ANALOG signals. Input mode cannot be different between IN A and IN B or between IN C and IN D (3) — Channels OUT1 and OUT2 are assigned to the same set of groups, OUT3 is not assigned to any group, and OUT4 is assigned to group All (4) LA12X user manual (en) version 2.0...

  • Page 37: Using The Main Menu

    A page is selected when it is displayed on the rst line of the screen. 3. Press the OK key or the encoder wheel to enter the page. To return to the main screen, press the ESC key. LA12X user manual (en) version 2.0...

  • Page 38: Load Preset

    1 to 10 (read and write) User presets stored by user — refer to STORE PRESET (p.40) LOAD PRESET FACTORY 11 to 199 (read only) Factory preset library created by L-Acoustics and automatically installed during rmware update (refer to the LA Network Manager video tutorial) LA12X user manual (en) version 2.0...
  • Page 39 L-NET network. Press the ESC key twice to cancel. LA12X user manual (en) version 2.0...

  • Page 40: Store Preset

    Pressing the encoder wheel after the 16th character sets the cursor back to the rst character. 5. Press the OK key to validate the name. The controller displays OVERWRITE?, when the selected memory space is not empty. Press the OK key to overwrite (or the ESC key to cancel). LA12X user manual (en) version 2.0...

  • Page 41: Delete Preset

    Delay is adjustable from 0 to 1000 ms — see also section DELAY UNIT (p.52). Total delay The total delay includes all group delays (set in LA Network Manager) and the output channel delay. Total delay cannot exceed 1000 ms. LA12X user manual (en) version 2.0...
  • Page 42 7. Repeat steps 2 to 5 for each preset parameters. Preset parameter modications apply immediately. Saving preset parameters Preset parameter modications are not automatically saved and are lost if the preset is reloaded. Refer to STORE PRESET (p.40). LA12X user manual (en) version 2.0...

  • Page 43: Clear Group Params

    LA Network Manager (in standalone mode), and when the amplied controller is shut down or restarted. Group parameters are not preset-dependent and remain active when a different preset is loaded. Therefore, L-Acoustics recommends to clear group parameters when an amplied controller is used in standalone mode after being used within a network.

  • Page 44: Input Settings

    5. Turn the encoder wheel to select between the input modes (ANALOG for analog audio source, AES/EBU for digital audio source). 6. Press the OK key or the encoder wheel to validate. 7. Repeat steps 3 to 6 for the other channel pair. LA12X user manual (en) version 2.0...
  • Page 45 LOCK 44k1 Procedure 1. From the INPUT MODE AB menu, press the OK key. 2. Turn the encoder wheel to select the input mode. 3. Press the OK key or the encoder wheel to validate. LA12X user manual (en) version 2.0...
  • Page 46 4. Press the OK key or the encoder wheel to validate. 5. Turn the encoder wheel to select the setting (ON or OFF). 6. Press the OK key or the encoder wheel to validate. LA12X user manual (en) version 2.0...
  • Page 47 5. Turn the encoder wheel to select an input value. Setting applies in real-time. Turn the encoder wheel for steps of 0.1 dB. Press and turn the encoder wheel for steps of 1 dB. 6. Release the key. LA12X user manual (en) version 2.0...

  • Page 48: Monitoring & Info

    In illustration MONITORING & INFO (p.48), the RMS voltage of channels OUT 1 to OUT 4 is respectively 12, 10, 13, and 11 % of the maximum values. LA12X user manual (en) version 2.0...
  • Page 49 Press the encoder wheel to display the fourth digit and the build date (in the YYYYMMDD format). ‽FIRMWARE ‼ ‽FIRMWARE 20160217 V1.7.0 V1.7.0.8 Network Always ensure that all LA12X amplied controllers used in a given network run the same rmware version. LA12X user manual (en) version 2.0...
  • Page 50 (p.48), the MAC address is 00:1B:92:01:90:3A. HARDWARE INFO HARDWARE INFO displays the version of the hardware in use in the amplied controller. For troubleshooting purposes, it can be useful to communicate this number to the L-Acoustics representative. In illustration MONITORING & INFO (p.48), the hardware has ID5.

  • Page 51: Options

    4 bytes. In class C private local area IP subnets, the three rst bytes are the network prex and the last byte is the device identier on the subnet. Regarding device identiers, two numbers are reserved: 0 to designate the subnet, and 255 to communicate with all devices of the subnet (the IP broadcast address). LA12X user manual (en) version 2.0...
  • Page 52 Turn the encoder wheel to select a value. c) Press the OK key to validate. d) In LA Network Manager: 1. Click the L-Acoustics logo and select Options. 2. Enter the corresponding values in IP Range to scan for L-NET. DELAY UNIT Delay values can be displayed in ms (milliseconds), meters, feet or samples.
  • Page 53 4. Press the OK key or the encoder wheel to validate. 5. Turn the encoder wheel to select the value (OFF, LOW, MEDIUM, NORMAL or SUNLIGHT. 6. Press the OK key or the encoder wheel to validate. LA12X user manual (en) version 2.0...
  • Page 54 The amplied controller displays RESET AMP TO FACTORY, ARE YOU SURE?. 5. Press the OK key or the encoder wheel to validate (or the ESC key to cancel). The amplied controller launches the start-up sequence. When complete, the amplied controller displays the main screen. LA12X user manual (en) version 2.0...

  • Page 55: Settings Protection

    PIN code to temporarily bypass the protection or press the ESC key to cancel ACCESS ENTER PIN: LOCKED Entering a PIN code ENTER PIN: OUT1 + ENTER PIN: OUT2 + ENTER PIN: OUT3 + ENTER PIN: OUT4 + ENTER PIN: LA12X user manual (en) version 2.0...
  • Page 56 5. Press the OK key or the encoder wheel to validate. If the controller returns to the ENTER PIN screen, the entered PIN code is wrong. Repeat step 1 to 5 with the right PIN code, or press the ESC key to cancel. LA12X user manual (en) version 2.0...

  • Page 57: Maintenance

    This section contains the diagnosis tables and procedures to identify the issues and how to address them. Exploded view (p.66) This illustration gives an overview of the order in which the elements must be disassembled and reassembled. Each assembly refers to the corresponding D/R procedure and the necessary repair kit(s). LA12X user manual (en) version 2.0...

  • Page 58: Troubleshooting And Diagnosis

    — contact L-Acoustics the L-NET LED does not work when online (refer to the LA Network Manager video tutorial) — contact L-Acoustics amplied controller does not power on (power LED is always red) — contact L-Acoustics LA12X user manual (en) version 2.0...

  • Page 59: L-Net Network Issues

    CAT5e U/FTP cables in the network L-NET cable is damaged chain more than two software clients are already connected to disconnect all other software clients the amplied controller rmware failure restart the amplied controller other causes contact L-Acoustics LA12X user manual (en) version 2.0...

  • Page 60: Error Messages

    LA12X is equipped with a universal SMPS (Switched Mode Power Supply) compatible with mains input nominal voltages of 100 V / 240 V ±10 %. The mains connected to LA12X is monitored for under and over-voltage, refer to section MAINS VOLTAGE (V) (p.49).
  • Page 61 Channel muted 2 seconds. Check the loudspeaker cables and connectors, including link cables. If the error persists after disconnecting all cables and rebooting, the controller must be sent to an L-Acoustics representative for maintenance. LA12X user manual (en) version 2.0...
  • Page 62 CC on channel # Channel disabled SMPS initiates an emergency shut down for safety. Reboot is required. If the error persists after disconnecting all cables and rebooting, the controller must be sent to an L-Acoustics representative for maintenance. Network message Displayed if the amplied controller detects a connection attempt from a version of LA...
  • Page 63 (incorrect cabling scheme, damaged cable or short-circuit in the speaker voice coil). LA12X user manual (en) version 2.0...

  • Page 64: Sound Issues

    L-Acoustics LA12X user manual (en) version 2.0...
  • Page 65 L-Acoustics sound only available in one input mode and not the other sound only available in AES/EBU and not in analog, or sound only available in analog and not in AES/EBU — contact L-Acoustics LA12X user manual (en) version 2.0...

  • Page 66: Exploded View

    In order to operate, follow the order outlined here. Each assembly refers to the corresponding D/R procedure and the necessary repair kit(s). Screws and fasteners Assemblies indicated by a ◊: order G03286 KR external fasteners LA12X Exploded view - external modules rear bracket...

  • Page 67: SpeciCations

    100 V - 240 V ~ ±10%, 50-60 Hz nominal current requirements 30 A for 100-120 V, 16 A for 200-240 V operating conditions temperature room temperature (from 0º C / 32º F to +50º C / 122º F) LA12X user manual (en) version 2.0...

  • Page 68: Input Signal Distribution

    IN A&B / IN C, IN D (3 connectors, 4 channels) digital AB / digital CD IN A&B / IN C&D (2 connectors, 4 channels) link connectors analog input mode passively connected digital input mode electronically buffered, failsafe relay LA12X user manual (en) version 2.0...

  • Page 69: Analog Input

    Fs constant level upon user setting of AES/EBU gain, independent of input revert to AES/EBU upon manual user selection input gain range -12 dB to +12 dB steps 0.1 dB LA12X user manual (en) version 2.0...
  • Page 70 465 mm / 18.3 in LA12X LIMIT/CLIP -5dB STATUS L-NET -10dB -20dB SIGNAL LOAD LA12X MENU POWER OUT 1 OUT 2 OUT 3 OUT 4 INPUTS A ~ D 433 mm / 17.04 in LA12X user manual (en) version 2.0...
  • Page 71 Approvals Approvals LA12X user manual (en) version 2.0...

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