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 4.0 Distribution date: February 6, 2018 © 2018 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.............................9 Technical description............................10 Main features............................10 Internal components........................10 Front and rear panels........................10 Signal processing and amplication......................11 Signal inputs..........................11 DSP architecture..........................12 Power supply and amplier section....................13 Speaker outputs..........................
  • Page 4 Operation................................ 28 Powering on............................28 Powering off............................28 Setting to standby mode..........................29 Interpreting the front panel LEDs.......................29 STATUS............................29 L-NET............................29 Meters............................30 OUT.............................30 Main screen description.......................... 31 Using quick access functions........................32 Locking/Unlocking the front panel....................32 Muting/Unmuting an output channel....................32 Modifying gain..........................
  • Page 5 D/R - side bracket........................70 D/R - rear bracket........................71 D/R - rear bracket support screws....................72 D/R - front handle.........................73 D/R - encoder wheel knob......................74 Quality control............................75 CHK - External structure and foam lter...................75 CHK - Cleanness...........................75 CHK - Normal start-up sequence....................75 CHK - Network functionalities and rmware..................

  • 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 4.0...

  • 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

    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 9: System Components

    Refer to the user manuals of the loudspeaker systems for detailed instructions about the enclosures and their connection to the amplied controllers. Powering and driving system Racks LA-RAK II Touring rack containing three LA12X, LA-POWER II for power distribution and LA-PANEL II for audio and network distribution L-CASE 2U Electronics transport and protection case Loudspeaker cables Refer to the user manuals of the loudspeaker systems for detailed instructions about the enclosures and their connection to the amplied controllers.

  • Page 10: 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 11: Signal Processing And AmpliCation

    1 Gb/s Ethernet ports. Analog 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.10).

  • Page 12: Dsp Architecture

    Technical description One AVB stream of up to 16 channels may be connected to LA12X. LA12X 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 stream format with stream frequencies of 48 or 96 kHz.

  • Page 13: 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 14: 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 15: 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 16: 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 17: 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 18: 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 connector on the rear panel are for loudspeaker connection. They...
  • Page 19 (2 channels) not used input mode CD IN C / IN C&D IN D Analog analog audio source (1 channel) analog audio source (1 channel) AES/EBU digital audio source (2 channels) not used LA12X user manual (EN) version 4.0...
  • Page 20 L-NET panel The two etherCON connectors are for the remote control of 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 21: Analog Audio

    In an analog daisy-chain, LA4 and LA8 with power off or in standby cause sound distortion at high input levels to the other amplied controllers they are connected to. Make sure all Units are powered on and in operating (not in standby) mode, or disconnect them from the daisy- chain. LA12X user manual (EN) version 4.0...

  • Page 22: Digital Audio

    In case of transmission losses, try to reduce the sampling frequency of the digital audio source. Moreover, as a general rule, avoid using sources rated beyond 96 kHz, as the maximum possible cable length is reduced, while the additional information is cancelled by SRC to 96 kHz. LA12X user manual (EN) version 4.0...

  • Page 23: L-Net

    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 Help for network setup. To connect LA12X to an AVB network or use LA12X to create an AVB network, use the etherCON connectors on the rear panel.
  • Page 24 CH(1) (OUT1) SP-Y1 CC4FP CH(2) (OUT2) OUT3/OUT4 OUT1/OUT2 same as OUT1/OUT2 DO and DOSUB-LA8 on CA-COM output SPK1 (OUT1) CA-COM SPK2 (OUT2) SPK3 (OUT3) SPK4 (OUT4) Connecting 3-way active enclosures DO on CA-COM output CA-COM LA12X user manual (EN) version 4.0...
  • Page 25 OUT1/OUT2 SP and SP-Y1 on speakON output CH(1) (OUT1) SP-Y1 CC4FP CH(2) (OUT2) OUT3/OUT4 OUT1/OUT2 same as OUT1/OUT2 DO and DOFILL-LA8 on CA-COM output Autoconnect 2W CH(A) (OUT1/OUT2) CA-COM 2W CH(B) (OUT3/OUT4) LA12X user manual (EN) version 4.0...
  • Page 26 Installation Connecting a hybrid conguration with subwoofers Refer to the Syva user manual for more information. DO and DO3WFILL on CA-COM output SUB1 (OUT1) SUB2 (OUT2) (custom adapter) CA-COM Autoconnect 2WAY (OUT3/4) LA12X user manual (EN) version 4.0...
  • Page 27 Enclosure drive capacity per LA12X Make sure the total number of connected enclosures does not exceed the maximum number of enclosures per controller. LA12X can drive up to two Syva Low per output, but no more than six per controller. coaxial enclosures...

  • Page 28: Operation

    The LCD screen and LEDs turn off. The POWER LED is lit in red to indicate that the controller is not disconnected from mains. The amplied controller is no longer detected over the network, but it still transmits Ethernet data in daisy-chains. LA12X user manual (EN) version 4.0...

  • Page 29: 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.61)

  • Page 30: Meters

    LOAD green: a load is connected and the output module delivers a minimum of 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 4.0...

  • Page 31: 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 4.0...

  • Page 32: 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 4.0...

  • Page 33: 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 4.0...

  • Page 34: 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 4.0...

  • Page 35: Using The Main Menu

    A page is selected when it is displayed on the top 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 4.0...

  • Page 36: Load Preset

    1 to 10 (read and write) User presets stored by user — refer to STORE PRESET (p.38) 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 Help) LA12X user manual (EN) version 4.0...
  • Page 37 L-NET network. Press the ESC key twice to cancel. LA12X user manual (EN) version 4.0...

  • Page 38: Store Preset

    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 4.0...

  • Page 39: Delete Preset

    The parameters of the currently loaded preset can be set individually for each output channel or channel set. Channel set In certain presets, some channels are interdependent and form a channel set. Within a channel set the preset parameters are common to all channels. LA12X user manual (EN) version 4.0...
  • Page 40 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.38). LA12X user manual (EN) version 4.0...

  • Page 41: 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 42: Input Settings

    ‼※ ABCD INPUT SOURCE LA12X amplied controllers can retrieve four channels from an AVB stream containing up to 16 channels, at 48 kHz or 96 kHz, connected by one of the two 1 Gb/s Ethernet ports. Use ABCD INPUT SOURCE to select between XLR or AVB input sources for all channels.
  • Page 43 WAITING DATA LOCKED 96k ‾ABCD INPUT SOURCE ‼※ ‾ABCD INPUT SOURCE ‼※ FBACK XLR WAITING DATA FBACK XLR LOCKING ‾ABCD INPUT SOURCE ‼※ ‾ABCD INPUT SOURCE ‼※ FBACK XLR WAITING RSV FBACK READY 96k LA12X user manual (EN) version 4.0...
  • Page 44 XLR AB INPUT MODE ‽XLR AB INPUT MODE ‼※ ANALOG >ANALOG< AES/EBU LOCK 44k1 + OK ‽XLR CD INPUT MODE ‼※ XLR CD INPUT MODE ‽XLR CD INPUT MODE ‼※ ANALOG >ANALOG< AES/EBU LOCK 44k1 LA12X user manual (EN) version 4.0...
  • Page 45 2. Turn the encoder wheel to select the input mode. 3. Press the OK key or the encoder wheel to validate. AVB FALLBACK MODE Sound cuts in case of failure of the AVB input source can be avoided with the AVB fallback option. LA12X user manual (EN) version 4.0...
  • Page 46 4. Press the OK key or the encoder wheel to validate. 5. Turn the encoder wheel to select the setting (ON or AVB > XLR). 6. Press the OK key or the encoder wheel to validate. LA12X user manual (EN) version 4.0...
  • Page 47 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 4.0...
  • Page 48 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 4.0...
  • Page 49 Operation AVB STREAM MAPPING LA12X amplied controllers can retrieve four channels from an AVB stream containing up to 16 channels. Use AVB STREAM MAPPING to select the channel numbers to be retrieved for each input channel. ‽AVB STREAM MAPPING ‼※...

  • Page 50: Monitoring & Info

    ‽ETHERNET LINKS ‼ 1: 1G FULL 2:100 FULL ‽AVB CLOCK STATUS ‼ DISABLED ‽FIRMWARE ‼ V2.8.1 ‽PRESET LIBRARY ‼ V5.8 ‽MAC ADDRESS ‼ 00:1B:92:01:90:3A ‽HARDWARE INFO ‼ ‿ENCLOSURE CHECK ‼ PRESS OK TO START LA12X user manual (EN) version 4.0...
  • Page 51 ‼ 1: 1G FULL 2:100 FULL For example, in this illustration, port 1 has a speed of 1 Gbits/s, port 2 has a speed of 100 Mbits/s, and both are in full- duplex mode. LA12X user manual (EN) version 4.0...
  • Page 52 V2.8.1 V2.8.1.4 Network Always ensure that all LA12X amplied controllers used in a given network run the same rmware version. PRESET LIBRARY PRESET LIBRARY displays the version number of the amplied controller onboard preset library. Press the encoder wheel to display the third digit.

  • Page 53: Options

    Operation 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. ‽HARDWARE INFO ‼ For example, in this illustration, the hardware has ID5.
  • Page 54 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. LA12X user manual (EN) version 4.0...
  • Page 55 3. Turn the encoder wheel to select SCREEN CONTRAST. 4. Press the OK key or the encoder wheel to validate. 5. Turn the encoder wheel to select the value. 6. Press the OK key or the encoder wheel to validate. LA12X user manual (EN) version 4.0...
  • Page 56 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 4.0...

  • Page 57: Settings Protection

    • Enter the 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 4.0...

  • Page 58: Maintenance

    Insufcient upkeep of the product can void the warranty. Equipment and tools Equipment • computer with LA Network Manager version 2.4.3 minimum and CAT5e U/FTP cable Tools Name Reference Distributor Set of 6-point 1/4'' sockets R.360NANO FACOM Torque screwdriver air blower LA12X user manual (EN) version 4.0...

  • Page 59: Screws Repair Kit

    Maintenance Screws repair kit This repair kit contains spares to replace lost or damaged screws while performing maintenance operations on LA12X. G03286 KR spare external fasteners LA12X ×5 ×5 ×5 ×5 DIN7991 M4X10 DIN912 M4X6 ISO14581 M4X8 CHA162 RESUP1 M4×10 hex M4×6 hex...

  • Page 60: L-Net Network Issues

    Replace any damaged CAT5e U/FTP cable 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 4.0...

  • Page 61: 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.51).
  • Page 62 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 4.0...
  • Page 63 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 64 X12 or X15 HiQ. The output channel is muted to avoid a potential risk of physical harm and further damages to the product. Verify the connected loudspeaker enclosures. Disconnect or replace the faulty enclosure, then unmute the output channel. LA12X user manual (EN) version 4.0...
  • Page 65 (refer to the third-party documentations) or the gain value on the channel. Check that nothing causes a short-circuit at the output loudspeaker impedance too low (incorrect cabling scheme, damaged cable or short-circuit in the speaker voice coil). LA12X user manual (EN) version 4.0...

  • Page 66: Sound Issues

    Replace the loudspeaker cable. loudspeaker is damaged If only one loudspeaker is connected, inspect it. other causes Contact L-Acoustics. LA12X user manual (EN) version 4.0...
  • Page 67 Contact 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 4.0...

  • Page 68: Exploded View

    In the exploded view, each assembly corresponds to a D/R procedure and the necessary repair kit(s). Spare screws and fasteners Assemblies indicated by a ◊: order G03286 (KR spare external fasteners LA12X ) for spares Exploded view - external modules...

  • Page 69: Disassembly And Reassembly Procedures

    KR grill LA4X / LA12X ×1 ×1 MC LA4XGRL CM LA4X LA4X and LA12X grill LA4X and LA12X foam lter Exploded view To clean the foam lter, use mild dishwashing detergent or soap then dry it. LA12X user manual (EN) version 4.0...

  • Page 70: D/R - Side Bracket

    KR front bracket LA12X KR spare external fasteners LA12X Kit 1 blue thread sealant ×1 ×5 ×1 17721 ISO14581 M4X8 FT247 LA12X side bracket M4×8 Torx blue thread locker (25 g) Exploded view 3 N.m LA12X user manual (EN) version 4.0...

  • Page 71: D/R - Rear Bracket

    Maintenance D/R - rear bracket Repair kits KR LABRACKET Kit rear brackets LA4/LA4X/LA8/LA12X ×2 MC LA4XEQAR amplied controller rear bracket Kit contains additional components that are not required for this procedure. Exploded view LA12X user manual (EN) version 4.0...

  • Page 72: D/R - Rear Bracket Support Screws

    • 2.5 mm hex bit Repair kits G03286 KR spare external fasteners LA12X ×5 ×5 ×5 DIN7991 M4X10 DIN912 M4X6 CHA162 RESUP1 M4×10 hex M4×6 hex support disk Exploded view 1 N.m 2.5 mm 1 N.m 3 mm LA12X user manual (EN) version 4.0...

  • Page 73: D/R - Front Handle

    MM LAXPOIG CV TF3512IP amplied controller front handle M3.5×12 Torx Prerequisite Side brackets disassembled. side bracket (p.70). Exploded view 1 N.m CV TF3512IP are self-drilling screws. For safety reasons, always reassemble new front handles. LA12X user manual (EN) version 4.0...

  • Page 74: D/R - Encoder Wheel Knob

    D/R - encoder wheel knob Repair kits KR LA4XBOUT KR encoding wheel button LA4X/LA12X ×1 MM LA4XBOUT LA4X and LA12X encoder wheel knob Kit contains additional components that are not required for this procedure. Exploded view LA12X user manual (EN) version 4.0...

  • Page 75: Quality Control

    3. Check that the amplied controller is detected as an online Unit. Refer to the LA Network Manager video tutorial. 4. Check that all LA12X in the system run the same version of the rmware, and that it matches with the version of LA Network Manager in use.

  • Page 76: Glossary

    (bare lead version of the power cable) repair kit newton meter, international torque unit, 1 N.m = 9 in lbf SMPS Switched Mode Power Supply (power supply inside of the amplied controller) United States LA12X user manual (EN) version 4.0...

  • Page 77: 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 (0º C / 32º F to +50º C / 122º F) LA12X user manual (EN) version 4.0...

  • Page 78: 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 4.0...

  • Page 79: Analog Input

    IEC 61883-6 AM824 at 48 kHz or 96 kHz Channel count 1 to 16 Clock synchronized on clock of the connected AVB input stream (upsampling at 96 kHz in case of stream at 48 kHz) LA12X user manual (EN) version 4.0...

  • Page 80: Automatic Fallback Option

    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 4.0...

  • Page 81: Approvals

    Approvals Approvals LA12X user manual (EN) version 4.0...
  • Page 82 Approvals The LA12X amplied controller is certied with the following: S&E LA12X user manual (EN) version 4.0...
  • Page 83 L-Acoustics, an L-Group Company 13 rue Levacher Cintrat - 91460 Marcoussis - France +33 1 69 63 69 63 - info@l-acoustics.com www.l-acoustics.com L-Acoustics GmbH L-Acoustics Ltd. L-Acoustics Inc. Steiermärker Str. 3-5 PO. Box Adler Shine - Aston House 2645 Townsgate Road, Suite 600...

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