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LA4X Amplified Controller

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1. 24 4 3 1 24 4 3 2 Melu Jie E E E E A A 27 4 3 3 ACCESS TIPDES PEO UE 28 4 4 Ee bii M 29 MS O O 30 DELETE PRE i i aa aa a aaa aa aa aia aiamaa ee ere ee 31 47 FBESETFARAMIETERS 32 48 KLEAR GROUF PARAPIS E 33 4 9 Js EIE INED esi PEA 34 4 9 1 TODE aaa amm 34 4 9 2 FALLES CEPDE PE 35 4 9 3 la OA CT M HP 36 ermeucevBh ije 37 ce 38 4102 So ae eer E E ee PHP 38 uox ARYA ce M 38 MNO PRESET LIBRARY 38 Gr BRlclco LE M M 38 OPEN re M 39 AILL NEPWORK ADDRES S c 40 DECAT ON 40 213 e c2 ESO IIS irie 41 MODE eee ala ee A P bu M dE 41 4115 RESET TO FACTORY D
2. 1 3 2 Loudspeaker enclosures and nnne entente nennen sten 1 3 3 AU EE TETTE TTE TOSS 1 3 4 SOR WAN LA4X AMPLIFIED CONTROLLER E EA mt 2 1 1 IPS al psa IE IET TT 2 1 2 PORE MATSI ET EE ECC EE T CO EE Signal processing and ente reete testen trees 2 2 1 Se 1 E TE Em 2 2 2 MEE D QT TTE 2 2 3 Power supply amplifier SOCT OM Jovi ve qux bua tus ikka 2 2 4 Speaker OHEDULS gt 2 3 1 Bldg 2 3 2 L NET remote control MetWOIK rvissatmsnv taamal INSTALLATION Melia cone E E NY IRIE AION aig gee TE DEL Comec me E alatasa 3 3 1 AC Hans SPO CIICALIONS m TU patema a S R 3 3 2 AE SE PHASE Cll CUIC E E o LU OE DLE 3 3 3 GIP CUE ES AKER a ama aa a aaa 3 3 4 BICC LT ICAI SE 1 TEE
3. 3 3 5 POWER CON Cis cin 3 3 6 OTS UO tenants 3 9 7 Example of heat power Audio and NetWork cabling cetiweranedesredsinacuveeciscainsteabeceanodedasdisinadetasduasnaneosauedaaedcenbodandecasepctnsrdesenmtagiunsehdveciseadenaesavapanedede 3 4 OSIM SAN E MMC Tc 3 4 2 Anal98 SIGNAL CODD A nede 3 4 3 Digital SIGNAL SCAB MINTS maalida aastate k limees 3 4 4 ER CADIS AE aaa ala aia MIU alaalia isad 3 4 5 LEINE TE eae OPERATION Powering on powering off selecting the standby mode 0venevenenenenene vene een een nee enen een enen een een een eee nee LA4X LM EN 4 0 WWW L AGOUSTICS COM 5 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 4 2 D 22 4 2 Malisereei TTE PPP cS 22 4 2 2 LED NEUE UD EU mtm 23 4 2 3 SEA KUS and qM ER 23 4 2 4 eV ne 23 4 3 WISER eE
4. cabling The LA4X can be remote controlled over an Ethernet network called L NET using LA NETWORK MANAGER software refer to the LA NETWORK MANAGER video tutorial To connect the LA4X to L NET use the EtherCON connectors on the L NET panel see Figure 7 Each of the two EtherCON connectors can be equally used as an IN or LINK connector Refer to the LA NETWORK MANAGER video tutorial for network setup type of cables physical connections network topology etc LA4X_UM_EN 4 0 WWW L AGUOUSTIGS GUM 20 4 OPERATION 41 Powering on powering off selecting the standby mode gt Press the POWER key for one second to power on the controller see Figure 11 The controller goes through a 6 second start up sequence coming with Initializing Controller displayed on the LCD screen The POWER LED turns off and then is lit in orange The controller is ready for use when the main screen is displayed and the POWER LED is lit in green see section 4 2 1 STATUS POWER LED POWER key z ESC OK INPUTS A D Figure 11 Start up sequence Press the POWER key for one second to power off the controller The LCD screen and all LED turn off except the POWER LED which turns red to indicate that the controller is not disconnected from mains see Figure 2 Although it cannot be detected anymore over the network the controller still transmits Ethernet data in a daisy chain topology STATUS LA4X ESC INPUTS
5. 0 Figure 12 LA4X turned off n Power loss If the power has been lost the controller will shut down but all parameters will be restored to same state as before shutting down when the controller switches on again Disconnection from mains Powering off the controller does not disconnect it from mains Standby mode 1 reduce electrical consumption and lock the front panel interface the controller can be put in standby mode from LA NETWORK MANAGER refer to the LA NETWORK MANAGER video tutorial While the controller is in standby mode Standby Mode is displayed on the LCD screen and the POWER LED is lit in orange It is possible to cancel the standby mode from LA NETWORK MANAGER or from the controller front panel interface gt push and hold the encoder wheel for one second LA4X EN 4 0 WWW L ACOUSTIC S C OM 21 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 4 2 Display 4 2 1 Once the start up sequence has cycled see section 4 1 the POWER LED is lit green and the LCD displays the main screen shown in Figure 3 STATUS LA4X 34 OK INPUTS D Figure 13 Main screen Preset memory number 001 to 255 Memory space containing the current preset The preset can be a user preset or come from an on board preset library see section 4 4 2 Preset name Copied from a preset library or entered by the user if prior stored as a user preset 3 La
6. 2 3 for 100 V 1 9 for 120 V 1 15 for 200 V channels Model universal SMPS Switched Mode Power Supply Power supply Power Factor yes Correction PFC cos gt 0 9 4 full power Mains ratings 100 240 V 10 96 50 60 Hz Operating temperature Room temperature from 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 A At minimum speed 20 dBA Fans noise free field m Ara mumissedd 45 dBA POWER LED 4 mute LED Indicators STATUS LED Output Connectors L NET connectors LA4X LM EN 4 0 L NET presence LED For each output LOAD LED signal and LIMIT CLIP level OUTI to OUT4 ax point speakON di OUR and OT 2 x Fast Ethernet EtherCON WWW L AGUOUSTIGS GUM 44 INPUT SIGNAL DISTRIBUTION Conmeenre Input 4 Neutrik female XLR3 IEC 268 ESD protected Link 4 Neutrik male XLR3 IEC 268 ESD protected Analog AB Analog CD IN A IN B IN C IN D 4 connectors 4 channels Analog AB Digital CD IN A IN B IN C amp D 3 connectors 4 channels Digital AB Analog CD IN A amp B IN C IN D 3 connectors 4 channels Available input connectors vs input mode Digital AB Digital CD IN A amp B IN C amp D 2 connectors 4 channels Analog input mode passively connected Digital input mode electronically buffered failsafe rela
7. LAAX AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 WWW L ACOUSTICS COM LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 IMPORTANT SAFETY INSTRUCTIONS CAUTION Explanation of Graphical Symbols A RISK OF ELECTRIC SHOCK The lightning flash with arrowhead symbol within DO NOT OPEN equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage WARNING TO REDUCE THE RISK OF FIRE within the product s enclosure that may be of OR ELECTRIC SHOCK DO NOT EXPOSE sufficient magnitude to constitute a risk of electric THIS APPLIANCE TO RAIN OR MOISTURE SHOCK AD 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 Read these instructions 2 3 4 5 6 7 8 Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with dry cloth Do not block any ventilation openings Install in accordance with the manufacturer s instructions 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 provid
8. The input impedance is high enough 22 kQ balanced to allow multiple parallel input connections nm Balanced cables Symmetrical balanced shielded cables are highly recommended as balanced signals are less sensitive to AC hum and radio interference Unbalanced lines may add noise especially over long cable runs IN A INC IN D analog audio source Figure 8 Daisy chaining analog audio LA4X EN 4 0 WWW L ACDOLSTICS GOM 17 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 3 4 3 Digital SIGNAL cabling The four AES EBU XLR3 connectors on the SIGNAL panel see Figure 7 are transformer balanced and wired according to IEC 268 The two female XLR3 input connectors AES EBU IN A amp B and AES EBU IN C amp D can receive up to four digital signals when setting the AES EBU input mode for channel pairs AB and CD The input format is AES EBU AES3 or coaxial S PDIF IEC 60958 Type Il In a daisy chain layout the two male XLR3 link connectors LINK A amp B and LINK C amp D feed the input signals to the next amplified controller in the signal chain see Figure 9 Each LINK connector is electronically buffered to allow daisy chaining any number of amplified controllers It also features a failsafe relay to ensure wiring continuity in case of amplified controller shutdown Cables for AES EBU digital audio The quality required for the XLR cables will depend on the cable length and the signal sampling frequency
9. 40 ft at 20 C Refer to section 4 11 2 for setting the delay unit Value setting resolution P Turn the encoder wheel to obtain fine resolution last digit P Press and turn the encoder wheel to obtain coarse resolution second to last digit nm Total delay The total delay is the sum of the group delays set in LA NETWORK MANAGER and the output channel delay The total delay cannot exceed 1000 ms n Preset parameters saving Preset parameter modifications apply immediately but are not automatically saved to the current preset they will be lost if the preset is reloaded Use the STORE PRESET function to save the current preset with its settings to a user memory see section 4 5 4 8 CLEAR GROUP PARAMS The group parameters names gains delays and contour EQs defined in LA NETWORK MANAGER refer to the LA NETWORK MANAGER video tutorial can be cleared Group and preset parameters 1 The group parameters apply to a set of amplified controllers that are part of groups while the preset parameters apply to a single amplified controller refer to section 4 7 The CLEAR GROUP PARAMS function only clears the group parameters and does not clear the preset parameters To clear the group parameters follow these steps see also Figure 31 From the main menu select CLEAR GROUP PARAMS 2 Press the OK key or the encoder wheel or ESC to abort If the controller displays L NET ACTIVE CANNOT CLEAR it means that the operati
10. and turn the encoder wheel to obtain a 0 step resolution 4 Press the OK key to validate the setting or ESC to abort For example in Figure 39 the IP address has been modified from 192 168 1 110 to 192 168 1 123 nm Subnet modification According to the network administration requirements the default subnet 192 168 1 0 can be modified entering new values for the three first bytes as follows Long click on the key located just below the number to modify until it is selected 2 Turn the encoder wheel to select a new value and press the OK key to validate 3 Repeat the procedure for all numbers to modify 4 11 2 DELAY UNIT Delay values can be displayed in ms milliseconds SAMPLES METERS or FEET The values in meters or feet are given for a temperature of 20 C To select the delay unit follow these steps From main menu select OPTIONS and press the OK key or the encoder wheel or ESC to abort 2 Turn the encoder wheel to select DELAY UNIT 3 Press the OK key or the encoder wheel to enter the page or ESC to abort 4 Turn the encoder wheel to select the chosen setting 5 Press the OK key or the encoder wheel to validate the setting or ESC to abort For example in Figure 39 the delay unit has been modified from ms to METERS LA4X UM EN 4 0 WWW L AGOUSTIGS GOM 40 4 11 3 SCREEN CONTRAST To set the LCD screen contrast follow these steps From the main menu select OPTIONS and press the O
11. connectors 15 EtherCON L NET network connectors navigation edition encoder wheel de e power standby key and LED LA4X UM EN 4 0 WWW L ACOUSTIC S C OM 9 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 2 2 Signal processing and amplification 2 2 Signal inputs The LA4X features four input connectors allowing it to receive four analog signals four digital signals or two analog and two digital signals depending on the input mode selected by the user see section 3 4 1 This architecture also allows digital to analog or digital to digital fallback Analog inputs The LA4X can be fed with up to four balanced analog audio signals using XLR3 female input connectors ANALOG IN A to ANALOG IN D see Figure 2 Each analog input port is ESD protected The analog input panel also features four XLR3 male link connectors passively wired to the input connectors They allow transmitting the input signals to daisy chained amplified controllers Each analog link port is ESD protected To be processed by the DSP the analog signal must be converted into a digital signal For this purpose the LA4X amplified controller is fitted with four cascaded 24 bit A D converters with a sampling rate of 96 kHz allowing an encoding dynamic range of 28 dB AES EBU digital inputs The LA4X can be fed with up to four AES EBU digital audio signals transported in pairs using XLR input connectors AES EBU IN A amp B and AES EBU IN C amp D see Figur
12. the group parameters or press the ESC key two times to abort END If the controller displays GROUP CONFLICT CANNOT LOAD PRESET it means that its output channels have been assigned to groups see section 4 3 1 group information and that the assignation structure is not compatible with the channel sets of the preset to load see section 4 7 Moreover as it is connected to L NET see section 4 2 3 it is not possible to cancel the group parameters to allow loading the preset Press the ESC key to abort END LA4X LM EN 4 0 WWW L ACOUSTIC S C OM 29 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 LL group parameters cleared m ml ha ma group parameters cleared group parameters still active Figure 26 Loading a preset example with a factory preset Complements about the LOAD PRESET screen i The upper line of the screen displays the preset family allowing coarse selection while the bottom line displays the preset name allowing preset selection within a family If the name of the displayed preset has been modified user presets only it is possible to display the original name pressing and holding the encoder wheel 4 5 STORE PRESET The current preset and the possible setting modifications can be stored to a user memory 1 10 Modifications flag The modifications of the preset parameters are indicated by a star sign on
13. the top right corner of the LCD screen until the preset has been stored to a user memory or set to its initial settings There is a risk of loosing the preset parameter modifications Preset parameter modifications see section 4 7 are not automatically saved to the current preset they will be lost if the preset is reloaded prior to storing it e g while the star sign is displayed However the current state is saved when the controller is shut down To store a preset follow these steps see also Figure 27 From the main menu select STORE PRESET 2 Turn the encoder wheel to scroll through the user memories 3 Press the OK key or the encoder wheel to select a user memory or ESC to abort 4 If the controller displays OVERWRITE it means that a preset is already stored in the selected user memory Press the OK key or the encoder wheel to validate or ESC to abort 5 If necessary enter a new preset name 16 characters max as follows a Turn the encoder wheel to select the first character b Press the encoder wheel to go to the next character c Repeat these steps until the new name has been entered n Pressing the encoder wheel from the 16 character makes the cursor return to the first character so that it is possible to apply the procedure a new time for possible corrections 6 Press the OK key to validate or ESC to abort The preset is stored and the main screen is displayed LA4X LM EN 4 0 WWW L AGOUSTIGS GC
14. 18 3 4 4 SPEAKER cabling Loudspeaker system connection Before connecting a loudspeaker system refer to the applicable user manuals for further instructions The four 4 point SpeakON connectors on the SPEAKER panel see Figure 7 are for loudspeaker connection They are wired as follows see also Figure 10 Top left SpeakON connector Top right SpeakON connector Pin 14 oS Pin 24 Bottom left SpeakON connector Out 2 Fin 2 Ou4 not used not used Top left Top right on D gt COED GED si iat 7v x FJ f 354 34 17 X E kr n M E M ki SL Bottom left Bottom right DSP Out 2 1 1 Cis 2 FEE ES P DNE opt 4 1 E eor EE t S46 78 bee tem hy 0f Ei A Sis aaa Bu mr EN i IC Figure 10 Output audio paths LA4X UM EN 4 0 www L ACOUSTICS COM 19 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 The table below describes the maximum number of enclosures a single LA4X amplified controller can drive Table 4 Maximum number of enclosures per LA4X CO Passive I2XT Active I2XT I I 5XT ARCS WIDE FOCUS ARCS II KIVA KILO KUDO KARA For passive loudspeakers the value corresponds to the number of enclosures in parallel on the output For active loudspeakers the value corresponds to the number of sections in parallel on the output 3 4 5
15. A 125 V grounded MAINS 100 240V 50 60Hz 750W OUTPUT PWR PER CH IMP 1000W 4 Ohms CE X Figure 6 LA4X MAINS panel P Plug connection Strictly apply the specific safety regulations of the country of use Do not defeat the ground connection of the supplied power cord using an adaptor or any other methods If the plug does not match the local power outlet it can be cut off and wired to a suitable plug refer to the LA4X maintenance manual level 1 Verify that the plug conforms to the specific voltage and current rating given in section 3 3 1 3 3 6 Power consumption The LA4X power requirements depend on the load impedance and the signal level as indicated in the following table Table 2 LA4X mains input power and current draw Maximum output power Mains input power and current draw Number of Power per 1 3 max Pat 1 8 max Pat 0 26 A 0 1 A The current values are 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 nm Output power references A third of the maximum output power corresponds to the worst case scenario of a program source using highly compressed music or pink noise with amplifier driven to clip level An eighth of the maximum output power corresponds to a loud music program with a small dynamic range and 9 dB of headroom IEC standard power rating 3 3 7 Example of heat power calculation Connect a 4 Q load to each output channel of t
16. AL For applications requiring a high count of loudspeaker enclosures with optimized cost of amplification the LA4X can efficiently operate as a conventional amplified controller driving speakers in parallel from its four amplification channels with the added benefit of the 4 inputs when using passive loudspeaker enclosures 1 3 System components The system approach developed by L ACOUSTICS consists in offering a global solution that guarantees the highest and most predictable level of performance at any step of loudspeaker system deployment modeling installation and operation A complete L ACOUSTICS system includes enclosures amplified controllers cables rigging system and software applications The main components of an L ACOUSTICS system that includes the LA4X are the following 1 3 1 Powering and driving systems LA4X Amplified controller with DSP library and networking capabilities 1 3 2 Loudspeaker enclosures and cables Refer to the user manuals of the loudspeaker systems for detailed instructions about the enclosures and their connection to the LA amplified controllers 1 3 3 Rigging elements A Refer to the rigging manuals of the loudspeaker systems for detailed instructions about the rigging of the enclosures LA4X LM EN 4 0 WWW L ACOUS TICS C OM 7 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 1 3 4 Software LA NETWORK MANAGER Remote control and monitoring of amplified controllers SOUNDVISIO
17. As a Starting point a standard balanced microphone cable of maximum length of 50 m 150 ft can be used to transport a signal of maximum sampling frequency of 48 kHz Higher sampling frequencies may require reducing the cable length since the signal attenuation in cables increases with the sampling frequency As AES EBU certified cables provide smaller attenuation length ratio it is highly recommended to use them in installations requiring long cable runs or high sampling frequency signals It is recommended to use single cuts of cable Using several pieces will reduce performances In case an amplified controller shutdowns the failsafe relay makes a passive connection between the AES EBU IN ports and the LINK ports to maintain continuity However the signals are no longer refreshed for the next amplified controller so that the input cable and the link cable must be considered as a unique input cable with regard to the maximum supported length 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 will be reduced while the additional information will anyway be cancelled by SRC to 96 kHz IN A amp B IN C amp D digital audio source Oy E cod Te i y Figure 9 Daisy chaining digital audio LA4X_UM_EN 4 0 WWW L ACOUSTICS COM
18. CD screen see Figure 14 LIMIT CLIP 5dB 10dB 20dB SIGNAL LOAD Figure 14 The four LED meters By default the LED meters monitor the state of the four output channels via six LED LIMIT CLIP The LIMIT CLIP LED is lit in e orange when the limiter is activated the output voltage is attenuated e red when the output voltage reaches the maximum level signal clip dB The 5 dB 10 dB and 20 dB LED are lit in green when the output voltage reaches respectively 5 10 and 20 dB below the maximum level SIGNAL The SIGNAL LED is lit in green when a signal is detected at the corresponding output of the amplified controller and when the output voltage reaches 0 1 V LOAD The LOAD LED is lit in green when a load is connected and when the output module delivers a minimum of 0 8 A 4 2 3 STATUS and L NET LED The STATUS LED is lit in e green see Figure 15 when the LA4X operates normally e red in case of firmware update or when a fault has been detected in the LA4X circuitry indicating that a protection system is active see Appendix A Protection systems The L NET LED is lit in green see Figure 15 when the LA4X is remote controlled from software such as LA NETWORK MANAGER refer to the LA NETWORK MANAGER video tutorial Front panel commands The front panel commands remain accessible if the L NET LED lit LIMIT CLIP 5dB STATUS 10dB 20dB SIGNAL LOAD Figur
19. CTIONS a WARNING TERMINALS marked with the lightning flash symbol are HAZARDOUS LIVE Read this manual Read all SAFETY INSTRUCTIONS carefully as well as DANGER and OBLIGATION warnings Never incorporate equipment or accessories not approved by L ACOUSTICS Read all the related PRODUCT INFORMATION documents before exploiting a loudspeaker system The product information document is included in the shipping carton of the related system component Strictly follow the installation instructions given in this manual 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 Read the MAINTENANCE MANUAL LEVEL 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 Inspect the apparatus before use If any sign of defect or damage is detected immediately withdraw the apparatus from use for maintenance Only use the apparatus in a conformed electro magnetic environment Conformed environments are specified in EN55103 2 standard as EI residential E2 commercial and light industrial E3 urban outdoors and E4 controlled EMC environment ex TV studio Avoid radio interference This apparatus has been tested and complies with the limits indi
20. EFAULT sde aken ied katmiseks omanda 41 APPENDIX A PROTECTION SYSTEMS 42 APPENDIX B APPROVALS 43 APPENDIX C SPECIFICATIONS 44 LA4X UM EN 4 0 WWW L AGOUSTIGS GCOM 6 1 INTEGRATED SYSTEM APPROACH 1 1 Presentation 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 1 2 System configurations The L ACOUSTICS systems can be operated in three connectivity modes as described below A LA CARTE The pool of four inputs and four amplification channels of the LA4X can be allocated a la carte to any passive speaker enclosures with a one to one to one link input processing amplification loudspeaker This approach is cost effective for applications requiring a high count of independent sound sources such as stage monitors multi channel systems and multi feed distributed systems FULL ACTIVE In high end installation projects the LA4X can drive active systems up to K2 for maximum power headroom and the best possible performances With one transducer section per output channel and the independent DSP treatment of each output this approach brings maximum discretization with a one to one link processing amplification transducer section CONVENTION
21. ET network it can be identified among other controllers in the workspace of LA NETWORK MANAGER refer to the LA NETWORK MANAGER video tutorial Press and hold the encoder wheel from the main screen to launch the Identification function The controller flashes in yellow in the workspace of LA NETWORK MANAGER While pressing the encoder wheel the L NET and OUT LED flash and the LCD screen displays IDENTIFICATION and the IP address of the controller see Figure 21 STATUS LA4X ESC INPUTS A D Figure 21 Launching the Identification function LA4X EN 4 0 WWW LrALODOUSTICS EOM 25 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 Input level input selection input mode and group information Press and hold the ESC or OK key from the main screen The LED meters and the top line of the LCD screen display information about input channels IN A IN B IN C and IN D respectively from left to right see Figure 22 The bottom line of the LCD screen indicates the group assignation of output channels OUT OUT 2 OUT 3 and OUT 4 respectively from left to right see Figure 22 STATUS input level input selection input mode and status output group assignation ESC OK INPUTS D Figure 22 Pressing ESC or LED SIGNAL to LIMIT CLIP indicate the level of the signal on the corresponding input channel For example in Figure 22 the signal of channel IN A has a level of 10 dB the
22. Figure 24 Figure 24 Lock and pin code protection messages In the first case the functionality cannot be accessed Press the ESC key to abort In the second case access the functionality entering the pin code as follows see also Figure 25 Press and hold the OUT key Or press the ESC key to abort 2 Turn the encoder wheel to select the first digit of the pin code 3 Release the OUT key 4 Repeat the procedure for keys OUT 2 to OUT 4 and the associated digits 5 Press the OK key If the controller returns to the page it means that the pin code is wrong Make corrections repeating the procedure Or press the ESC key to abort Else the functionality is displayed and can be accessed until you leave the current menu press OUTI Figure 25 Entering a pin code nm Disabling the protection You can disable the lock pin code protection only from LA NETWORK MANAGER entering the password defined for this amplified controller refer to the LA NETWORK MANAGER video tutorial LA4X LM EN 4 0 WWW L AGOUSTIGS GCOM 28 4 4 LOAD PRESET A preset can be loaded from the following menu pages Table 7 LOAD PRESET pages LOAD PRESET USER 10 read and write User presets stored by the user see section 4 5 Factory preset library created by L ACOUSTICS and LOAD PRESET FACTORY 11 199 read only automatically installed during firmware update refer to the LA NETWORK MANAGER video tutorial To lo
23. K key or the encoder wheel or ESC to abort 2 Turn the encoder wheel to select SCREEN CONTRAST 3 Press the OK key or the encoder wheel to enter the page or ESC to abort 4 Turn the encoder wheel to select a value between 0 and 100 96 5 Press the OK key or the encoder wheel to validate the setting or ESC to abort For example in Figure 39 the screen contrast has been modified from 80 96 to 30 96 4 11 4 LED amp BACKLIGHT MODE The brightness of the LED and the LCD screen can be set to OFF LOW MEDIUM NORMAL or SUNLIGHT To set the LED and LCD screen backlight mode follow these steps From main menu select OPTIONS and press the OK key or the encoder wheel or ESC to abort 2 Turn the encoder wheel to select LED amp BACKLIGHT MODE 3 Press the OK key or the encoder wheel to enter the page or ESC to abort 4 Turn the encoder wheel to select the chosen setting 5 Press the OK key or the encoder wheel to validate the setting or ESC to abort For example in Figure 39 the backlight mode has been modified from NORMAL to MEDIUM 4 11 5 RESET TO FACTORY DEFAULT SETTINGS To reset the amplified controller to its factory default settings follow these steps see also Figure 39 From the main menu select OPTIONS and press the OK key or the encoder wheel or ESC to abort 2 Turn the encoder wheel to select RESET TO FACTORY DEFAULT SETTINGS The controller displays RESET AMP TO FACTORY ARE YOU SURE 3 P
24. LA4X controllers used in a given network run the same firmware version 4 10 4 PRESET LIBRARY This page displays the version of the preset library in use in the controller For example Figure 38 shows preset library version 4 2 PRESET LIBRARY description Refer to the PRESET GUIDE for full description of the factory presets 4 10 5 MAC ADDRESS This page displays the MAC Media Access Control address of the amplified controller This address unique to each controller is the equivalent of a serial number and identifies the controller internationally It is set by the manufacturer and cannot be modified For example in Figure 38 the MAC address is 00 1B 92 01 90 3A LA4X UM EN 4 0 WWW L AGOUSTIGS GOM 38 4 11 OPTIONS This menu allows setting the amplified controller s general parameters These parameters are the following e IP address e delay unit ms meters feet or samples e LCD screen contrast e LED and LCD screen backlight mode An additional function allows resetting the amplified controller to its factory default state Figure 39 shows all pages of the OPTIONS menu Each one is detailed in sections from 4 11 1 to 4 11 5 Figure 39 OPTIONS menu pages LA4X LM EN 4 0 WWW L ACOUS TICS C OM 39 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 4 11 1 NETWORK ADDRESS Remote control of amplified controllers requires setting up a private local area Ethernet network to interconnect up to 253 un
25. N 3D acoustical and mechanical modeling Software documentation Refer to the LA NETWORK MANAGER video tutorial and the SOUNDVISION help LA NETWORK MANAGER LA4X SOUNDVISION Figure 1 Main components involved in loudspeaker system design and drive LA4X UM EN 4 0 WWW L AGOUSTIGS GCOM 2 LA4X AMPLIFIED CONTROLLER 2 1 Main features 2 1 Internal components 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 2 1 2 Front and rear panels m Am 11411 oor 14 cars NERA E 5 j UNK NK A 7 5 AI gt E B i A E IND f 5 e 10 if 12 13 14 15 Figure 2 LA4X front and rear panels Status LED 7 channel selection keys 2 LED meters 8 menu keys LIMIT CLIP level audio level 20 10 5 dB SIGNAL presence 10 PowerCON power supply connector LOAD presence L NET network control LED 9 inward ventilation grill and foam filter 1 outward ventilation grills 12 SpeakON output connectors in CIS play 13 XLR analog and AES EBU input connectors 14 XLR analog and AES EBU link
26. OM 30 press Figure 27 Storing a preset 4 6 DELETE PRESET A user preset contained in a user memory 1 10 can be deleted following these steps see also Figure 28 From main menu select DELETE PRESET If the controller displays NO PRESETS AVAILABLE it means that all user memories are empty Press the ESC key to abort END Else continue the procedure 2 Turn the encoder wheel to scroll through the user presets 3 Press the OK key or the encoder wheel to select a preset or ESC to abort The controller displays ARE YOU SURE 4 Press the OK key or the encoder wheel to validate or ESC to abort If the main screen is displayed it means that the selected preset has been deleted If the controller displays CANNOT DELETE THE CURRENT PRESET it means that the selected preset is the current preset thus it is not possible to delete it Press the ESC key to abort Figure 28 Deleting a user preset LA4X UM EN 4 0 WWW L ACOUSTIC S C OM 31 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 4 77 PRESET PARAMETERS The preset parameters gain delay polarity and input selection of the current preset can be set individually for each output channel or channel set see the following INFORMATION note nm Channel set In certain presets some channels are interdependent and form what is called a channel set Within a channel set the preset parameters are common to all channels On the LCD screen
27. S ESC INPUTS D Figure 18 Unmuting OUT LA4X UM EN 4 0 WWW L AGOUSTIGS GCOM 24 Gain control In quick access mode gain control applies for sets of output channels having input channels in common in their input selections see also section 4 2 1 The gain control procedure is the following From the main screen press and hold the chosen output key say OUTx The LCD displays the gain values of all output channels having in their input selection an input channel in common with the input selection of OUTx 2 Turn the encoder wheel to modify the gain values and simply release the key to return to the main screen STATUS LA4X ESC INPUTS A D Figure 19 Setting the OUT 3 gain Additional information about gain control Quick access gain control is only available from the main screen Gain values can be set at 0 1 dB resolution simply turn the encoder wheel or dB resolution gt simultaneously press and turn the encoder wheel Examples of output channels routed to the same input see Figure 20 e Pressing OUTI will select OUTI OUT3 and OUT4 containing A Pressing OUT2 will select OUT2 OUT3 and OUT4 containing B e Pressing OUT3 or OUT4 will select all channels containing A or Individual gain settings are available from the PRESET PARAMETERS menu see section 4 7 Figure 20 Multiple input selections Identification If the controller is connected to an L N
28. STIGS GOM 26 4 3 2 menu The main menu gives access to the pages listed in the following table Refer to the corresponding sections for detailed instructions LA NETWORK MANAGER software All parameters in each amplified controller can also be set from LA NETWORK MANAGER software refer to the LA NETWORK MANAGER video tutorial Table 5 Main menu description LOAD PRESET USER load a user preset memories 1 10 4 4 LOAD PRESET FACTORY load a factory preset memories 1 199 STORE PRESET save the current preset including the current settings as a user preset 45 memories 1 10 DELETE PRESET delete a user preset memories 1 10 PRESET PARAMETERS set the gain delay polarity and input selection parameters CLEAR GROUP PARAMS remove the group parameters defined in LA NETWORK MANAGER 4 software names gains delays and Contour EQs INPUT SETTINGS set the input mode fallback mode and AES EBU gain 4 display real time measured values RMS output voltage and output temperature in percentage of the maximum values E Eran display the firmware and factory preset library versions display the controller s MAC address set the controller s IP address OPTIONS set the delay unit LCD screen contrast and light mode reset all parameters to factory defaults To enter a page follow these steps see also Figure 23 Press and release the encoder wheel 2 Turn the encoder wheel clockwise or counterclo
29. TICS representative for maintenance Speakers 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 ensemble 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 LA4X UM EN 4 0 WWW L AGOUSTIGS GUM 42 APPENDIX B APPROVALS EC declaration of conformity L ACOUSTICS 13 rue Levacher Cintrat Parc de la Fontaine de Jouvence 91462 Marcoussis Cedex France States that the following product Established at Marcoussis France LA4X amplified controller July 15 2014 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 201 1 65 EU ROHS2 Directive Genio KRONAUER Head of Electronics Department 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 Emissions EN55103 2 Electromagnetic compatibility Product family standard for audio video audio visual and ente
30. X UM EN 4 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 WWW L ACOUSTICS COM
31. ad a preset follow these steps see also Figure 26 From the main menu select LOAD PRESET USER or LOAD PRESET FACTORY If the controller displays NO PRESETS AVAILABLE when you select LOAD PRESET USER it means that all user memories are empty Press the ESC key to abort END Else continue the procedure 2 Turn the encoder wheel to scroll through the presets 3 Press the OK key or the encoder wheel to select a preset or ESC to abort The controller displays ARE YOU SURE 4 Press the OK key or the encoder wheel to validate or ESC to abort If the controller displays the main screen it means that the preset has been successfully loaded END If the controller displays CLEAR GROUP PARAM OUTPUTS MUTED it means that it has been assigned to groups see section 4 3 1 group information and that it is no longer connected to L NET see section 4 2 3 Press the OK key to load the preset while clearing the group parameters or press the ESC key to load the preset while keeping the group parameters active END If the controller displays GROUP CONFLICT CLEAR GROUP PARAM it means that its output channels have been assigned to groups see section 4 3 1 group information and that the assignation structure is not compatible with the channel sets of the preset to load see section 4 7 Thus loading the preset is only possible if the group parameters are cleared Press the OK key to load the preset while clearing
32. al injury It can also notify the user about instructions that must be strictly followed to ensure safe installation or operation of the product OBLIGATION This symbol notifies the user about instructions that must be strictly followed to ensure proper installation or operation of the product EQUIPMENT This symbol indicates the equipment tools and spare parts required to perform a procedure nm INFORMATION This symbol notifies the user about complementary information or optional instructions WELCOME TO L ACOUSTICS Thank you for choosing the L ACOUSTICS LA4X amplified controller This document contains essential information on using the product properly Carefully read this document in order to become familiar with the product 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 document without prior notice Please check the L ACOUSTICS web site on a regular basis to download the latest document and software updates www l acoustics com LA4X UM EN 4 0 WWW L AGOUSTIGS GOM 4 CONTENTS 1 2 1 3 2 2 2 25 3 1 3 2 3 3 3 4 INTEGRATED SYSTEM APPROACH Proso nA O a er A ere ee Systemi COMMUN ALIOINS EEE EEEE TD YE COA S a E A ET 1 3 1 Powering Bid driving SY SEEMS
33. bility in the required system architecture The computer running LA NETWORK MANAGER and the amplified controllers are connected to each other using industry standard CAT5e U FTP cables or higher category fitted with RJ45 connectors The LA4X connects to the network via the two EtherCON sockets located on its rear panel nm Operating instructions Refer to the LA NETWORK MANAGER video tutorial for detailed operating instructions nm Third party management solutions L ACOUSTICS provides SNMP support to facilitate the integration via third party control and monitoring systems As a certified member of the CRESTRON and AMX partner programs L ACOUSTICS also provides software modules allowing control integration into their automation systems LA4X EN 4 0 WWW L AGOUSTIGS GCOM 12 3 INSTALLATION 3 1 Mounting The LA4X is two rack units high 2U and can be mounted in an ElA standard 19 rack see Figure 4 The four points on the front panel are for rack mounting Use the fixing material provided by the rack manufacturer to mount the controller to the rack front rails 434 mm 17 in 483 mm 19 in p 88 mm 3 5 in 420 16 5 in 406 mm l6 in 398 mm 15 7 in 76 mm 3 in 13 mm 0 5 in Figure 4 LA4X dimensions There is a risk of damaging the controllers during transport During transport or while on tour it is essential that the controllers are rear supported in additi
34. cated 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 Verify the electrical conformity and compatibility of the mains supply Only connect the apparatus to an AC power outlet rated 1 00 240 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 construction shall be connected to a mains socket outlet with a protective connection to earth 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 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 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 leve
35. ckwise to select a page 3 Press the OK key or the encoder wheel to enter this page or press the ESC key to return to the main screen On the LCD screen two types of arrow cursors indicate how to navigate 1 through the menus see Figure 23 Position cursors on the left Start of a menu Other functionalities can be displayed turning the encoder wheel clockwise of a menu Other functionalities can be displayed turning the encoder wheel clockwise or counterclockwise T of a menu Other functionalities can be displayed turning the encoder wheel counterclockwise Selection cursors on the right Another menu level or function can be accessed pressing the OK key or the encoder wheel Press the ESC key to return to the previous menu Figure 23 Main menu lt No additional menu level or function exist Turn the encoder wheel to access another menu or press the ESC key to return to the previous menu LA4X UM EN 4 0 WWW L ACOUSTIC S C OM 27 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 4 3 3 Access rights pin code The functionalities indicated in the following table can be locked or protected by a 4 digit pin code defined from LA NETWORK MANAGER refer to the LA NETWORK MANAGER video tutorial Table 6 Functionalities locked or protected by pin code When the protection is enabled each time one tries to use a protected functionality the LCD screen displays ACCESS LOCKED or ENTER PIN see
36. e 15 STATUS and L NET LED 4 24 OUT LED The OUTx LED see Figure 16 is e lit when output channel OUTx is muted e not lit see Figure 16 when output channel OUTx is unmuted Figure 16 The four OUT LED LA4X EN 4 0 WWW LrALODOUSTICS EOM 23 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 4 3 User interface 4 3 1 Quick access The LA4X offers quick access functions for control front panel locking mute and gain identification and monitoring display of the input level input selection input mode and group information Lock Unlock control P To lock the front panel even the mute function and prevent unintentional operation press and hold the ESC and OK keys simultaneously until Display Locked is displayed on the LCD screen see Figure 7 P unlock press and hold the ESC and OK keys simultaneously until Display Unlocked is displayed on the LCD screen STATUS Figure 17 Locking the front panel Mute control gt Tap one of the four output keys holding it less than 0 3 sec to mute or unmute the corresponding output channel The MUTE OUT page is displayed for 2 seconds see Figure 18 nm The output LED is lit when the corresponding output channel is muted and not lit when unmuted The quick access mute control is available at all times and positions in the menu tree Outputs are muted by default in all factory presets The gain can be set before unmuting LIMIT cL mm STATU
37. e 2 Each AES EBU input port is an XLR3 female connector The audio signals can come from a digital mixing desk or a digital audio network bridge compliant with the AES EBU AES3 or coaxial S PDIF IEC 60958 II digital audio standards Each AES EBU input port is ESD protected and transformer balanced The AES EBU input panel also features two XLR3 male link ports actively connected to the input ports with failsafe relay in case of mains absence They allow transmitting the input signals to daisy chained amplified controllers Each AES EBU link port is ESD protected and transformer balanced Each AES EBU input port is equipped with a Sample Rate Converter SRC that has been selected to support a wide range of input formats 16 24 bits 44 1 192 kHz It converts any of them to the 24 bits 96 kHz internal format used by the amplified controller The SRC is a high quality hardware component 140 dB dynamic range THD N lt 120 dBfs strong input jitter attenuation and provides constant propagation delay regardless of the input sampling frequency There is no external synchronization mode The amplified controller s clock always runs using its high precision internal quartz at 96 kHz This ensures low jitter and high audio quality in live conditions large cable lengths large number of amplified controllers while preventing phase shift as required for line source systems nm Digital domain benefits Keeping the signal in the digital doma
38. ed 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 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 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 LA4X EN 4 0 WWW L AGOUSTIGS GCOM 2 ADDITIONAL IMPORTANT SAFETY INSTRU
39. f digital signal failure on input pair AB Revert to input pair AB is not automatic and must be done manually by the user To select the fallback mode follow these steps see also Figure 36 From the main menu select INPUT SETTINGS and press the OK key the encoder wheel or ESC to abort Turn the encoder wheel to select FALLBACK MODE Press the OK key or the encoder wheel to enter the page or ESC to abort Turn the encoder wheel to select the chosen setting Press the OK key or the encoder wheel to validate the setting or ESC to abort Figure 36 Selecting the fallback mode n Invalid audio validity bit A validity bit at non audio value will not trigger the automatic fallback Instead the signal will be muted LA4X UM EN 4 0 WWW L ACOUSTIC S C OM 35 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 4 9 3 AES EBU GAIN The AES EBU input ports include a gain module common to all ports which can be set from 12 dB to 12 dB 0 1 dB steps It must be used when the fallback mode is enabled a digital audio source is connected to input pair AB and an analog audio source is connected to input pair CD The AES EBU GAIN allows aligning the digital audio source level to the analog level value so as to ensure seamless fallback switch from AES EBU to analog inputs in case of fallback mode activation refer to section 4 9 2 The AES EBU GAIN must be set according to the analog audio source s cal
40. he LA4X each channel can now deliver a power of up to 1000 W Consider a standard use at 1 8 of full power 9 dB headroom the power delivered per channel is then 1000 8 125 W leading to a total power of 4 x 125 500 W for the LA4X According to Table 2 the LA4X power consumption is 750 W the heat power produced is then 750 500 250 difference between power consumption and output power LA4X LM EN 4 0 WWW L AGOUSTICS COM 15 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 34 Audio and network cabling 3 4 1 Connection panels The LA4X rear side features three panels for audio and network cabling see Figure 7 e SPEAKER to connect loudspeakers e SIGNAL to connect analog and or digital AES EBU or S PDIF audio sources and link the signals to another amplified controller to connect to a network and be remote controlled from LA NETWORK MANAGER software Se E I AES E LI UNKACT ANALOG LINK A AES EBU NK ANALOG IN C LINK C SPEAKER SIGNAL analog and or digital L NET Figure 7 LA4X audio and network connection panels The XLR connectors of the SIGNAL panel can transport analog or digital signals depending on the input mode selected by the user for channel pairs AB and CD the two selections can be different The devices to connect to the IN connectors are given in the following table see also section 4 9 for input mode selection Table 3 Devices t
41. ibration based on manufacturer s specs or user measurements and the amplified controller s analog inputs calibration 0 dBfs for an input signal of 22 dBu The three following examples illustrate the most common cases Ifthe analog audio source is calibrated at 18 dBu for 0 dBfs set the AES EBU GAIN to 4 dB e Ifthe analog audio source is calibrated at 24 dBu for 0 dBfs set the AES EBU GAIN to 2 dB Ifthe analog audio source is calibrated at 22 dBu for 0 dBfs or if the fallback option is disabled or if a digital audio source is connected to input pair CD set the AES EBU GAIN to 0 dB To set the AES EBU GAIN follow these steps see also Figure 37 From the main menu select INPUT SETTINGS and press the OK key the encoder wheel or ESC to abort 2 Turn the encoder wheel to select AES EBU GAIN 3 While holding the ESC OK or OUTI key turn the encoder wheel to select an input gain value and release the key The setting applies in real time when turning the encoder wheel Value setting resolution P Turn the encoder wheel to obtain a 0 1 step resolution gt Press and turn the encoder wheel to obtain a step resolution release Figure 37 Setting the AES EBU GAIN LA4X UM EN 4 0 WWW L AGOUSTIGS GCOM 36 4 10 MONITORING AND INFO This menu provides real time measurements to monitor the output channels and provides the versions of embedded software In more details the MONITORING AND INFO
42. in will provide the following benefits with any digital mixing desk or any audio network compared to the analog signal distribution e Better audio quality by removing one D A A D cycle e Better dynamics thanks to the digital links immunity to ground loops e Optimized level chain by removing the risk of level misalignment between console and amplified controllers e Digital signal refreshed at each amplified controller in a daisy chain e Improved maximum cable length The LA4X has been tested with up to 305 m 1000 ft of 3 models of AES EBU rated cables Belden 1696A Klotz Cables OT234H and Sommer Cable SC BINARY 234 single cuts digital source signal running at Fs 48 kHz LA4X EN 4 0 WWW L AGOUSTIGS GOM 10 22 2 DSP architecture The proprietary algorithms allow optimum performance and protection of each individual transducer of the L ACOUSTICS systems for an even more natural transparent and realistic sound experience e The DSP engine is a 32 bit floating point DSP at 96 kHz sampling rate providing an enhanced dynamic range since it does not generate calculation clips like a fixed point DSP e A dedicated engineering approach combining IIR and FIR filters generates perfectly linearized phase curves and significantly improved impulse responses e The 4 x 4 matrix architecture offers flexibility for various system configurations Adelay of up to 1000 ms can be set for each output channel e The L DRIVE tran
43. input pair AB to input pair CD in case of digital signal failure on input pair AB no clock loss of lock CRC error bipolar encoding error data slip This option prevents sound cut After the digital signal has returned to normal state reverting to input pair AB is not automatic and must be done manually by the user This can be done simultaneously for all concerned amplified controllers from LA NETWORK MANAGER software o Precautions for using the automatic fallback option Before enabling the automatic fallback option some precautions have to be taken in order to avoid sound cut or level differences in case of switch from input pair AB to input pair CD Input pair CD must be connected to an audio source analog or digital playing the same program as the digital audio source connected to input pair AB e When an analog audio source is connected to input pair CD the level of the digital audio source connected to input pair AB must be aligned to the level of the analog audio source using the AES EBU GAIN control see section 4 9 3 Two FALLBACK MODE settings are available as described in the following table Table 8 FALLBACK MODE settings Automatic fallback option disabled The sound will be cut off in case of digital signal failure on input pair AB but it will automatically be recovered when the signal has returned to normal state Automatic fallback option enabled Input pair CD will automatically be selected in case o
44. ion to earth 3 3 2 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 3 3 3 Circuit breaker Always interconnect a Class C thermal circuit breaker between the apparatus and the mains supply h 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 3 3 4 Electrical generator Planning the power of the generator in kVA Consider the LA4X will draw 10 max from 230 V A typical generator has a power factor cos 0 8 and should operate at 70 96 load for good efficiency The kVA provision for one LA4X should therefore be 10A x 230V 0 8 x 70 4 1 kVA LA4X EN 4 0 WWW L AGOUSTIGS GCOM 14 3 3 5 Power cord The LA4X is supplied with a removable power cord One side of the power cord is fitted with PowerCON connector to connect to the MAINS panel the rear side of the controller see Figure 6 The other side is fitted with a plug LA4X to connect to mains SETAE MNT The plug type depends on the country of use according to the following table Table Power cords for LA4X Plug type CEE 7 7 16 A 250 V grounded USA NEMA 5 15 15
45. its with a single control computer and possible additional devices such as Ethernet switches It is called L NET and uses a proprietary communication protocol based on TCP IPv4 called L COM The IP addresses on the units are class C addresses and must be set manually The default subnet for L NET is 192 168 1 0 IP address setting o Each unit must be given an IP address that is not already in use by another device on the network For practical reasons it is suggested to start numbering the units at 192 168 1 1 and then 192 168 1 2 192 168 1 3 and manually set the control computer on 192 168 1 254 nm An IP address is a unique identifier for a network device on a given IP network In IPv4 networking it is made of 4 bytes In class C private local area IP subnets the three first bytes are the network prefix and the last byte is the device identifier on the subnet Regarding device identifiers two numbers are reserved 0 for designating the subnet and 255 to communicate with all devices of the subnet aka the IP broadcast address To select the IP address of a controller follow these steps From the main menu select OPTIONS and press the OK key or the encoder wheel or ESC to abort 2 Press the OK key or the encoder wheel to enter the NETWORK ADDRESS page or ESC to abort 3 Turn the encoder wheel to select a value for the last byte Value setting resolution P Turn the encoder wheel to obtain a step resolution P Press
46. l is high enough Do not use the apparatus outside its operating temperature range The apparatus operates at a room temperature between 0 and 50 C Do not expose the apparatus to direct sun 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 LA4X LM EN 4 0 WWW L AGOUSTICS COM 3 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 16 Do not place naked flame sources such as lighted candles on the apparatus 17 Use the original packaging or accessories approved by L ACOUSTICS rack case to transport the apparatus SYMBOLS The following symbols are used in this document 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 ELECTRICAL HAZARD This symbol indicates a potential risk of electric
47. mains below 45 C they run at their slowest speed Above 45 C the speed is increased until it reaches its maximum value If a temperature of more than 60 C is detected at output channel x the signal delivered at this output channel is attenuated and the controller displays High Temperature see the figure on the right If the temperature exceeds 65 C channel x is muted and the controller displays Over Temperature see the figure on the right In both cases the protection will automatically be disengaged when the temperature returns to nominal state If one of the two fans is ineffective the controller displays Fan blocked see the figure on the right The controller remains operational but there is a risk of temperature rising Output channel current The output channels are continuously monitored for unexpected current values error If an external error is detected at output channel x typically due to a short circuit in a cable this channel is muted and the controller displays Error see the figure on the right The channel will automatically be unmuted as soon as the issue is solved If an internal error is detected at output channel x typically due to a cross conduct in the power stage this channel is disabled and the controller displays Error see the figure on the right porc For safety reasons the other channel in its pair OUT 1 2 or OUT 3 4 is also EL disabled The controler must be sent to an L ACOUS
48. menu allows to e Display in real time the RMS output voltage and output temperature for each output channel The output voltage is given in percentage of the maximum value supported by the particular transducer section connected The temperature is given in percentage of the operating range e Display the firmware and factory preset library versions Display the controllers MAC address Figure 38 shows all pages of the MONITORING AND INFO menu Each one is detailed in sections from 4 10 1 to 4 10 5 Figure 38 MONITORING AND INFO menu pages LA4X UM EN 4 0 WWW L ACOUS TICS C OM 37 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 4 10 1 SPK HANDLING This page displays the RMS voltage measured at each individual amplifier circuit output as a percentage of the maximum voltage supported by the particular speaker section connected to it For example in Figure 38 the RMS voltage of channels OUT to OUT 4 is respectively 12 10 13 and 11 96 of the maximum values 4 10 2 OUT CH TEMP This page displays the temperature of each individual amplifier channel circuit as a percentage of the maximum operating temperature 60 C 100 96 For example in Figure 38 the temperature of channels OUT to OUT 4 is respectively 52 53 50 and 48 90 4 10 3 FIRMWARE This page displays the version of LA4X firmware in use in the controller For example Figure 38 shows LA4X firmware version 1 0 3 3 Network Always ensure that all
49. o connect to the IN connectors vs input mode Input mode AB IN A IN A amp B Or ANALOG analog audio source channel analog audio source channel AES EBU digital audio source 2 channels not used Input mode CD IN C IN C amp D IND ANALOG analog audio source channel analog audio source channel AES EBU digital audio source 2 channels Each LINK connector is wired to the corresponding IN connector and thus transports the same type of signal Digital audio source specifications Standard AES EBU AES3 or coaxial S PDIF IEC 60958 Type II Sampling frequency 44 1 48 64 88 2 96 128 176 4 or 192 kHz Word length 16 18 20 or 24 bits LA4X UM EN 4 0 WWW L AGOUSTIGS GCOM 16 3 4 2 Analog SIGNAL cabling The eight XLR3 connectors of the SIGNAL panel see Figure 7 are wired according to IEC 268 pin shield pin 2 signal pin 3 signal The four female XLR3 input connectors ANALOG IN A to ANALOG IN D can receive up to four analog signals when setting the analog input mode for channel pairs AB and CD The headroom of the input circuits is high enough to accept the maximum output level from virtually any line level signal source up to 22 dBu In a daisy chain layout the four male XLR3 link connectors LINK A to LINK D feed the input signals to the next amplified controller in the signal chain see Figure 8 Each LINK connector is passively wired in parallel on the corresponding IN channel
50. on is not allowed since the amplified controller is remote controlled Press the ESC key to abort END If the controller displays NO GROUP DEFINED CANNOT CLEAR it means that the operation is not possible as no group are defined Press the ESC key to abort END If the controller displays ARE YOU SURE OUTPUTS MUTED it means that the operation can be continued and that all outputs will be muted as a precaution Continue the procedure 3 Press the OK key or the encoder wheel or ESC to abort The main screen is displayed all group parameters are now reset and all outputs are muted Figure 31 Clearing the group parameters Group parameters persistence The group parameters remain active even if the controller is disconnected from the computer running LA NETWORK MANAGER controller in the standalone mode even if it is shut down and restarted Moreover the group parameters are not preset dependent they will remain the same even if a new preset is loaded Therefore when getting a controller for a standalone application that has been previously used within a network L ACOUSTICS recommends using the CLEAR GROUP PARAMS function to clear all group parameters as they cannot be seen and accessed via the front panel user interface Group information It is possible to verify if output channels of the controller are part of groups pressing and holding the ESC or OK key from the main screen refer to section 4 3 1 group informa
51. on to the front panel mounting Use the rear rack support brackets provided with the controller as shown in Figure 5 Any mechanical damage to the controllers used in portable applications without rear support will not be covered by warranty A ES E E 00 E E Figure 5 LA4X with rear rack support brackets LA4X UM EN 4 0 WWW L ACOUSTIC S C OM 13 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 3 2 Ventilation To maintain a moderate operating temperature the LA4X contains two fans providing front to rear airflow 1 Instructions for proper ventilation 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 Ensure that the front foam filter is clean Do not block the front and rear ventilation grills on a controller If the controller is rack mounted Do not block the ventilation grills with front or back panels or doors If not possible use a forced ventilation system e When stacking more than one controller in a rack mount them directly on top of each other or close any open space in the rack with blank panels 3 3 Connecting to AC mains 3 3 1 mains specifications Only connect the LA4X to an AC power outlet rated 100 240 V 50 60 Hz with the following current values 20 A for 100 120 V IO A for 200 240 V The LA4X must be connected to a mains socket outlet with a protective connect
52. r s digital audio card and no loss or fault is being detected during data transfer If these conditions are not fulfilled the status will turn to LOCK WARN or UNLOCK The LOCK WARN status Figure 33 left indicates that the incoming digital signal has a sampling frequency out of the nominal range that does not lead to sound cut On the contrary the UNLOCK status Figure 33 right indicates a faulty digital signal leading to sound cut Figure 33 LOCK WARN and UNLOCK statuses Sound cut can be avoided using the FALLBACK MODE on channel pair AB and a backup audio source connected to channel pair CD refer to section 4 9 2 In case of UNLOCK status the CD inputs will automatically be selected leading to one of the screens of Figure 34 FALLBACK CD indicates that the amplified controller has switched from inputs AB to CD The text displayed on the right UNLOCK LOCK WARN or LOCK 44k1 informs the user about the status of the digital audio source connected to AB Figure 34 FALLBACK statuses LA4X EN 4 0 WWW L AGOUSTIGS GOM 34 When the LOCK status has been recovered the user can manually reactivate channel pair AB applying the sequence described in Figure 35 OK MT OK p Figure 35 Reactivating channel pair AB 4 9 2 FALLBACK MODE An automatic fallback option can be enabled or disabled When enabled and when the AES EBU input mode is selected for input pair AB the amplified controller will automatically switch from
53. ress the OK key or the encoder wheel to confirm or ESC to abort The start up sequence is launched refer to section 4 1 When complete the main screen is displayed with the default preset memory 011 and IP address 100 indicating that the amplified controller has returned to its factory default settings and that all user memories have been deleted i Disconnect the controller from LA NETWORK MANAGER It is recommended to disconnect the controller from LA NETWORK MANAGER before using the RESET TO FACTORY DEFAULT SETTINGS function In the contrary case if a virtual unit is present in the workspace at IP address 100 with a preset of same family as preset 011 its parameters will automatically be loaded to the controller after reset and restart LA4X LM EN 4 0 WWW L ACOUS TICS C OM 41 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 APPENDIX A PROTECTION SYSTEMS The LA4X electronic vital parts are continuously monitored by the embedded operating system to optimize the power resources while ensuring safety even under extreme conditions Each time a protection system is activated a warning message blinks on screen and the STATUS LED is also lit in red nm Remote monitoring In LA NETWORK MANAGER the activation of a protection system is indicated by an Event Message refer to the LA NETWORK MANAGER video tutorial Output channel temperature The fans associated to the heat sinks operate permanently but as long as the temperature re
54. rom 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 for substantial savings The Class D amplification circuits ensure the LA4X energy efficiency for minimal heat dissipation LA4X delivers 4 x 1000 W RMS into 8 4 Q with record hold times Besides the high raw power rating at 8 Q the ability to deliver energy power x hold time yields the best performance from loudspeaker systems especially in LF reproduction 2 2 4 Speaker outputs The LA4X features four SpeakON connectors for loudspeaker outputs 2 3 Monitoring and control 2 3 1 User interface The front panel user interface provides see also Figure 2 e Real time monitoring functionalities via the LED display signals presence and level and the LCD screen system parameters e Instant access to navigation and parameters control using the encoder wheel and the six keys Operating instructions Refer to section 4 for detailed operating instructions 2 3 2 remote control network The design of complex systems is made possible by the integration of the L NET Ethernet based network Thanks to its high speed data transfer protocol of 100 Mbit s up to 253 amplified controllers can be controlled and monitored in real time from LA NETWORK MANAGER software Multiple network topologies such as daisy chain star and hybrid are quickly and easily configurable for full flexi
55. rtainment 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 Additional approvals The LA4X amplified controller holds the following certificates KC PSE CSA and CCC LA4X UM EN 4 0 WWW L ACOUS TICS C OM 43 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 APPENDIX SPECIFICATIONS GENERAL Output power 1 THD kHz all channels driven Max output voltage Amplification class 4 x 1000 W RMS at 4 or 8 Q 150 V Peak voltage no load Class D Digital Signal Processor DSP SHARC 32 bit floating point 96 kHz sampling rate Frequency response Distortion THD N Output dynamic range Amplification gain Noise level Channel separation Damping factor Mains input power and current draw all channels driven 20 Hz 20 kHz 0 25 dB at 8 0 05 96 20 Hz 10 kHz 8 11 dB below rated power dB 20 Hz 20 kHz 8 A weighted 32 dB 7 dBV 20 Hz 20 kHz 8 A weighted gt 80 dB at kHz 8 O gt 500 100 Hz and below 8 Maximum output power Mains input power and current draw Nb of driven Teen 1 3 Output 1 8 Output Load per IDLE Standby THAM Power 5 dB Power 9 dB 4or 8 0 26A lt OIA 1000 W 7 1600 W 750 W Current values given for a mains rated at 230 V Multiply
56. sducer protection system offers advanced protection by simultaneously monitoring the excursion and the temperature of the transducer e With a complete factory preset library and the possibility to create additional user presets the flash memory provides a quick access to all the usual L ACOUSTICS speaker system configurations refer to the PRESET GUIDE GAIN 1 Array Morphing multi band EQ IN B GAIN Array Morphing multi band EQ 30 INC GAIN 1 1 Array Morphing multi band EQ EI IND m GAIN BEL Array Morphing multi band EQ B can be set from LA NETWORK MANAGER only X can be set from LA NETWORK MANAGER and the LA4X interface locked 4 i can be managed by groups x L ACOUSTICS parameters IIR filters Bessel BTW LR Over excursion Thermal protection protection FIR filters zero phase shift Figure 3 Audio path parameters LA4X UM EN 4 0 WWW L ACOUSTIC S C OM 11 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 2 2 3 Power supply and amplifier section LA4X is a green amplified controller that relies on a universal Switch Mode Power Supply SMPS suitable for mains from 100 to 240 V 10 96 The SMPS features a Power Factor Correction PFC which maximizes the amplifier efficiency 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 f
57. signal of channel IN has a level of 20 dB and channels IN C and IN D receive no signals i Input voltage values The SIGNAL LED is lit when the input voltage reaches 38 dBu analog audio source or 60 dBfs digital audio source The CLIP LED is lit when the input voltage reaches 22 dBu analog audio source or 0 1 dBfs digital audio source Reminder 38 dBu 10 mV and 22 dBu 9 8 V LED LOAD is lit if the corresponding input channel is part of the input selection of at least one output channel see also section 4 2 1 For example in Figure 22 channel IN A and IN B are selected and channels IN C and IN D are not selected The top line of the LCD screen indicates the input mode and status of input channel pairs AB and see also section 4 9 1 For example in Figure 22 pair IN A IN B receives an AES EBU signal of 44 1 kHz and pair IN C IN D is configured to receive ANALOG signals The brackets indicate that the input mode cannot be different between IN A and IN B or between IN C and IN D The bottom line of the LCD screen indicates the group assignation of the corresponding output channel see also section 4 8 For example in Figure 22 channels OUT and OUT 2 are linked by brackets it means that they are assigned to the same group or set of group if an output channel is assigned to several group the group name is mult_grp OUT 3 is not assigned to any group and OUT 4 is assigned to group All LA4X UM EN 4 0 WWW L AGOU
58. st number in the IP address to 254 Identifies the controller within the L NET network see section 4 11 1 4 Starsign Indicates that parameters have been modified after the preset was last stored see section 4 5 5 Output name and input selection Label placed above each output key written in the xx x format where e The first two characters indicate the type of transducer section or enclosure to be connected to the output channel LF frequency transducer section part of a 2 or 3 way loudspeaker enclosure MF mid frequency transducer section part of a 3 way loudspeaker enclosure HF high frequency transducer section part of a 2 or 3 way loudspeaker enclosure PA passive loudspeaker enclosure SB subwoofer enclosure installed with front face pointing towards the audience SR subwoofer enclosure installed with front face pointing towards the direction opposite from the audience part of a cardioid configuration e The last or last two character s indicate the input selection of the output channel which input channel or input channel combination is selected to drive this output channel see also section 4 7 A INA B IN B A sum of IN Aand IN B A B A difference between IN A and IN A B C IN C D IN D C sum of IN C and IN D C D difference between IN and IN D C D LA4X_UM_EN 4 0 WWW L AGOUSTIGS GOM 22 4 2 2 LED meters Four LED meters are located on the front panel above the L
59. the channel sets are indicated by brackets displayed above the corresponding output channel keys For example Figure 29 shows on the left a preset composed of two channel sets LF HF LF HF for 2 way active loudspeakers and on the right a preset composed of one 4 channel set SR SB SB SB for 4 subwoofers in cardioid configuration Two 2 channel sets LF HF LF HF One 4 channel set LF LF MF HF Figure 29 Channel sets To set the preset parameters follow these steps see also Figure 30 From the main menu select PRESET PARAMETERS 2 Turn the encoder wheel to select a preset parameter 3 Press and hold the chosen output key or any output key of a channel set and turn the encoder wheel to select a value or press ESC to abort 4 Release the key 5 Repeat the procedure for each value to be set 6 Press ESC to return to the main menu nm If necessary all preset parameters including the preset name can be reset to default values following these steps see also Figure 30 Turn the encoder wheel to select RESET PRESET 2 Press the OK key or the encoder wheel two times or ESC to abort e hold 4 OUT3 release EHE OUTS mS same sequence as for GAIN Figure 30 Setting the preset parameters LA4X LM EN 4 0 WWW L AGOUSTIGS GOM 32 nm Value ranges Gain values are adjustable between 60 dB and 15 dB Delay values are adjustable from 0 to 1000 ms 96000 samples 343 33 m 1126
60. tion LA4X LM EN 4 0 WWW L AGOUSTICS COM 33 LA4X AMPLIFIED CONTROLLER USER MANUAL VERSION 4 0 49 INPUT SETTINGS 4 9 1 INPUT MODE The XLR connectors of the SIGNAL panel see section 3 4 1 can receive analog or digital signals depending on the type of audio sources connected to them The input mode function allows selecting the type of signal for channel pairs AB and CD n The input mode selection can be different between channel pairs AB and CD But it cannot be different between input channels A and B or C and D To select the input mode follow these steps From the main menu select INPUT SETTINGS and press the OK key the encoder wheel or ESC to abort Turn the encoder wheel to select INPUT MODE AB or INPUT MODE CD Press the OK key or the encoder wheel to enter the page or ESC to abort Turn the encoder wheel to select ANALOG or AES EBU Mr de UBL S Press the OK key or the encoder wheel to validate the setting or ESC to abort same sequence as for AB Figure 32 Selecting the input mode In Figure 32 the AES EBU input mode has been enabled LOCK 44kI is a status message indicating that the AES EBU input mode is active and that the digital audio source provides signals of sampling frequency of 44 1 kHz The LOCK status is obtained under the following conditions a digital audio source is connected to the AES EBU input the signal delivered by the source has a format supported by the controlle
61. y ANALOG INPUT DATA Input impedance 22 balanced Max input level 22 dBu balanced THD Latency 3 84 ms A D conversion four cascaded 24 bit analog digital converters 128 dB dynamic range DIGITAL INPUT DATA Standard AES EBU AES3 or coaxial S PDIF IEC 60958 Il did a Sampling frequency Fs 44 1 48 64 88 2 96 128 176 4 or 192 kHz P 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 Sampling frequency 96 kHz SRC referenced to the amplified controller internal clock Word length 24 bits Sample Rate Converter SRC Dynamic range 140 dB Distortion THD N 120 dBfs Bandpass ripple 0 05 dB 20 Hz 40 kHz 96 kHz Mode AB to CD digital to analog or digital to digital Switchover conditions no clock loss of lock Automatic fallback CRC error option 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 434 mm 17 in c 483 mm 19 in m t E VIE pall E c E Een el E i Weight 1 3 kg 24 9 Ib Finish black Protection rating IP3x LA4X EN 4 0 WWW L ACOUSTIC S C OM 45 Document reference LA4

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