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LA4 amplified controller

1. AE Maa E A SIN ad UU V E cesiMeIn oen 9 2 4 Solin AL 2 ADI AT EFE p 9 3 LA4 AMPLIFIED CONTROLLER 10 3 1 Pa aa a 10 3 1 1 EE OO E E 10 3 1 2 Simplified Block EE aiad E 3 2 Signal processing and amipliffCat OM spetsid E NEEN Cet EAEE eakate 3 2 1 PAV AN OR IR PIU NER EE TEE TET OTT 3 2 2 AESEBU Ao MDL eX E 3 2 3 DSP archoU E ste E E EAE E E E EA 12 3 2 4 Amplifier section and power SUPDIV sand uev En te Ee iNOS QS 13 3 2 5 Peker OME UI c MM 13 3 3 13 3 3 1 A e crm 13 3 3 2 L NET and remote control network 2 0 020 nennen hee trennen nennen 13 4 INSTALLATION 14 4 NEED QUU 14 4 2 IM NH P 15 4 3 See OO 1 990 aa 15 4 3 1 AC
2. m am a 9 15 4 3 2 Tres Pir ARCHIE aaa esmamainiti laitis 15 4 3 3 Gret Bree M 15 4 3 4 Pleci carae ner ET TETTE EE l6 4 3 5 POW GU DID a is alana aiaiai aiamaa aaa DA MERO UE l6 LA4 UM EN 6 0 WWW L AGOUSTICS COM 5 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 4 3 6 gesserat TP 4 3 7 Example of heat power calculation iret e pesa ete eoe opes kit edes Sep CA aUa a VER laka VM a Vac Ea ox aped UAR Pe REe UU MEE SES 44 Audioandnetwork ioi aias desi UR Oda Neb MU C BIUE 4 4 1 SOT COM T 4 4 2 PUWALOS o CAINS NER CL EEA E E DE DT 4 4 3 Loudspeaker E OE E D 4 4 4 SIE MP EMEN DER UU MUS 5 OPERATION 5 1 Powering powering off selecting standby rennen teens 5 2 d I 5 2 1 ME SCPC CIN E TIE D 5 2 2 5 2 3 LNE TEED ce M 5 3 T t comme
3. Figure 2 LA4 front and rear panels LED meters 7 inputselection menu keys 8 output selection keys audio level 25 10 5 dB SIGNAL presence 9 analog audio IN LINK connectors XLR 10 L NET network IN OUT connectors RJ45 l Slot for the optional LA AES3 AES EBU input 3 LCD screen board refer to the LA AES3 user manual 4 nav edit encoder wheel 12 SpeakON output connectors 5 power switch 13 ventilation grill 6 ventilation foam filter 14 A C power cord LA4 UM EN 6 0 WWW L AGOUSTIGS GOM 10 3 1 2 Simplified block diagram The core of the LA4 is a DSP engine driving four channels of amplification from two inputs The LA4 also features a flash memory for preset storage and management high performance A D D A converters for audio signals an auto sensing SMPS Switched Mode Power Supply a front panel user interface and a Fast Ethernet device for network remote control Figure 3 LA4 simplified block diagram 3 2 Signal processing and amplification 3 2 1 Analog input The LA4 can be fed with two balanced analog audio signals using the appropriate XLR input ports see Figure 2 Each of the analog input ports is ESD protected and equipped with one XLR3 female connector The analog input panel also features two XLR link ports passively connected to the input ports It allows transmitting the input signals to daisy chained amplified controllers Each of the anal
4. 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 WWW L ACOUSTICS COM 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 SAFETY INSTRUCTIONS 2 3 4 Read this manual Follow all SAFETY INSTRUCTIONS 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 the system The product information document is included in the shipping carton of the related system component Environments Use the product only in El E2 E3 or E4 environments according to EN55103 2 standard Radio interference A sample of this product has been tested and complies with the limits for the EMC Electro Magnetic Compatibility directive These limits are designed to provide reasonable protection against harmful interference from electrical equipment However there is no guarantee that interference will not occur in a particular installation Power cord caution Do not use the product if the power cord is broken or frayed Protect the power cord from being walked upon or pinched particularly at the plugs and the point where the power cord exits from the apparatus Mains supply Only connect the LA4 CE type or LA4US US type to an AC power outlet rated 230 V 16 A 50 60 Hz or 120 V 30 A 50 60 Hz Only connect the LA4JP Japan model to an AC power outlet rated 100 V 30 A 50 60 Hz or 200 V 15 A 50 60 Hz
5. If a persistent DC voltage is detected at output channel x this channel is disabled and the controller displays DC see the figure on the right DC on Channel After the issue has been solved the controller must be restarted manually to re Channel Disabled activate channel x 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 Error on Channel the right Channel Muter 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 E Ci 1 3 FrFoF Ngure Channel Disabled For safety reasons all other channels are also disabled The controller must be sent to an L ACOUSTICS 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
6. 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 LA4 or an LA4US to two live wires of a 120 V three phase circuit Never try to reproduce a 200 V circuit connecting an LA4JP to two live wires of a 100 V three phase circuit Electrical generator You must power on the generator before powering on the amplified controllers Verify that the amplified controllers are turned off before powering on the generator Thermal circuit breaker Always interconnect a thermal circuit breaker between the product and the mains The circuit breaker current rating depends on the mains voltage rating as follows 6 A for 230 V or 30 A for 120 V LA4 or LA4US 15 A for 200 V or 30 A for 100 V LAAJP Grounding To plug the controller to mains only use an outlet fitted with a pin tied to ground Do not defeat the ground pin of the outlet as it connects the controller to earth If the local outlet is obsolete consult an electrician The product is fitted with a grounding type plug Do not defeat the ground wire connecting the plug s female contact to the product s chassis Plug replacement If the AC plug on the power supply cord of this product does not match the local outlet it must be replaced by an appropriate one This operation should only be performed by qualified service personnel Verify that the cut off plug is wit
7. The original certificates are available upon request RoHS Directive EU 2002 95 EC LA4 UM EN 6 0 WWW L AGOUSTIGS GOM 42 APPENDIX C SPECIFICATION GENERAL Output power EIA 1 THD kHz all channels driven Max output voltage Circuitry 80 4 x 800 W RMS 4 x 930 W peak 40 4 x 1000 W RMS 4 x 1600 W peak 125 V Peak voltage no load Bipolar Class H 2 step high efficiency circuit SHARC 32 bit floating point 96 kHz sampling rate Digital Signal Processor DSP Frequency range Distortion THD N 10 Hz 30 kHz 0 1 0 15 dB at 8 Q Distortion THD N lt 0 03 20Hz 10kHz 8Q 11 dB below rated power 00 Output dynamic range Amplification gain Noise level Channel separation Damping factor 112 dB 20 Hz 20 kHz 8 A weighted 32 dB 73 dBV 20 Hz 20 kHz 8 A weighted gt 80 dB at kHz gt 400 8 O kHz and below Maximum output power Mains input power and current draw Nb of driven Power per 1 3 Output 1 8 Output Mains input power road Power 5 dB Power 9 dB p kk and current draw 40 1000W 22A 3250W I2A 1600W 03A 0 1 A all channels driven 80 800W 17 2550 9A 1350W 80W 12W Current values given for a mains rated at 230 V Multiply by 2 for 120 V 1 15 for 200 V and 2 3 for 100 V If the voltage outsides a plus or minus 0 96 range the maximum power is no longer guaranteed Mains ratings Operating temperature Circuits protection Transdu
8. 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 for the 2 input and 4 output channels nm Operating instructions Refer to section 5 for detailed operating instructions 3 3 2 and 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 sec up to 253 units LA4 and 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 flexibility in the required system architecture The computer running NETWORK MANAGER and the units are connected to each other using industry standard CAT5e U FTP cables or higher category fitted with RJ45 connectors Each amplified controller connects to the network via the I O Ethernet sockets located on its rear panel Operating instructions Refer to the LA NETWORK MANAGER video tutorial for detailed operating instructions LA4 UM EN 6 0 WWW L AGOUSTICS COM 13 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 4 INSTALLATION 41 Mounting The LA4 is two rack units high 2U and can be mounted an ElA standard 19 rack see Figure 5 The fo
9. 20 20 21 21 22 22 23 23 26 27 28 29 30 30 32 33 33 34 35 36 36 36 36 37 37 37 38 38 39 39 40 42 43 LA4 UM EN 6 0 WWW L AGOUSTICS COM 7 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 1 PRESENTATION At the heart of the L ACOUSTICS integrated system approach the LA4 and LA8 amplified controllers offer cutting edge loudspeaker amplification DSP network control and comprehensive system protection in a single ergonomic package Based on similar platforms the exceptional and ground breaking performance level delivered by the LA4 and LA8 units allow full optimization of the resources of all L ACOUSTICS systems and deliver outstanding audio quality combined with the best possible transducer protection The LA4 and LAG share the following characteristics 20 lightweight format for high amplified density e A four channel high efficiency amplifier section fed by two inputs ADSP section featuring advanced filter algorithms and an exclusive L DRIVE protection system for the transducers allowing optimum system performance An on board preset library to cover all the principal L ACOUSTICS loudspeaker system configurations e An intuitive and ergonomic user interface fully accessible from the front panel for standalone operation Two Ethernet ports for networking up to 253 LA4 and LA8 units remote monitored by LA NETWORK MANAGER software Windows compatible And the spec
10. AES EBU IN input LA4 UM EN 6 0 WWW L ACOUSTIC S C OM 33 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 5 9 2 FALLBACK MODE An automatic fallback option can be enabled or disabled When enabled and when the AES EBU input mode is selected the amplified controller will automatically switch from digital to analog input in case of digital signal failure 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 digital input 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 digital to analog input he ANALOG inputs must be connected to an audio source playing the same program as the digital audio source connected to the AES EBU input e The level of the digital audio source connected to the AES EBU input must be aligned to the level of the analog audio source using the AES EBU GAIN control see section 5 9 3 Two FALLBACK MODE settings are available as described in the following table Table 7 FALLBACK MODE settings Automatic fallback option disabled The sound will be cut off in case of digita
11. Figure 8 Both LINK connectors are passively wired in parallel on channels A and B see Figure 9 The input impedance is high enough 22 kO balanced to allow multiple parallel input connections IN A AA f analog audio source Lad Ln md ned SS cS x Figure 8 Daisy chaining e audio LA4 UM EN 6 0 WWW L ACDOLSTICS GOM 17 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 Input A Input B Link A In A Link B In B Figure 9 Analog input panel wiring 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 4 4 3 Loudspeaker cabling Loudspeaker system connection Before connecting a loudspeaker system refer to the applicable user manuals for further instructions Four 4 point SpeakON connectors on the rear panel of the LA4 are for loudspeaker connection They are wired as follows see Figure 10 Top left SpeakON connector Pin 14 Oxi Pni OZ3 Pin 24 Bottom left SpeakON connector Out 2 Pin Out 2 Pinte not used not used J Top Left Top Right odi OO OO LAI jal Bottom Left Bottom Right odi C DSP E Hii Figure 10 Output audio paths LA4 UM_EN 6 0 WWW L AGOUSTIGS GOM 18 The table below describes the maximum number of enclosures a
12. 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 The LOAD LED is lit if the corresponding input channel is part of the input selection of at least one output channel see also section 5 2 1 For example in Figure 20 both channel IN A and IN B are selected The top line of the LCD screen indicates the input mode and status of the input channels see also section 5 9 1 For example in Figure 20 IN A and IN B receive an AES EBU signal of 44 1 kHz The bottom line of the LCD screen indicates the group assignation of the corresponding output channel see also section 5 8 For example in Figure 20 channels OUT and OUT 2 are linked by brackets it means that they are assigned to the same group or set of groups if an output channel is assigned to several groups the group name is mult grp OUT 3 is not assigned to any group and OUT 4 is assigned to a group named All 4 UM EN 6 0 WWW L ACOUSTICS COM 25 LAA AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 5 3 2 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 4 Functional
13. Power Supply compatible with mains input nominal voltages of 120 230 V 10 96 LA4 LA4US or 100 200 V 10 96 LA4JP The mains voltage is continuously monitored for under and over voltage as well as for failure in alternating cycles If the mains voltage reaches a value 30 96 below nominal 10 96 above nominal or if it skips about two cycles the SMPS is switched off and the outputs are muted The controller displays Waiting SMPS see the figure on the right A soft start sequence will automatically be engaged as soon as the mains voltage returns to nominal state If the mains voltage reaches a value between 30 96 and 20 96 below nominal the outputs are muted and the controller displays Fuseprotect see the figure on the right Normal operation will resume as soon as the mains voltage returns to nominal state Mains current The SMPS is continuously monitored for current peaks and over current The average mains current can peak temporarily at values several times higher than the nominal value supported by the internal fuse of the controller If the current peaks too frequently the amplitude of the output signals are attenuated by to 6 dB in order to prevent the SMPS fuse from blowing The controller displays Fuseprotect see the figure on the right The protection will automatically be disengaged as soon as the mains current returns to supported conditions If an over current is detected the SMPS is switched off and the
14. controller displays Waiting SMPS see the figure on the right ay A soft start sequence will automatically be engaged when the SMPS returns to nominal state LA4 UM_EN 6 0 WWW L AGOUSTIGS GOM 40 Output channels Output channel temperature The fans associated to the heat sinks operate permanently but as long as the temperature remains below 40 C they run at their slowest speed and can hardly be heard The highest detected temperature controls the speed of the fans Above 40 C the speed is increased until it reaches its maximum value If a temperature of more than 85 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 Hish Temrerature Chx Channel Attenuated If the temperature exceeds 96 C channel x is muted and the controller displays Over Temperature see the figure on the right Over Temperature Chx In both cases the protection will automatically be disengaged when the temperature Channel Muter returns to nominal state Output channel DC voltage The output channels are continuously monitored for sustained presence of DC voltage above a threshold of 3 V If a sporadic DC voltage is detected at output channel x this channel is muted and the controller displays DC see the figure on the right The channel will automatically be unmuted when returning to nominal state DC on Channel Channel Mutec
15. encoder wheel to scroll through the user memories Press the OK key or the encoder wheel to select a user memory or ESC to abort If the controller displays OVERWRITE it means that a preset is already stored the selected user memory Press the OK key or the encoder wheel to validate or ESC to abort VVV If necessary enter a new preset name 16 characters max as follows o Turn the encoder wheel to select the first character o Press the encoder wheel to go to the next character o Repeat these steps until the new name has been entered nm 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 P Press the OK key to validate or ESC to abort The preset is stored and the main screen is displayed TORE USER ENTER PRESET ENTER PRES HAME 181 091 5515_6 001 5818 68 5518 SB STORE USER OVERURITE 010 KIVA 1 KIVA EHTER PEESET ENTER PRESET NAME 3160 SEB18 86H SBIB CB H SE Figure 25 Storing a preset LA4 UM EN 6 0 WWW L ACOUSTIC S C OM 29 LAA AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 5 6 gt vv DELETE PRESET A user preset contained in a user memory 1 10 can be deleted following these steps see Figure 26 From the main menu select DELETE PRESET If the controller displa
16. of a network of controllers and driven by LA NETWORK MANAGER software refer to the LA NETWORK MANAGER video tutorial nm Front panel commands The front panel commands remain accessible if the L NET LED is lit Figure 15 L NET LED lit in green n The L NET LED can also be lit in red or orange Red to indicate that a protection system is activated refer to APPENDIX A PROTECTION SYSTEMS e Orange during the start up sequence refer to section 5 1 to test the two possible colors at once green cred orange LA4 EN 6 0 WWW L AGUOUSTIGS GUM 22 5 3 User interface 5 3 1 Quick access The LA4 offers quick access functions for control front panel locking mute and gain identification and monitoring display of input level input selection input mode and group information Lock Unlock control gt lock the front panel even the mute function and prevent unintentional operation press and hold the IN A and IN B keys simultaneously until Display Locked is displayed on the LCD screen To unlock press and hold the IN A and IN B keys simultaneously until Display Unlocked is displayed on the LCD screen Mute control 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 The quick access mute control is available at all times and positions in the menu tree The key is lit in blue whe
17. operation is not allowed since the controller is driven by NETWORK MANAGER 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 is 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 in the process Continue the procedure gt Press the OK key or the encoder wheel or ESC to abort If the main screen is displayed it means that all group parameters are now reset and all outputs are muted CLEAR GRP PARAMS ARE YOU SURE OPTIONS OUTPUTS MUTED Figure 29 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 and they 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 GRP PARAM 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 a controller is part of a group and to identify its name pressing and holding the IN A or IN B key from the main screen refer
18. single LA4 amplified controller can drive Table 3 Maximum number of enclosures per LA4 Passive 12 Active I2XT ARCS WIDE FOCUS KIVA KILO 5 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 4 4 4 L NET cabling The LA4 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 LA4 to L NET use the Ethernet RJ45 connectors on the LA4 rear panel see Figure 7 L NET cables specifications Connect computer the amplified controllers to the L NET network using straight through Ethernet cables of CAT5e U FTP category or higher and of 100 m 328 ft maximum length Exception If the Auto MDI MDIX functionality is not available on a switch used to build a star or hybrid topology use a crossover cable between the switch and each controller nm Network and cable specifications The L NET network is rated at 100 Mbps A straight through cable has pin of one side connected to pin of the other side pin 2 to pin etc crossover cable has pin pairs 2 and 3 6 crossed The type of a cable can be directly identified comparing the wire colors between its two RJ45 connectors CAT5e U FTP stands for a category 5 unshielded ca
19. 20 V three phase circuit Never try to reproduce a 200 V circuit connecting an LA4JP to two live wires of a 100 V three phase circuit 4 3 3 Circuit breaker b Always interconnect a thermal circuit breaker between the controller and the mains b The circuit breaker current rating depends on the mains voltage rating as follows 6 A for 230 V or 30 A for 120 V LA4 or LA4US 15 A for 200 V or 30 A for 100 V LA4JP LA4 UM EN 6 0 WWW L AGOUSTICS COM 15 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 4 3 4 Electrical generator You must power on the generator before powering on the amplified controllers Verify that the amplified controllers are turned off before powering the generator on Planning the power of the generator in kVA Take the nominal values of the LA4 and Look for the cos of the generator and its recommended operating range Then apply the following formula x U cos x range For instance for LA4 in Europe 16 A and U 230 V With a typical generator cos 0 8 and range 70 Then the generator must be capable of delivering 16 x 230 0 8 x 0 70 6 5 kVA 4 3 5 Power plug The LA4 is supplied with a CEE 7 7 power plug 16 A 250 V grounded The LA4US is supplied with a NEMA L5 30P power plug 30 A 125 V grounded The LA4JP is supplied with the power plug selected by the Japanese distributor Plug connection Strictly apply the specific safety regulations of t
20. 5 3 1 ale Jas Mi AM ai ii i i AEA 5 3 2 Aeres 18 113 Ei A ete 5 3 3 5 4 Beni Gl nd 5 116 Aa Sea O t 5 5 DELETE PRESET aa aaa ia ta aaa a T A as Eia aal Sg RESEPPARAPMEDERS erg cat rec aaa ai EU MM E aia a a aaa lati ai MUR UM at CLEAR GRP PARAMIS r 5 9 SETTINGS ona a a la i 5 9 NEPOT MOE cp 5 9 2 pobre SD M 5 9 3 AES EBU GA e S Be ue crie So a M M HM Oi H HE FREY ARE PRESET EIBRART 5105 MEM er ph hs aaa maaala eee eee E eee MEO DO Beli NETWORK BL C 8 ONDES per Sa SCREENCONTRA Toerien HH 5 11 4 RESET TOFACTORY DEFAULT SETTINGS coser dose MED Fue EE Pu RE APPENDIX A PROTECTION SYSTEMS APPENDIX B APPROVALS APPENDIX C SPECIFICATION LA4 UM EN 6 0 WWW L AGOUSTIGS GOM 6
21. PRESET PARAMETERS menu refer to section 5 7 Identification If the controller is online with LA NETWORK MANAGER it can be identified among other units the workspace refer to the LA NETWORK MANAGER video tutorial P Press and hold the encoder wheel from main screen to launch the Identification function The controller flashes in yellow in LA NETWORK MANAGER While pressing the L NET LED and the output keys flash The controller also displays IDENTIFICATION and the IP address of the unit see Figure 19 IDENTIFICATION 1321684 Figure 19 Launching the Identification function LA4 EN 6 0 WWW L AGUOUSTIGS GUM 24 Input level input selection input mode and group information P Press and hold the ESC or OK key from the main screen The LED meter and the top line of the LCD screen display information about input channels IN A and IN B respectively from left to right see Figure 20 The bottom line of the LCD screen indicates the group assignation of output channels OUT I OUT 2 OUT 3 and OUT 4 respectively from left to right see Figure 20 input level input selection input mode and status output group assignation Figure 20 Pressing ESC or OK The LED SIGNAL to CLIP indicate the level of the signal on the corresponding input channel For example in Figure 20 the signal of channel A has a level of 10 dB and the signal of channel has a level of 20 dB nm
22. SC key to return to the main screen i On the LCD screen two types of arrow cursors indicate how to navigate through the menus see Figure 23 e Position cursors on the left LOAD PST USER Start of a menu Other functionalities can be displayed turning the LOAD PST FACTORY encoder wheel clockwise PSTORE PRESET of a menu Other functionalities can be displayed turning the DELETE PRESET encoder wheel clockwise or counterclockwise PRESET lt gt 7 End of a menu Other functionalities can be displayed turning the CLEAR GRP PARAMS encoder wheel counterclockwise SETTINGS A MONITORING amp INFO 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 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 4 UM EN 6 0 WWW L ACOUSTIC S C OM 27 LAA AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 54 LOAD PST A preset can be loaded from the following menu pages Table 6 LOAD PST pages Pag Memory range Contents O LOAD PST USER 10 read and write User presets stored by the user refer to section 5 5 Factory preset library created by L ACOUSTICS and LOAD PST FACTORY 11 199 read only automatica
23. TORY ARE YOU SURE Press the OK key or the encoder wheel to confirm or ESC to abort The start up sequence is launched refer to section 5 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 nm 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 4 UM EN 6 0 WWW L ACOUSTIC S C OM 39 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 APPENDIX A PROTECTION SYSTEMS The LA4 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 L NET LED also blinks 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 Mains Mains voltage The LA4 amplified controller uses an auto sensing SMPS Switched Mode
24. alue so as to ensure seamless fallback switch from AES EBU to analog inputs in case of fallback mode activation refer to section 5 9 2 The AES EBU GAIN must be set according to the analog audio source s calibration 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 three following examples illustrate the most common cases e If the analog audio source is calibrated at 18 dBu for 0 dBfs set the AES EBU GAIN to 4 dB e If the analog audio source is calibrated at 24 dBu for 0 dBfs set the AES EBU GAIN to 2 dB e If the analog audio source is calibrated at 22 dBu for 0 dBfs or if the fallback option is disabled set the AES EBU GAIN to 0 dB To set the AES EBU GAIN follow these steps see Figure 35 TRES EBU GAIN From the main menu select INPUT SETTINGS and press the OK key or the encoder wheel or ESC to abort Turn the encoder wheel to select AES EBU GAIN 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 gt Turn the encoder wheel to obtain a 0 1 step resolution Press and turn the encoder wheel to obtain a step resolution hold OUTI YN release 5 tAES EBU GAIN HES EBU GHIN 0 Adib 47 BAB 2 Figure 35 Setting
25. ble with foiled twisted pairs Using lower category cables or CAT5e patch cables will result in connection issues The maximum length for a typical CAT5e U FTP cable is 100 m 328 ft This value is indicative and can vary depending on the quality of the cable 4 UM EN 6 0 WWW L AGOUSTICS COM 19 LAA AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 5 OPERATION 5 1 Powering on powering off selecting standby mode P Press the power switch up to power the LA4 on see Figure 1 LA4 goes through a 9 second start up sequence coming with Initializing Controller displayed on the LCD screen and all LED lit for test The LA4 will be ready for use when the main screen is displayed refer to 5 2 1 power switch up Figure Start up sequence gt Press the power switch down to power the LA4 off see Figure 12 LA4 goes through a shutdown sequence coming with Waiting SMPS displayed on the LCD screen and the four LOAD LED lit until complete shutdown na power switch down Figure 12 Shutdown seguence nm 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 The On Off switch does not disconnect the amplified controller from mains nm Standby mode To reduce the electrical consumption and lock the front panel interface the co
26. cers protection Fans Indicators Output Connectors L NET connectors LA4 amp LA4US 120 230 V 10 96 50 60 Hz LA4JP 100 200 V AC 10 96 50 60 Hz Room temperature from 0 C to 50 C Inside controller from 0 C to 85 C temperature monitoring of transformers and heat sinks inrush current limitation mains supply failure and over voltage detection output DC protection output over current protection L DRIVE thermal and over excursion protection 2 fans temperature controlled speed 4 meters including Load Signal Level and Clip LED L NET presence LED 4 mute LED OUTI or OUTI 2 OUT2 gt ves and OUT4 2 x Fast Ethernet RJ45 in out 4 UM EN 6 0 WWW L ACOUS TICS C OM 43 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 ANALOG INPUT Connector Input 2 Neutrik female XLR3 IEC 268 ESD protected Link 2 Neutrik male XLR3 IEC 268 ESD protected 22 balanced impedance Max input level 22 dBu balanced THD 96 Latency 3 9 ms Digital A two cascaded 24 bit A D converters 130 dB dynamic range conversion DIGITAL INPUT with the optional LA AES3 AES EBU input board refer to the LA AES3 product information document PHYSICAL DATA Dimensions H x W x D 88 2U x 483 x 420 mm 3 5 QU x 19 x 16 5 in 433 mm 17 in 76 mm 3 in 465 mm 18 3 in BH ggg uw 76 mm 3 in E E o Ld Weight 1 1 kg 24 5 Ib Fi
27. composed of one 4 channel set SR SB SB SB for 4 subwoofers in cardioid configuration dE L Two 2 channel sets One 4 channel set LF HF LF HF SR SB SB SB Figure 27 Channel sets To set the preset parameters follow these steps see Figure 28 From the main menu select PRESET PARAMETERS Turn the encoder wheel to select a preset parameter 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 Release the key Repeat the procedure for each value to be set Press ESC to return to the main menu LA4 UM EN 6 0 WWW L rAGOUSTIGS G OM 30 If necessary all preset parameters including the preset name can be reset to default values following these steps see Figure 28 Turn the encoder wheel to select RESET PRESET P Press the OK key or the encoder wheel two times ESC to abort hold OUT3 tDELRV B TFOLBEITS x same sequence as for GAIN SELECTION lt gt TRESET PRESET 2 YOU SURE OUTPUTS MUTED Figure 28 Setting the preset parameters nm Value ranges Gain values are adjustable between 60 dB and 15 dB Delay values are adjustable from 0 to 680 ms 65280 samples 233 5 m 765 9 ft at 20 C Refer to section 5 11 2 for delay unit setting nm Value setting resolution Turn the encoder whee
28. e 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 gt From the main menu select OPTIONS and press the OK key or the encoder wheel or ESC to abort P Press the key or the encoder wheel to enter the NETWORK ADDRESS page or ESC to abort Turn the encoder wheel to select a value for the last byte Value setting resolution Turn the encoder wheel to obtain a step resolution Press and turn the encoder wheel to obtain a 0 step resolution P Press the key to validate the setting or ESC to abort For example in Figure 37 the IP address has been modified from 192 168 1 110 to 192 168 1 123 i 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 P Long click on the key located just below the number to modify until it is selected gt Turn the encoder wheel to select a new value and press the OK key to validate P Repeat the procedure for all numbers to modify 5 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 tempera
29. ections from 5 1 1 1 to 5 11 4 2 METWOEK HDDEESS NETWORK ADDRESS 122 100 1 119 92 168 121254 192 1 RK ADDRESS l i tDELRV UNIT DELAY UNIT tOELAY UNIT METERS lt METERS TSCREEN SCREEN CONTRAST TSCREEN CONTRAST 1984 gt S AS TRESET FACTORY lt gt RESET AMF TO FACTORY DEFAULT SETTINGS ARE YOU SURE Figure 37 OPTIONS menu page LA4 UM_EN 6 0 WWW L ACOUS TICS C OM 37 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 5 11 1 NETWORK ADDRESS Remote control of amplified controllers requires setting up a private local area Ethernet network to interconnect up to 253 units 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 etc 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 th
30. hdrawn from use as it can cause severe electrical shock if connected to an AC outlet LA4 UM EN 6 0 WWW L AGOUSTIGS GOM 2 20 21 22 23 24 25 26 Lightning storm During lightning storms disconnect the product from the mains Switching the product off does not disconnect it from the mains To do this remove the plug from the mains outlet Interconnections When connecting the product to other equipment mute all output channels Carefully read the user manual of the other equipment and follow the instructions when making the connections Do not connect a speaker output in parallel or series with any other amplifier output Do not connect the speaker outputs to any other voltage source such as a battery mains source or power supply regardless of whether the product is turned on or off Over power risks The product 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 level is high enough Operating temperature The product operates at a room temperature between 0 and 50 Ventilation Openings in the product chassis are for ventilation They prevent the product from overheating and thus ensure reliable operation These openings must not be blocked or covered The product must be installed in accordance with the instructions given in this manual Heat Do not operate
31. he country of use Verify that the plug conforms to the specific voltage and current rating given in Table l Do not disable the ground connection of the supplied AC power cord using an adaptor or any other methods If the power plug does not match the local power outlet it can be cut off and wired to a suitable plug refer to the LA4 maintenance manual level 4 3 6 Power consumption The LA4 power requirements depend on the load impedance and the signal level as indicated the following table Table 2 LA4 mains input power and current draw Maximum output power Mains input power and current draw Number of driven FOWCUIPEE 1 5 output 1S output IDLE Standby channels annei power 5 dB power 9 dB 1000 W 22 A 3250 W 12 A 1600 W 0 3A lt 0 1 A 800 W 17 2550 W 9 1350 80 W 12 W The current values are given for a mains rated at 230 V Multiply by 2 for 120 V 1 15 for 200 V and 2 3 for 100 V If the voltage outsides a plus or minus 10 96 range the maximum power is no longer guaranteed 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 4 3 7 Example of heat power calculation Connect a 4 Q load to each out
32. ific features of each unit are the following e The LA4 delivers up to 4 x 1000 watt into 4 ohm The LAS delivers up to 4 x 1800 watt into 4 or 2 7 ohm e AES EBU input card is integrated to the LAG for digital audio implementation This feature is available as an option on the LA4 TheLA8 includes all current factory presets while the LA4 only includes presets of LA4 type output connectors are SpeakON for the LA4 and CA COM SpeakON for the LAB The unique ensemble of on board features and the addition of peripherals are all offered in a secured and standardized environment This approach simplifies system setting and operation with the benefit of superior and predictable audio results across the entire product range Driving four amplified output channels through a DSP offers a wide range of options when it comes to sound system configuration The LA4 and LA8 on board preset libraries allow the sound engineer a high degree of flexibility in choosing the enclosure models and the system configuration for a specified application The factory preset libraries are derived from 6 basic system templates 3 way active mono quad amplified e cardioid subwoofer mono e 2 way active stereo e passive stereo e hybrid active subwoofer mono hybrid passive subwoofer stereo LA4 UM EN 6 0 WWW L AGOUSTIGS GOM 8 2 SYSTEM COMPONENTS The system approach developed by L ACOUSTICS consists in offering a global solu
33. ional user presets the flash memory offers a quick access to all the usual L ACOUSTICS speaker system configurations refer to the LA PRESETS GUIDE DEL E Array Morphing multi band EO IN B DEL 4 Array Morphing multi band EQ H pe Array Morphing multi band EQ DEL d Array Morphing multi band EQ am mm e m i a Q can be set from NETWORK MANAGER only x 3 be set from LA NETWORK MANAGER and the 4 interface x locked 4 can be managed groups X L ACOUSTICS parameters IIR filters Bessel BTW LR Over excursion Thermal protection protection FIR filters zero phase shift Figure 4 Audio path parameters UM EN 6 0 WWW L rAGOUSTIGS G OM 12 3 2 4 Amplifier section and power supply The LA4 amplifier section uses a Class H technology supporting the very wide dynamic range found in live audio productions The 4 channels can deliver up to 4 x 1000 watt into 4 ohm yielding perfect power matching to each individual L ACOUSTICS loudspeaker system The auto sensing SMPS Switched Mode Power Supply offers better stability by associating two symmetrical power supplies 3 2 5 Speaker output The 4 features four 4 point SpeakON connectors for loudspeaker outputs 3 3 Monitoring and control 3 3 1 User interface The front panel user interface provides see Figure
34. is adjusted to the dynamic and thermal capacity of each individual transducer 4 UM EN 6 0 WWW L ACOUSTICS COM 41 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 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 product nameLA4 amplified controller October 22 2009 Is in conformity with the provisions of 2006 95 EC Low Voltage Directive 2004 108 EC Electro Magnetic Compatibility Directive Applied rules and standards Christophe PIGNON EN60065 Safety requirements for audio video and similar Research amp Development Director electronic apparatus EN55103 1 Electromagnetic Interference Emission EN55103 2 Electromagnetic Susceptibility Immunity Additional approvals The LA4 amplified controller has been CB CCC and cTUVus certified It also complies with EMC and RoHS directives The main standards tested were Safety requirements IEC 60065 2001 7 Edition Al 2005 EN 60065 2002 1 2006 09 09 2008 UL 60065 2003 RI 1 06 CSA C22 2 60065 2003 A1 06 K60065 GB8898 2001 EN 55103 1 1996 5 and EN 55103 2 1996 El E5 FCC FCC 47 CFR Part 15 Korea EN 55013 2001 2003 2 2006 00013 2006 EN 55020 2002 A1 2003 00020 2003 China GB17625 1 2003 and GB13837 2003
35. ities 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 Figure 21 ACCESS ENTER PIN LOCKED Figure 21 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 Figure 22 Press and hold the OUTI key or press the ESC key to abort Turn the encoder wheel to select the first digit of the PIN code Release the OUTI key Repeat the procedure for keys OUT2 to OUT4 and their associated digits Press the OK key If the controller displays ENTER PIN it means that the PIN code is wrong Repeat the procedure to make corrections or press the ESC key to abort Else the functionality is displayed and can be accessed until you leave the current menu press OUTI ENTER Figure 22 Entering code Disabling the protection n The lock PIN code protection can only be disabled from LA NETWORK MANAGER by entering the password defined for the specific amplified controller refer to the LA NETWORK MANAGER video tutorial UM EN 6 0 WWW L rAGOUSTIGS C OM 26 5 33 Main menu The main menu gives access to the pages described in the following table Please refer to the appropriate sections for detailed inst
36. l signal failure but it will automatically be recovered when the signal has returned to normal state Automatic fallback option enabled The ANALOG inputs will automatically be selected in case of digital signal failure on the AES EBU inputs Revert to AES EBU is not automatic and must be done manually by the user To select the fallback mode follow these steps see Figure 34 From the main menu select INPUT SETTINGS and press the OK key or 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 VVV Press the OK key or the encoder wheel to validate the setting or ESC to abort D Be TFHLLBHCK MODE a FALLBACK MODE tFALLBACK MODE OFF OFF lt OM pt Figure 34 Selecting the fallback mode nm Invalid audio validity bit A validity bit at non audio value will not trigger the automatic fallback Instead the signal will be muted LA4 UM EN 6 0 WWW L AGOUSTIGS GOM 34 5 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 by 0 1 dB steps It must be used when the fallback mode is enabled a digital audio source is connected to AES EBU input and an analog audio source is connected to the ANALOG inputs The AES EBU GAIN allows aligning the digital audio source level to the analog level v
37. l to obtain fine resolution last digit P Press and turn the encoder wheel to obtain coarse resolution second to last digit Total delay m 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 680 ms nm 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 along with settings to a user memory refer to section 5 5 4 UM EN 6 0 WWW L ACOUSTICS COM 31 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 5 8 CLEAR GRP PARAMS The group parameters name gain delay and contour EQ defined in LA NETWORK MANAGER refer to the LA NETWORK MANAGER video tutorial can be cleared n Group and preset parameters The group parameters apply to a set of amplified controllers that are part of a group while the preset parameters apply to a single amplified controller refer to section 5 7 The CLEAR GRP PARAMS function only clears the group parameters and does not clear the preset parameters To clear the group parameters follow these steps see Figure 29 Clearing the group parametersFigure 29 gt From the main menu select CLEAR GRP PARAMS gt 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
38. lly installed during firmware update refer to the LA NETWORK MANAGER video tutorial To load a preset follow these steps see Figure 24 gt From the main menu select LOAD PST USER or LOAD PST FACTORY If the controller displays NO PRESETS AVAILABLE when you select LOAD PST USER it means that all user memories are empty Press the ESC key to abort END Else continue the procedure Turn the encoder wheel to scroll through the presets P Press the key or the encoder wheel to select a preset or ESC to abort The controller displays ARE YOU SURE P Press the OK key or the encoder wheel to validate or ESC to abort If the controller is not assigned to a group refer to section 5 8 or is connected to L NET refer to section 5 2 3 the preset is activated and the main screen is displayed If the controller displays CLEAR GROUP PARAM it means that it has been assigned to a group refer to section 5 8 but it is no longer connected to L NET refer to section 5 2 3 Press the OK key to clear the group parameters or press the ESC key to keep the group parameters active E LOAD PRESET KIVA a11 kKIUB LOAD PRESET 5618 PRESET 475 SB18 680 ARE YOU SURE Esclo LOAD PRESET FLAT 2 a9272 FLHT LBR4 CLEAR GROUP OK HAAS AE 118 OUTPUTS MUTED SB_A SB B SB_E group parameters cleared 625 SB18 68 119 56 6 group parameters still active Figure 24 Loading a
39. n the corresponding output channel is muted and not lit when unmuted nm Outputs are muted in all factory presets The gain can be set before unmuting Gain control Gain can be controlled quick access mode simultaneously for all output channels fed by the same input following these steps gt From the main screen press and hold the chosen output key The LCD displays the gain values of all channels having the same routing as the selected channel Turn the encoder wheel to set the gain values and simply release the key to return to the main screen MUTE OUT UM OM Figure 16 Unmuting OUT I GHIM OLIT cdB Lew Figure 17 Setting the OUT 3 gain 4 UM EN 6 0 WWW L ACOUSTICS COM 23 LAA AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 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 simultaneously press and turn the encoder wheel Examples of output channels routed to the same input see Figure 18 e Pressing OUTI will select OUTI OUT3 and containing tINFUT SELECTION j i oF A B e Pressing OUT2 will select OUT2 OUT3 and OUT4 containing Pressing OUT3 or will select all channels containing and Figure 18 Multiple routings Individual gain settings are available from the
40. nish black and anthracite gray LA4 UM EN 6 0 WWW L AGOUSTICS COM 44 Document reference LA4 UM EN 6 0 Distribution date February 18 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
41. nt them directly on top of each other or close any open space in the rack with blank panels 4 3 Connecting to AC mains 4 3 mains specifications b Only connect the LA4 CE type LA4US US type to AC power outlet rated 230 V 16 A 50 60 Hz or b 120 V 30 50 60 Hz Only connect the LA4JP Japan type to an AC power outlet rated 100 V 30 A 50 60 Hz or 200 V 15 A 50 60 Hz To plug the controller to a mains only use an outlet fitted with a pin tied to ground Do not defeat the ground pin of the outlet as it connects the controller to earth If the local mains does not conform to the power requirements or is unsure consult an electrician The following table gives the LA4 power data in nominal use 4 1 8 of maximum output power refer to section 4 3 6 Table LA4 power supply data in nominal use Voltage V Frequency Hz Current A 120 230 LA4 LA4US 50 60 22 12 100 200 LA4JP 50 60 26 14 If the mains voltage value increases up to more than 142 V the amplified controller will automatically switch to the 230 or 200 V mode If the mains voltage value decreases down to less than 132 V the amplified controller will automatically switch to the 120 or 100 V mode 4 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 LA4 or an LA4US to two live wires of a 1
42. ntroller can be put in standby mode from LA NETWORK MANAGER refer to the LA NETWORK MANAGER video tutorial Standby Mode will be displayed on the LCD screen while the controller is in standby mode It is possible to cancel the standby mode from LA NETWORK MANAGER or from the LA4 front panel interface gt push and hold the encoder wheel for one second UM EN 6 0 WWW L rAGOUSTIGS G OM 20 5 2 Display 5 2 1 Main screen Once the start up sequence has fully cycled refer to section 5 1 the LCD displays the main screen 2 3 4 25 lt fame CE SE H Figure 13 Main screen Preset memory number to 255 Memory space containing the current preset The preset can be a user preset or come from an on board preset library refer to section 5 4 2 Presetname Copied from a preset library or entered by the user if prior stored as a user preset 3 Last number in the IP address 1 to 254 Identifies the controller within the L NET network refer to section 5 11 1 4 Star sign Indicates that parameters have been modified after the preset was last stored refer to section 5 5 5 Output name and routing Label placed above each output key written in the xx_x format where e 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 way loudspeaker encl
43. o service this product as removing covers may expose to dangerous voltage or other hazards The use of unauthorized replacement parts may result in injury and or damage through fire electric shock or other electricity related hazards All service and repair work must be carried out by an L ACOUSTICS authorized dealer Shipping Use the original packaging for shipping the product unless it is mounted in a rack with the front and rear panels fixed to the rack as described in this manual LA4 UM EN 6 0 WWW L AGOUSTICS COM 3 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 SYMBOLS INDICATED ON THE PRODUCT The product is potentially life threatening if open Never attempt to remove the back cover CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN The lightning flashes symbols next to the SpeakON connectors indicate that the product can generate high output voltages that are potentially life threatening Always use ready made leads to connect the product to speakers Never touch any exposed speaker wires while the product is operating without first disconnecting the wires from the product SYMBOLS The following symbols are used in this document DANGER At 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 HAZARD This symbol indicates a potential
44. og link ports is ESD protected and equipped with one XLR3 male connector To be processed by the DSP the analog signal needs to be converted into a digital signal For this purpose the LA4 amplified controller is fitted with two cascaded 24 bit A D converters with a sampling rate of 96 kHz allowing an encoding dynamic range of 130 dB 3 2 2 AES EBU digital input A slot located on the rear panel is designed to accept the optional L ACOUSTICS LA AES3 AES EBU input board refer to the LA AES3 user manual 4 UM EN 6 0 WWW L ACDOLSTICS CGOM 11 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 3 2 3 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 The DSP engine is a 32 bit floating point DSP at 96 kHz sampling rate offering an enhanced dynamic range since it does not generate calculation clips like a fixed point DSP e Adedicated engineering approach combining IIR and FIR filters generates perfectly linearized phase curves and significantly improved impulse responses e The 2x 4 matrix architecture offers flexibility for various system configurations e The L DRIVE transducer protection system offers advanced protection by monitoring both excursion and temperature of the transducer e With a complete factory preset library and the possibility of creating addit
45. osure HF high frequency transducer section part of a 2 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 last character indicates which input channel or input channel combination is selected to drive the output channel INA IN B sum of IN A and IN B A B difference between IN A and IN B A B WwW LA4 UM_EN 6 0 WWW L ACOUS TICS C OM 21 LAA AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 5 22 LED meters Four LED meters are located on the front panel above the LCD screen see Figure 14 Figure 14 The four LED meters By default the LED meters monitor the state of the four output channels via six LED LOAD The green LOAD LED is lit when a load is connected and when the output module delivers a minimum of 0 8 SIGNAL green SIGNAL LED is lit when a signal is detected at the corresponding output of the amplified controller and when the output voltage reaches 100 mV dB The green 25 dB 10 dB and 5 dB LED are lit when the output voltage reaches respectively 25 dB 10 dB and 5 dB below the maximum level CLIP The red CLIP LED is lit when the output voltage reaches the maximum level 5 2 3 L NET LED The L NET LED is lit in green see Figure 15 when the LA4 is part
46. preset example with a factory preset SB H SB H SB B Complements about the LOAD 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 P Press and hold the encoder wheel to display the original name When returning to the main screen the preset names containing more than characters are not fully displayed and are followed by ellipsis Turn the encoder wheel to display the full name for 2 seconds UM EN 6 0 WWW L rAGOUSTIGS G OM 28 5 5 STORE PRESET The current preset and the possible setting modifications can be stored to a user memory I 10 Modifications flag The modifications of the preset parameters are indicated by a star sign on the top right corner of the LCD screen until the preset has been stored to a user memory or set to its initial settings A There is a risk of loosing the preset parameter modifications Preset parameter modifications refer to section 5 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 Figure 25 gt From the main menu select STORE PRESET Turn the
47. put channel of the LA4 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 LA4 According to Table 2 the LA4 power consumption is 1600 W the heat power produced is then 1600 500 1100 W difference between power consumption and output power LA4 UM EN 6 0 WWW L AGOUSTIGS GUM 16 4 4 Audio and network cabling 4 4 Connection panels The 4 rear side features three connection panels see Figure 7 ANALOG for analog audio distribution L NET for remote control with LA NETWORK MANAGER software and SPEAKER output An AES EBU digital audio distribution panel is also available as an option with the LA AES3 board refer to the LA AES3 user manual ANALOG L NET AES EBU Figure 7 LA4 rear connection panels 4 4 2 Analog audio cabling The analog XLR connectors on the LA4 are wired according to IEC 268 pin shield pin 2 signal pin 3 signal Two 3 point female XLR input connectors IN A and IN B are provided for the LA4 to receive two analog signals 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 two 3 point male XLR connectors LINK A and LINK B feed the input signals to the next unit in the signal chain see
48. 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 see Figure 31 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 see Figure 31 right indicates a faulty digital signal leading to sound cut INPUT MODE IMPUT MODE e HES EGU TIR HES EBU UNLOCK Figure 31 LOCK WARN and UNLOCK statuses Sound cut can be avoided using the FALLBACK MODE on the AES EBU IN input and a backup audio source connected to the ANALOG inputs refer to section 5 9 2 In case of UNLOCK status the ANALOG input will automatically be selected leading to one of the screens of Figure 32 AN FBACK indicates that the amplified controller has switched to analog fallback The text displayed on the right UNLOCK LOCK WARN or LOCK 44k l informs the user about the status of the AES EBU audio source LIMPFUT MODE T LIHPUT MODE gt LIMPUT MODE e AH FERCK LOCK WARN HH FERCK LOCK 44k1 Figure 32 FALLBACK statuses When the LOCK status has been recovered the user can manually reactivate the AES EBU input applying the sequence described in Figure 33 INPUT MODE INPUT MODE INPUT MODE e AN FBACK LOCK 44k1 PHES EBU lt LOCK 44k 1 AES EBU LOCK 44k1 Figure 33 Reactivating the
49. risk of electrical 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 LA4 UM EN 6 0 WWW L AGOUSTIGS GOM 4 WELCOME TO L AcOUSTICS Thank you for choosing the L ACOUSTICS LA4 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 CONTENTS PRESENTATION 8 2 SYSTEM COMPONENTS 9 2 1 and driving Syste Nie ur pita pne dur sedtnee eea nb dispensa E aaa dates tati a 9 2 2 Loudspaaker enclosures and GABIES pco etas Gates 9 2 3
50. ructions 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 Page Functionalities LOAD PST USER load a user preset memories 1 10 LOADPSTFACTORY PST FACTORY load a factory preset memories 11 199 STORE PRESET save the current preset including the current settings as a user preset memories I 10 DELETE DELETEPRESET delete a user preset memories 1 10 PARAMETERS set the gain delay polarity and routing parameters CLEAR GRP PARAMS remove the group parameters defined in LA NETWORK MANAGER 58 software name gain delay and contour EQ INPUT SETTINGS set the input mode fallback mode and AES EBU gain with the 59 optional LA AES3 board l display real time measured values RMS output voltage and output temperature in percentage of the maximum values MONITORING amp INFO i A A 5 9 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 and LCD screen contrast reset all parameters to factory defaults To select a menu page follow these steps see Figure 23 P Press and release the encoder wheel Turn the encoder wheel clockwise or counterclockwise to scroll through the page names P Press the key or the encoder wheel to select a page or press the E
51. the AES EBU GAIN 4 UM EN 6 0 WWW L ACOUSTIC S C OM 35 LAA AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 5 10 MONITORING amp 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 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 e Display the controllers MAC address Figure 36 shows all pages of the MONITORING AND INFO menu Each one is detailed in sections from 5 10 1 to 5 10 5 5 HA TOUT CH TEMP 4 44 42 U2 1 8 8 TPRESET LIBRARY 4 0 tMAC ADD 16 92 Figure 36 MONITORING amp INFO menu page 5 10 1 SPK HANDLING 96 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 36 the RMS voltage of channels OUT to OUT 4 is respectively 12 10 13 and 96 of the maximum values 5 10 2 OUT CH TEMP 96 This page displays the temperature of each individual amplifier channel circuit as a percentage of the ma
52. the product near any heat source such as radiators or other devices Water and moisture To prevent fire or shock hazard do not expose the product to rain or moisture Do not use the product near water Do not operate the product while wet Interference with external objects and or liquids Never push objects of any kind into the product through openings as they may touch dangerous voltage points or short out parts that could result in a fire or electric shock Never spill liquid of any kind on the product Cleaning Unplug the product from the mains before cleaning Do not use liquid or aerosol cleaners Clean only with dry cloth Mounting instructions Do not place the product on an unstable cart stand tripod bracket or table The product may fall and be seriously damaged and may cause serious human injury Any mounting of the product should follow the manufacturer s instructions given in this manual and should use accessories recommended by the manufacturer Conditions which require immediate service Refer all servicing to qualified service personnel Servicing is required when the product has been damaged in any way such as Power supply cord or plug is damaged e Liquid has been spilled or an object has fallen into the product e The product has been exposed to rain or moisture e The product was dropped or the housing is damaged e The product does not operate normally Servicing and replacement parts Do not attempt t
53. tion 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 LA4 are the following 2 1 Powering and driving system LA4 Amplified controller with DSP preset library and networking capabilities 2 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 2 3 Rigging element Refer to the rigging manuals of the loudspeaker systems for detailed instructions about the rigging of the enclosures 2 4 Software application SOUNDVISION Proprietary acoustical and mechanical 3D modeling software LA NETWORK MANAGER Remote control and monitoring of amplified controllers nm Using L ACOUSTICS software Refer to the SOUNDVISION user manual and the LA NETWORK MANAGER tutorial SOUNDVISION Figure 1 Main components involved in loudspeaker system design and drive LA4 EN 6 0 WWW L ACOUSTICS COUM 9 4 AMPLIFIED CONTROLLER USER MANUAL VERSION 6 0 3 LA4 AMPLIFIED CONTROLLER 34 Main features 3 1 1 Front and rear panels 2 3 4 25 47714 7 unn miwul
54. to section 5 3 1 LA4 UM_EN 6 0 WWW L AGOUSTIGS GOM 32 5 9 INPUT SETTINGS 59 1 INPUT MODE This function allows selecting the physical input connector according to the audio source feeding the amplified controller e An analog audio source connects to the IN A and or IN B inputs of the ANALOG panel see Figure 7 In this case activate the analog inputs selecting the ANALOG input mode e A digital audio source connects to the AES EBU IN input of the AES EBU panel see Figure 7 This feature is only available with the optional LA AES3 AES EBU input board refer to the LA AES3 user manual To select the input mode follow these steps see Figure 30 gt From the main menu select INPUT SETTINGS and press the OK key or the encoder wheel or ESC to abort Turn the encoder wheel to select ANALOG or AES EBU P Press the OK key or the encoder wheel to validate the setting or ESC to abort ea INPUT MODE 2i INFUT MODE TIHMFUT MODE ANALOG HHALOG lt AES EBU LOCK 44k1 Figure 30 Selecting the input mode In Figure 30 the AES EBU input mode has been enabled LOCK 44 is a status message indicating that the AES EBU input mode is active and that the digital audio source provides signals of sampling freguency 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
55. ture of 20 C To select the delay unit follow these steps From the main menu select OPTIONS and press the OK key or the encoder wheel or ESC to abort Turn the encoder wheel to select DELAY UNIT 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 Vv vV VvV wv Press the key or the encoder wheel to validate the setting or ESC to abort For example in Figure 37 the delay unit has been modified from ms to METERS LA4 UM EN 6 0 WWW L AGOUSTIGS GOM 38 5 11 3 SCREEN CONTRAST To set the LCD screen contrast follow these steps VVV From the main menu select OPTIONS and press the OK key or the encoder wheel or ESC to abort Turn the encoder wheel to select SCREEN CONTRAST Press the OK key or the encoder wheel to enter the page or ESC to abort Turn the encoder wheel to select a value between 0 and 100 96 Press the OK key or the encoder wheel to validate the setting or ESC to abort For example in Figure 37 the screen contrast has been modified from 100 to 30 5 11 4 RESET TO FACTORY DEFAULT SETTINGS To reset the amplified controller to its factory default settings follow these steps see Figure 37 From the main menu select OPTIONS and press the OK key or the encoder wheel or ESC to abort Turn the encoder wheel to select RESET TO FACTORY DEFAULT SETTINGS The controller displays RESET TO FAC
56. ur points on the front panel are for rack mounting Use four screws and washers to mount the controller to the rack front rails 433 mm I7 in 76 mm 3 in e ll 1 hi 465 mm 18 3 in 76 mm 3 in yl 8 E 2 n 406 mm 16 in mm 3 5 in 7 6 mm 0 3 in Figure 5 LA4 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 addition to the front panel mounting Use the rear rack support brackets provided with the controller as shown in Figure 6 Any mechanical damage to the controllers used in portable applications without rear support will covered by warranty not be 486 mm 19 1 in 400 mm 15 7 in pee Figure 6 LA4 with rear rack support brackets LA4 UM EN 6 0 WWW L AGUOLUSTIGS CUM 4 2 Cooling To maintain a low and even operating temperature the LA4 contains two fans providing front to rear airflow Instructions for proper ventilation Do not block the front and rear ventilation grills on a controller Ensure that the front filter is clean and dust free If the controller is rack mounted e Do not block the ventilation grills with front or back panels or doors If not possible use a forced ventilation system and verify that the open area at the back is at least of 140 cm per controller e When stacking more than one controller in a rack mou
57. ximum operating temperature 85 C 100 96 For example in Figure 36 the temperature of channels OUT to OUT 4 is respectively 44 42 43 and 42 96 5 10 3 FIRMWARE This page displays the version of LA4 firmware in use in the controller For example Figure 36 shows LA4 firmware version 2 1 0 0 Network Always ensure that all LA4 amplified controllers used in a given network run the same firmware version UM EN 6 0 WWW L rAGOUSTIGS G OM 36 5 10 4 PRESET LIBRARY This page displays the version of the preset library in use in the controller For example Figure 36 shows preset library version 4 0 nm PRESET LIBRARY description Refer to the PRESET GUIDE for full description of the factory presets 5 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 36 the MAC address is 00 1B 92 01 02 1B 5 11 OPTIONS This menu allows setting the amplified controller s general parameters These parameters are the following e IP address delay unit ms meters feet or samples e LCD screen contrast An additional function allows resetting the amplified controller to its factory default state Figure 37 shows all pages of the OPTIONS menu Each one is detailed in s
58. ys NO PRESETS AVAILABLE it means that all user memories are empty Press the ESC key to abort END Else continue the procedure Turn the encoder wheel to scroll through the user presets Press the OK key or the encoder wheel to select a preset or ESC to abort The controller displays ARE YOU SURE 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 HELETE USER PRESET DELETE USER PRESET HALNY SBEB18 868 YOU SURE DELETE USER PRESET ain KIVA 5 7 Figure 26 Deleting a user preset PRESET PARAMETERS The preset parameters gain delay polarity and routing 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 user preset parameters are common to all channels On the LCD screen the channel sets are indicated by brackets displayed above the corresponding output channel keys For example Figure 27 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

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