L-Acoustics LA4X, User Manual

Page 1: ...LA4X Amplified Controller user manual VERSION 4 0 www l a cousti cs co m...

Page 2: ...ided for your safety If the provided 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 particul...

Page 3: ...to an AC power outlet rated 100 240 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 I construction shall be connected to a mains sock...

Page 4: ...allation 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...

Page 5: ...ower supply and amplifier section 12 2 2 4 Speaker outputs 12 2 3 Monitoring and control 12 2 3 1 User interface 12 2 3 2 L NET remote control network 12 3 INSTALLATION 13 3 1 Mounting 13 3 2 Ventilat...

Page 6: ...ELETE PRESET 31 4 7 PRESET PARAMETERS 32 4 8 CLEAR GROUP PARAMS 33 4 9 INPUT SETTINGS 34 4 9 1 INPUT MODE 34 4 9 2 FALLBACK MODE 35 4 9 3 AES EBU GAIN 36 4 10 MONITORING AND INFO 37 4 10 1 SPK HANDLIN...

Page 7: ...his approach brings maximum discretization with a one to one link processing amplification transducer section CONVENTIONAL For applications requiring a high count of loudspeaker enclosures with optimi...

Page 8: ...4 Software LA NETWORK MANAGER Remote control and monitoring of amplified controllers SOUNDVISION 3D acoustical and mechanical modeling Software documentation Refer to the LA NETWORK MANAGER video tuto...

Page 9: ...terface and a Fast Ethernet device for network remote control 2 1 2 Front and rear panels Figure 2 LA4X front and rear panels Status LED 1 LED meters 2 LIMIT CLIP level audio level 20 10 5 dB SIGNAL p...

Page 10: ...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...

Page 11: ...roach combining IIR and FIR filters generates perfectly linearized phase curves and significantly improved impulse responses The 4 x 4 matrix architecture offers flexibility for various system configu...

Page 12: ...monitoring functionalities via the LED display signals presence and level and the LCD screen system parameters Instant access to navigation and parameters control using the encoder wheel and the six...

Page 13: ...troller to the rack front rails 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 su...

Page 14: ...to an AC power outlet rated 100 240 V 50 60 Hz with the following current values 20 A for 100 120 V 10 A for 200 240 V The LA4X must be connected to a mains socket outlet with a protective connection...

Page 15: ...l 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 Load Number of driven channels Power per channel 1 3...

Page 16: ...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 1 for input mode selection...

Page 17: ...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 th...

Page 18: ...lanced 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 sin...

Page 19: ...AKER 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 1 Out 1 Pin 1 Out 3 Pin 1 Out 1 Pin 1 Out...

Page 20: ...8 KARA 2 4 KUDO 1 1 K2 1 1 Subwoofers SB15m 1 4 SB18 1 4 For passive loudspeakers the value corresponds to the number of enclosures in parallel on the output For active loudspeakers the value correspo...

Page 21: ...see Figure 12 Although it cannot be detected anymore over the network the controller still transmits Ethernet data in a daisy chain topology Figure 12 LA4X turned off Power loss If the power has been...

Page 22: ...aced above each output key written in the xx_x format where The first two characters indicate the type of transducer section or enclosure to be connected to the output channel LF low frequency transdu...

Page 23: ...oller 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...

Page 24: ...Display Locked is displayed on the LCD screen see Figure 17 To unlock press and hold the ESC and OK keys simultaneously until Display Unlocked is displayed on the LCD screen Figure 17 Locking the fro...

Page 25: ...1 dB resolution simultaneously press and turn the encoder wheel Examples of output channels routed to the same input see Figure 20 Pressing OUT1 will select OUT1 OUT3 and OUT4 containing A Pressing OU...

Page 26: ...IP 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 pa...

Page 27: ...ximum values display the firmware and factory preset library versions display the controller s MAC address 4 10 OPTIONS set the controller s IP address set the delay unit LCD screen contrast and light...

Page 28: ...e LCD screen displays ACCESS LOCKED or ENTER PIN see 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...

Page 29: ...aded 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 sec...

Page 30: ...n 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...

Page 31: ...se continue the procedure Turn the encoder wheel to scroll through the user presets 2 Press the OK key or the encoder wheel to select a preset or ESC to abort 3 The controller displays ARE YOU SURE Pr...

Page 32: ...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 Figure 29 Channel sets To set the preset parameter...

Page 33: ...om the main menu select CLEAR GROUP PARAMS 1 Press the OK key or the encoder wheel or ESC to abort 2 If the controller displays L NET ACTIVE CANNOT CLEAR it means that the operation is not allowed sin...

Page 34: ...U 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 connect...

Page 35: ...ital audio source connected to input pair AB 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...

Page 36: ...input signal of 22 dBu The three following examples illustrate the most common cases If the analog audio source is calibrated at 18 dBu for 0 dBfs set the AES EBU GAIN to 4 dB If the analog audio sour...

Page 37: ...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...

Page 38: ...ectively 52 53 50 and 48 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 a...

Page 39: ...ers are the following IP address delay unit ms meters feet or samples LCD screen contrast LED and LCD screen backlight mode An additional function allows resetting the amplified controller to its fact...

Page 40: ...main menu select OPTIONS and press the OK key or the encoder wheel or ESC to abort 1 Press the OK key or the encoder wheel to enter the NETWORK ADDRESS page or ESC to abort 2 Turn the encoder wheel to...

Page 41: ...der wheel to validate the setting or ESC to abort 5 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...

Page 42: ...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 r...

Page 43: ...lar electronic apparatus EN55103 1 Electromagnetic compatibility Product family standard for audio video audio visual and entertainment lighting control apparatus for professional use Part 1 Emissions...

Page 44: ...ad Nb of driven channels Power per channel 1 3 Output Power 5 dB 1 8 Output Power 9 dB IDLE Standby 4 or 8 4 1000 W 7 A 1600 W 3 A 750 W 0 26A 60 W 0 1 A 11 W Current values given for a mains rated at...

Page 45: ...mic range DIGITAL INPUT DATA Supported input formats Standard AES EBU AES3 or coaxial S PDIF IEC 60958 Type II Sampling frequency Fs 44 1 48 64 88 2 96 128 176 4 or 192 kHz Word length 16 18 20 or 24...

Page 46: ...erence LA4X_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 expres...