L-Acoustics LA8 User Manual

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LA8 AMPLIFIED CONTROLLER

USER MANUAL

VERS ION 5.0

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Summary of LA8

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La8 amplified controller user manual vers ion 5.0 w w w .L - acou s ti cs .Com.
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 safety instructions 1. Read this manual 2. Read all safety instructions carefully as well as danger and obligation warnings 3. Never incorporate equipment or accessories not approved by l-acous...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 15. 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 pa...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 4 symbols indicated on the product the product is potentially life threatening if open. Never attempt to remove the back cover. The lightning flashes symbols next to the speakon ® and ca- com ® c...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 5 welcome to l-acoustics ® thank you for choosing the l-acoustics ® la8 amplified controller. This document contains essential information on using the product properly. Carefully read this document in order to become familiar with these procedu...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 6 3.3.7 example of heat power calculation..............................................................................................................16 3.4 audio and network cabling ..............
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 7 1integrated system approach 1.1 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 prote...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 8 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 ...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 9 2la8 amplified controller 2.1 main features 2.1.1 front and rear panels figure 2: la8 front and rear panels led meters: 1. Clip level audio level (-25, -10, -5 db) signal presence load presence l-net network control led 2. Lcd screen 3. Nav./e...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 1 0 2.1.2 simplified block diagram the core of the la8 is a dsp engine driving four channels of amplification from two inputs. The la8 also features a flash memory for preset storage and manageme...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 1 1 2.2 signal processing and amplification 2.2.1 analog input the la8 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 ...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 1 2 2.2.3 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, an...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 1 3 2.2.4 amplifier section and power supply the la8 amplifier section uses a class d technology supporting the very wide dynamic range found in live audio productions. The 4 channels can deliver up to 4 x 1800 watt into 4 or 2.7 ohm yielding pe...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 1 4 3installation 3.1 mounting the la8 is two rack units high (2u) and can be mounted in an eia-standard 19’’ rack (see figure 5). The four points on the front panel are for rack mounting. Use fo...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 1 5 3.2 cooling to maintain a low and even operating temperature the la8 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 f...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 1 6 3.3.4 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....
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 1 7 3.4 audio and network cabling 3.4.1 connection panels the la8 rear side features four connection panels (figure 7): analog for analog audio distribution, aes/ebu for digital audio distribution, speaker output, and l-net for remote control wi...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 1 8 figure 9: analog input panel wiring balanced cables symmetrical (balanced) shielded cables are highly recommended as balanced signals are less sensitive to ac hum and radio interference. Unba...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 1 9 figure 10: daisy-chaining digital audio figure 11: digital input panel wiring.
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 0 3.4.4 loudspeaker cabling there is a risk of damaging the speakers. Thedo2w, dofill and dosub pa-com ® cables are not compatible with the la8. All other l-acoustics ® pa-com ® cables can be u...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 1 3.4.5 l-net cabling the la8 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 la8 to l-net use the ethernet rj45 connectors on ...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 2 4operation 4.1 powering on, powering off, selecting the standby mode press the power switch up to power the la8 on, see figure 13. The la8 goes through a 9-second start-up sequence coming wit...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 3 4.2 display 4.2.1 main screen once the start-up sequence has fully cycled (refer to section 4.1), the lcd displays the main screen: figure 15: main screen preset memory number (1 to 255) 1. Memory space containing the current preset. The pre...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 4 4.2.2 led meters four led meters are located on the front panel above the lcd screen (see figure 16). Figure 16: the four led meters by default the led meters monitor the state of the four ou...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 5 4.3 user interface 4.3.1 quick access the la8 offers quick access functions for control (front panel locking, mute, and gain), identification and monitoring (display of the selected input mode, input level, routing, and group name). Lock/unl...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 6 identification if the controller is online with la network manager, it can be identified among other units in the workspace (refer to the la network manager video tutorial). Press and hold th...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 7 figure 22: pressing in a or in b input voltage values the signal led is lit when the input voltage reaches -37.8 dbu (analog audio source) or -59.8 dbfs (digital audio source). The clip led is lit when the input voltage reaches 22 dbu (analo...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 8 4.3.2 main menu the main menu gives access to the pages described in the following table. Please refer to the appropriate sections for detailed instructions. La network manager software all p...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 2 9 4.4 load preset a preset can be loaded from the following menu pages: table 4: load pst pages page memory range contents load pst user 1 – 10 (read and write) user presets stored by the user (refer to section 4.5). Load pst factory 11 – 199 ...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 0 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 b...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 1 4.6 delete preset a user preset contained in a user memory (1-10) can be deleted following these steps (see also figure 26): from the main menu select delete preset. 1. If the controller displays no presets available! It means that all user ...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 2 4.7 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 inform...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 3 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 4.9.5 for delay unit setting. Value setting resolution turn the e...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 4 4.9 options options is a control and monitoring menu allowing to: set the amplified controller ip address, input mode (analog or aes/ebu as well as fallback options), delay unit (ms, meters, ...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 5 4.9.1 network address remote control of la4 and la8 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 c...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 6 4.9.2 input mode this function allows selecting the physical input connector according to the audio source feeding the amplified controller: an analog audio source connects to the in a and/or...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 7 sound cut can be avoided using the fallback mode (refer to section 4.9.3) and a backup analog audio source. In case of unlock status the analog inputs will automatically be selected, leading to one of the screens of figure 33. An.Fback indic...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 8 4.9.3 fallback mode an automatic fallback option can be enabled or disabled. When enabled, and when the aes/ebu input mode is selected, this option prevents sound cut in case of digital signa...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 3 9 4.9.4 aes/ebu in gain the la-aes3 card includes an input gain module which can be set from -12 db to +12 db by 0.1 db steps. It helps aligning the digital audio source level to the analog level value so as to ensure seamless fallback switch ...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 4 0 4.9.7 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 c...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 4 1 appendix a: protection systems the la8 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 a...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 4 2 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 ca...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 4 3 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: la8 amplified controller. Is in conformity with the pro...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 4 4 appendix c: specifications general output power eia (1% thd, 1 khz, all channels driven) 8 Ω 4 or 2.7 Ω 4 x 1100 w rms 4 x 1800 w rms 4 x 1300 w peak 4 x 2500 w peak max output voltage 150 v ...
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 4 5 analog input connectors input link 2 neutrik ® female xlr3, iec 268, esd protected 2 neutrik ® male xlr3, iec 268, esd protected input impedance 22 kΩ (balanced) max input level 22 dbu (balanced, thd 1 %) latency 3.9 ms digital conversion tw...
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La8 amplified controller user manual vers ion 5.0 la 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 4 6.
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La 8_u m_e n_5 .0 w w w . L - a c ou s t i c s . C o m 4 7.
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W w w .L - acou s ti cs .Com document reference: la8_um_en_5.0 distribution date: march 4 th , 2013 © 2013 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..