Installation
Digital audio
In a daisy-chain layout, the male XLR link connectors LINK A&B and LINK C&D feed the input signals to the next amplied
controller in the signal chain.
daisy-chaining digital audio
IN A&B
IN C&D
LINK A&B
Cables for AES/EBU digital audio
AES3 species that the nominal characteristic impedance of cables used for AES/EBU digital audio transmission shall
be 110 Ω ± 20%, and closer tolerances allow for increased transmission reliability over long lengths or higher sampling
rates.
Therefore, it is highly recommended to use high-quality AES/EBU rated cables only, although certain cables designed for
balanced analog audio prove to be acceptable at 48 kHz sampling rate over very short distances.
It is recommended to use single lengths of cable between AES/EBU outputs and inputs. Using several shorter cables
joined together reduces performance. If it is not possible to use single lengths, it is required to use the same model of
cable between two AES/EBU interfaces.
In case an amplied controller shuts down, the failsafe relay makes a passive connection between the AES/EBU IN ports
and the LINK ports to maintain continuity. However the signals are no longer refreshed for the next amplied controller,
so that the input cable and the link cable must be considered as a unique input cable with regard to the maximum
supported length.
In case of transmission losses, try to reduce the sampling frequency of the digital audio source. Moreover, as a general
rule, avoid using sources rated beyond 96 kHz, as the maximum possible cable length is reduced, while the additional
information is cancelled by SRC to 96 kHz.
L-NET
Do not create loops in the network setup
LA4X and LA12X amplied controllers should always be placed before LA4 and LA8 amplied
controllers in daisy-chain networks.
LA4 and LA8 amplied controllers are equipped with former generation 100 Mb/s Ethernet ports that cannot
communicate with Ethernet ports of different capabilities, creating detection issues in LA Network Manager.
To connect LA4X to L-NET in a daisy-chain, star or hybrid topology, use the etherCON connectors on the L-NET panel.
Refer to the LA Network Manager Help for network setup.
LA4X owner's manual (EN) version 14.1 25
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