Log into the online Configurator, select the Devialet 400/800, then the chaining settings. The "share sources from slave" box needs to be unchecked in order to able to select AES/EBU as a possible chaining link. The configuration will be the same as on the D-Premier but you will not be able to use the Companion's inputs.
Chaining Dual Mono via AES/EBU
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