The ground connection is required for the passive module. But it could
be done also via the connection of the active module (This was not
described in Dieters instruction).
Florian
> Thanks for the info Dieter - EMIS are wiring them for me.
> Can I just ask you -
> Do I need to provide power for both the mixer modules, of just the
> one that has the IC remaining installed
>
> Richard