My Finalizer 96K is doing a hum noise when connected to my mixing desk. It's the only one to do that and I have to plug it in without the ground to reduce that noise but it's still there anyway. The selftest says everything is fine. What's going on?
Try to connect the Finalizer to the same mains outlet as the console.
Please try to keep the audio cables to and from the Finalizer as close as possible (perhaps try to twist them). Preferably the connections are fully balanced and the console should be connected to ground.