The Marantz is only connected to surround a center speaker. But is not connected with power cable when the noise is also there. I recorded the noise with my smartphone -the noise seems to be also depending if the TV is connected with power cable or not!
Seems also depending on the TV cable - when connected to the TV directly the noise on the Devialet / speakers is really loud. Get‘s a bit better but still considerable when using the HMS Silenzio FM/TV ground loop isolator: sound recorded https://www.dropbox.com/s/nbwc614a4st8kq...t.m4a?dl=0
Without the HMS isolator it is really loud: https://www.dropbox.com/s/j96bkv06l9h24s...l.m4a?dl=0
Seems also depending on the TV cable - when connected to the TV directly the noise on the Devialet / speakers is really loud. Get‘s a bit better but still considerable when using the HMS Silenzio FM/TV ground loop isolator: sound recorded https://www.dropbox.com/s/nbwc614a4st8kq...t.m4a?dl=0
Without the HMS isolator it is really loud: https://www.dropbox.com/s/j96bkv06l9h24s...l.m4a?dl=0
