Hi, I have the front L/R preouts of my Rotel AV processor connected to my Naim preamp's AV input (in addition to loads of other cables obviously!). The hifi kit (incl. DVD player) is plugged into one mains wall socket and the TV and VCR are into an adjacent mains socket. With AV selected (with TV on or off) I get what sounds like earth hum from front speakers - when no devices are connected to the TV it disappears. It doesn't happen when using my projector which is plugged into a different socket on the other side of the room. This is connected to my DVD player via component cables. This leads me to believe I need to ensure the TV has the same earth as the hifi kit. Is there a simple fix? Can I connect the two wall socket earths together? Due to physical restrictions (TV has short mains cable and is some way for the hifi) I can't simply use the same mains block from the TV. And I'm wary of daisy chaining mains blocks as I think the load may blow the 13A fuse. Any ideas or suggestions welcome?