Hi all, I've had a REL Q150 for a while now. It's hooked up to my 3 Arcam Alpha 10s (DAVE), alongside a pair of Monitor Audio PMC 703 speakers, a KEF 100 centre speaker and a pair of Mission rears. It all works very nicely. My issue is when the Arcam system is put into standby or turned off the REL Q150 starts to make a loud humming noise. When the Arcam system is on it is quiet. I've checked the earths but all seems fine. Does anyone have any ideas or tips for sorting out the humming apart from unplugging the REL everytime I turn the system off? Thanks, Gareth.