I am experiencing a pesky humming sound from my speakers while playing Bluray/Netflix movies from my Sony Bluray player that is connected to the NVI by coaxial cable, and from NVI to the XS2’s AV input by a DIN to RCA cable with AV Bypass mode on the XS2 turned on. The humming gets louder as the NVI warms up and louder still when something that sounds like a cooling fan kicks in.
I have tried routing the cable between the NVI and XS2 away from other power cables. It seemed to help a bit. I also tried to add a ground cable from the NVI to the wall but that didn’t seem to have any effect.
I see some ground loop cancellation solutions such as iFi’s GND Defender or DC Blocker that I gather would fit between the IEC power outlet of the NVI and the AC cable.
I would appreciate any advice.