Originally Posted By: XenonMan
The hum is caused by a differnec in your ground refernec between all of the various pieces of equipment in your system. Make sure they all share the same ground. All of my stuff is plugged into my power conditioners ss they all share its ground condition.


It's all plugged into the UPS that my PC is plugged into (however only the PC and the monitor are plugged into actual UPS sockets, the receiver and the sub are plugged into the simple "circuit breaker" sockets on the UPS, meaning if the power goes out, the UPS will not power these sockets.

Quote:
If that does not fix it, make sure all of your signal cables are separated by a few inches from your power cables and verify the integrity of the cables.


Ugh, this will be hard - there is a lot of cables back there and the goal was to make the cabling as unnoticeable as possible. smile