I have a tough time believing regular household gadgets can cause this hum. I've had powered subs in my house since the mid 80s. Believe me there are plenty of the listed gadgets here and I've never had a hum problem from such a source.

Not that I haven't had ground loops but certainly not caused by cell phones and such.

Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud