Listening longer and more closely to the problem, the sound isn't necessarily a humming, but a crackling sound. If the source (CD, DVD, doesn't matter) hits certain frequent frequency, the speaker cuts out all together. I'm gonna return it.
and BTW, I know that touching a speaker isn't a good idea
I'm running the speakers with a Pioneer 814 receiver. It's not the greatest, but I think it should be good enough. Anybody have any opinions on this receiver?