Just received my new MFW-15, with a very nice card. Got it up and running and I am noticing some hum. The hum occurs only when the subwoofer input cable is connected -- and it increases as I increase gain on the sub. Ideas? This isn't a ground loop problem right? I assumed ground loop problems could be heard even without an input cable connected.
Edit -- I think I've found the culprit. If I pull the HDMI from the DirecTv box out of my receiver, the humming is cut down by 90%. What is the best way to resolve this?