I noticed a lot of feedback in a few of my tones. After some messing around I found that my POD is creating an awful, almost ground loop type feedback that is constant no matter what is plugged in, what output I use, or what outlet it is plugged in to. I have tried it at a friends house, and using a ground lift switch (60hz) feedback eliminator. Nothing seems to have an affect on the terrible sound that is almost louder than my guitars input. At this point I am 100% sure it is the POD and not dirty power, any pedals, cables, or proximity to my power conditioner. I need help, as this is driving me insane. Any suggestions, or fixes are much appreciated.