I have to adjust mine quite a bit -- but I have a different setup. Mine is a laptop...and the power source is constantly "on" to a degree to charge the battery. It doesn't have a battery in the slot, so the power draw can fluctuate to a bit. I've had it in one spot for a few weeks so maybe it will hold. I'm sure a more electrically-inclined person can give you a better answer, but I know you will at times "draw" more power from your wall -- and need to adjust the sensitivity. That's why there are companies that sell power regulators (e.g. the monster cable one) to control this for home theater systems.