Power cord length

I wonder as I finish an area of my basement for my audio equipment if the wires in the wall generate a magnetic field that can interfere with the equipment. Which has more advantage for my money: the plug directly behind the equipment with a short (higher quality for the same money)power cord or off set the plug to one side away from the components with a longer (lesser quality for the same money) power cord??

While checking out old reviews on Stereo Times website, I happened across a review for Loss Less Dynamic Filtering power cables. Check out their presentation/explanation for their design.

DFPC Series cables : High end power cables | Audiophile power cords | Audio power cables by LessLoss

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Originally Posted by LeRoy

While checking out old reviews on Stereo Times website, I happened across a review for Loss Less Dynamic Filtering power cables. Check out their presentation/explanation for their design.

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Interesting cable. Because their cables skin is a filter, it makes sense that the longer they are, the more filter you have.

I guess my question really becomes: does an AC wire in the wall generate a magnetic field or does the pulsing of the two wires negate themselves as they are going in opposite directions?