Power management is very site dependent. Depending on the power grid you are on, what your house is like... lots of noisy things in your house.
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I wouldn’t look at it as if a power cord is going to make things worst... I would look at it as how much improvement will it give you.
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A good plan is to borrow power cords on line or from dealer and experiment. If a power conditioner makes a big difference power cords all around are likely to have a big effect.
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We have all buried power lines in our neighborhood, so the power is pretty good. Power management still makes a difference. All that said, no question listening is best Sunday nights at midnight... showing me, I need to pay more attention to power... Damn... this post is going to cost me.
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This is actually why I read and post in the forums. Writing about what I have learned frequently has me put together some observations I had not previously assembled to form a conclusion. In this case I am sure it is going to cost me at least $10K. But I am also sure it will be worth it.
