As long as you follow the rules as written by the national electric code all of this other stuff doesn’t make a difference. The engineers that designed the product that you purchased at the store have thought through all of this. Of course you know AC stands for alternating current. For some unknown reason, people fall into the trap of thinking of electricity as if it were water. Some of the metaphors between AC current and water do make sense but many others don’t. Before you hear anything musical, it’s all converted into DC inside the component. Every component does this, that’s the point where everything changes and the engineers have designed the cleanup of the power. If I was an engineer, and I’m not, but if I was, I would want this step in the process to be as effective as possible as to not make my product susceptible to interference. Thus making my design sound less than what it could. You’ve got this process in every component in your system. It’s been cleaned up right before it hits the DC circuitry , that makes the component work. The engineers have left no time for it to get contaminated. If you’re going to think of this as cleaning up the power that’s the place to do it. Right before you drink it and that’s what they’ve done in every product that you have in your system .
I think that these changes that you speak of that happen daily can be attributed to you and not the device. Think about all of the things that change inside of us as living organisms. Depending on how much moisture is in the air affects your sinuses, which are part of your ear, nose, and throat. What about the amount of earwax and location of the earwax that changes from day to day? how about just your general mood? I’m sure if I thought about it I could come up with more. I really believe that there’s more things that alter what we hear because of being human than things that change inside of a wall outlet.
