Thank you Stehno. You've summed things up quite well.
Unless one has equipment or power cords with some type of low pass filtration built into it, there is still PLENTY of AC grunge getting into their equipment even with dedicated lines. Then again, one might be amazed at what can be removed from the power line by using parallel filtering and / or high current line isolation devices.
How about i start loaning out one of my AC Line Sniffers to you folks with dedicated lines and you can start checking out just how effective those lines really are ? You can compare the noise on your dedicated lines to what you hear on your standard household lines. I'll even include an adapter so that you can check out just how effective your "mega-dollar" AC cords are at reducing incoming noise. Believe me, what you think of as "clean power" from a dedicated line is NOT pretty. Nor is it "clean". I've viewed it on a scope, listened to it on a modified Sniffer and measured it on a calibrated test equipment, all at the same time. All i can say is that dedicated lines are but a starting point.
My guess is that once you became familiar with what was really taking place in your AC system and knew how to interpet the data that is available to you, you would start re-thinking your investments and start looking at alternative means to power line filtration & conditioning. The cumulative effects of PROPERLY EXECUTED noise reduction in an AC system are both measurable and audible. That is, IF one uses common sense and maintains a low impedance path for the electricity to travel through.
Like anything else, there is a "science" to this. While we don't have all the answers to solve the mysteries of the Universe, mankind is smart enough to figure out a few things here and there. Getting rid of noise on an AC line is one of those things. Whether or not it can be done on a "simple" and "cost effective" basis depends on just how "clean" someone wants their power to be and how many side-effects they are willing to put up with. As such, "clean" is a relative term, just like the words "good", "sufficient" and "working". Something can "work sufficiently" for minimal cost. Something can "work good" for a little bit more money. Neither approach means that they are "working optimally" since that approach typically requires a lot more time, labor and money but all of them would be "working" to one extent or another.
Having said that, most approaches to AC filtration are attempts to make things "better", but are done so in a cost efficient manner. As such, the drawbacks to such an approach are audible side effects due to higher than acceptable impedances and current limitation. Audioengr discussed some of this in a recent AC cord thread and used science / math to try and prove his point. The same principles that allow him to do that also allow us to solve other problems, IF one wants to. Once again though, it all depends on how badly one wants to solve the problem and how many side effects they are willing to put up with. If one wants minimal side effects with maximum performance, one may be required to put in quite a bit of time, energy and money to get there. Sean
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