Game Changing Tweak

Bemused, have you done this experiment? What was the result?

Geez, where were you guys on the thread about improvements from AC power cords?

Current harmonics occur on power lines due to non-linear loads, of which there are many.  Do they affect the sound coming out of your system?  I read through ADD-Powr's website. They claim,
"A complex wave "disturbance" rides  along the AC line. Since it is a low frequency signal, it is not filtered away by power supplies, such as a/v component power supplies.  Instead, it passes through the filter stages and becomes part of the DC reference supply voltage."

What low frequency signal are they talking about?  They don't say. This claim seems bogus to me, if for no other reason than they don't publish any actual data.  I couldn't find any product specs.  And, if it were a real thing, it would be easy to demonstrate.  Specifically:

1.  Show me a frequency graph of incoming A/C power (both the 60Hz  and whatever harmonics you want to include) and the corresponding frequency graph of amplifier output.  

2. Now introduce the "device" and show me the same graphs.  This kind of before and after will show both the frequency domain and the scale of the impact of the high pass filter.

Nada.  Nothing.  A picture says a thousand words, but only if there's something to show.

One other thing ADD-Powr says in describing their technology:  
"

• They generate and propagate low frequency signal information to affect harmonic change to audio signals.  

• They super saturate the AC line voltage with harmonics to affect a 1 to 5% increase of the voltage peaks delivered to the power supplies of system components."

Why exactly would you want to increase voltage peaks?  Stable voltage is extremely desirable, peaky voltage not so.  The vast majority of PQ problems are voltage related, either a sag or a surge, and those can mess mightily with electronics.  Also, how does super saturation with harmonics increase voltage?  Harmonics are undesirable.  Now, if you are doing PF correction, that will slightly lower voltage by lowering current flow, but they also specifically say, "

     ADD-Powr products are

    Electronic harmonic resonators.

    They are not AC power line conditioners".

Honestly, the more I read this on this site the more it screams Snake Oil.

@pragmasi
Your scenario doesn’t account for the fact that the distributors always have a money back guarantee and always give sufficient time to evaluate a product and return it if not satisfied. If we had to be persuaded of the theory before we buy a product, none of us would own a high definition TV model because we sure don’t know how it works. Most airplanes would be empty if the airline had to explain to all the passengers how it works. We try things, if they work we keep them, if they don’t, we return them. If there is a life or death probability, we let someone else try it first 😀

These marketing stories are just that, stories. Which is not to say there aren't improvements from using this stuff. Very likely there are. Its just to say the improvements are not for the reasons we're being told.

In fact the one thing I am most certain of is that they are NOT for the reasons we're being told.

Why am I so certain? Because a thin coat of Total Contact on the outside of a wire, AC or signal, makes no difference,  makes all the same great improvements people are talking about, and for certain it is not generating or saturating anything, and absolutely is not doing anything active. All its doing is somehow improving transmission. Somehow. We don't know.

People hate not knowing. Lotta people rather believe utter nonsense than admit WE DON'T KNOW! Oh, the horror!  

Me, I kind of welcome the not knowing. Because the minute you can convince yourself you know why, then you stop thinking about what if? Look around. Look how often it happens. Look at all the people trying to buy cables, and all kinds of stuff, based on what are nothing more than cockamamie stories. Only they won't call them that. Oh no. That's a big part of the delusion, to call your cockamamie stories theories, principles, facts, measurements, anything but what they are: narrative. Fanciful tales. Fables. Myths. Stories. 

The people screaming snake oil are no better. They know even less. At least the people who pretend to know why might actually bother to try the stuff and listen and use it and maybe learn a thing or two some day. The snake oil people, what they are really saying is their mind is made up, you're all suckers, and no way they will ever even try to listen and learn. They're the lowest of the low. They truly need a new hobby.

Of course, none of this really matters - unless you really are interested in building an exceptionally fine sounding system. Because then if you are serious about it you will go and listen and keep trying and learning, and maybe even one day realize that just like mahgister keeps saying the tweaks matter at least as much as the components.

Go and listen. You will see.