Apparent noise in electrical current traveling in-and-out of power cables and being exchanged among components is news to me. As is the news that the internal circuitry of quality components is not designed to handle such noise (assuming it exists) and produce a clean signal.
It's hard to know where to begin with comments like these and I'm not sure where you are headed with this, so I'll contribute a few facts and step away. Its called alternating current for a reason. Components sit at the front of the electrical chain, not at the end of it. The further away you get from electronics the less well they can "see" noise, electrically speaking, but the radiated EMI and RFI within close proximity to electronics is easily measurable and when it is eliminated or reduced, its easy to hear and see if its a video or med. imaging system.
We have performed these demonstrations live at CES and other shows. We also have a plethora of video's on our You Tube channel that explain in great detail the science behind what we do. Yes, its well understood by any electrical engineer that electronic's with bridge rectifiers and or digital circuitry push back noise energy onto the electrical line. This can create high-frequency noise energy (harmonics) that are 50 times the line frequency.
There is no such thing as a power supply in audio, studio or medical imaging systems that can manage to eliminate that much high frequency noise on their own. We build a series of power cords with small filter-sets built into the IEC to help minimize the noise being kicked back from the power supplies of electronics. If you use a Fluke 43 power analyzer, the noise reducing effect is easily measurable and still, a product like the Denali will improve the perceived noise level in a dramatic way above and beyond any power cord. The power cord is the first step in minimizing noise radiation. We also make shielded power cords and there are hundreds of these that are now deployed in medical systems. Again, to minimize the effects of EMI.
Look, we have nothing to prove here. Our products are used at SkyWalker, Pink Floyd's Astoria Studio and David Gilmour's home studio, Rick Rubin's studios, James Guthrie's Das Boot studio, Sony Japan and countless others that have compared products and who's sole passion is achieving the best performance possible in audio reproduction.
Our products have found their way into Electrophysiology Labs across the country and have literally eliminated noise from these systems to the point that they can no longer measure noise. I know because I went to each of these EP labs and set up our system of shielded power cords and Denali technology-distributors. When the EP Labs were using isolation-transformers to "block" external grid noise (they also block noise coming from electronics and keep it in the system --a two-way brick wall), they had endemic, intractable noise issues that they measured at .5 (their measurement). Switching in Denali technology products (which filter noise from the grid and _from electronics_) lowered noise to .01, which is the limit of their measurement systems ability to measure noise. In addition, the EP Physicians could see the topography of the heart far better, which has lead to better outcomes for patients and easier, quicker procedures. This too is well documented from multiple Physicians and OR's and is on our web.
I have also been asked to consult on the build out of new EP labs in Minneapolis, Louisville, and Pennsylvania and a new Neuroscience center in Minneapolis, not because we make cool boxes, but because we know electrical systems and how to set them up better than anybody in the business. I can talk with these engineers, electricians and Physicians because I have worked with a genius in this field for 17 years. I'm no EE, I'm just a guy but I know a thing or two. I do all the travel to the studios, hospitals, reviewers and trade shows and I see and hear the results of quality electrical set up, Denali and power cords firsthand.
I don't think you know enough about us to stand back and judge anything we manufacture unless you look into things a bit further. Caelin is a former NSA scientist and developed low level signal acquisition systems for the military. He is also a Master electrician, as are his two sisters, his father and his brother.
Power cords are an extension of the primary winding in the power supplies of electronics--not the last six feet of miles of wire. A well designed power cord keeps the high frequency noise generated by electronics from radiating back into the power supply and minimizes the noise radiation from affecting other electronics. They are not intended to be a panacea, just an added protection from near-field EMI and RFI.
I refuse to get into an argument and I certainly don't need to vet the work we've done. Do some home work, watch some of the many video's that explain our technologies and science. Then call me and ask your questions, I'd be happy to answer. Playing this out on forums strikes me as something more than just seeking information. Not saying its disingenuous, but it is also not a well informed opinion.
If you do have intellectual curiosity, I'd be happy to answer your questions personally. I don't have the time to spend arguing points that have already been well explained on our web and many other places. Power cords, whether shielded or filtered are very well understood compared to 20 years ago and we have played a role in explaining and measuring exactly why they could play an important role in audio and medical systems.
You could start with these two video's.
The first in a simple noise test involving Denali:
https://www.youtube.com/watch?v=Z6f1kwyZbM8
the second is an ASCC test that demonstrates why a "better than stock" power cord has a dramatic advantage in delivering peak-current (the most important aspect of performance for all analog output electronics because this element affects timing and dynamics in sound)
https://www.youtube.com/watch?v=4qCK--lRFd0
Best regards,
Grant
Shunyata Research
