Glad you're all enjoying them.
I was looking to see how similar your findings were to our tests and this has been very helpful to us as well. So, I should thank you as well for giving your feedback so... Thanks guys!
What you're hearing, at least for the most part, is the result of reducing mechanical vibration in the incoming power. It is best usually to use the cable on the source as the better (cleaner) the source or signal quality the easier it is to amplify and the more truthful the reproduction. Our view is this: better audio is all about better devices. We see science pointing us as toward energy efficiency as a means of building sounding audio.
That leads us to what we did in the Power Three cable you have, you see, eliminating vibration is now commonly understood to lower noise-floor and audible distortion. Treating or reducing vibration at the source makes good common sense so this is what the device (plug and play modifications, we call them) is designed primarily to do. If you can successfully lower vibrations in the audio path at any point you will allow more signal to flow in replacement of that vibration, or at least, that's the theory.
Your observations are the helping us to further verify this. So far your findings are pretty much on par with our predictions of what the cable should do, and the audible result of lowering noise. I might add we have consistently found this result over six years now and thousands of observers. In fact, it all started right here on Audiogon six years ago with our very first plug and play modification product the Power Three.
This is why I choose to do part of our give away with Audiogon members as you indeed started us and continue to support us in our unique ideas about how to make audio a greater pleasure, at least for some those who will give different things a try with an open mind and open ears as you have done, so thanks again to all of you here at Audiogon.
Have fun with them and keep us posted.
Rick