Are manufacturer AC cables good enough?

"...can current be distorted..."

Yes it can. Stand in the river and watch.

Noone said blind tests are irrelevant. You’re putting words in my mouth. What I said is they don’t mean anything. They only mean something when there is a preponderance of evidence from many tests, independent from each other. 

Glubson is on roll today. Unfortunately for the rest of us. 😬 Talk to the hand! 🖐

geoffkait

Noone said blind tests are irrelevant. You’re putting words in my mouth. What I said is they don’t mean anything. They only mean something when there is a preponderance of evidence from many tests, independent from each other

That’s essentially true. And that’s why - if you’re among those who believe blind testing is the best way to evaluate an audio component - the only single blind test results that are really important are the results of your own test.

It’s really difficult to take seriously those who incessantly call for blind testing to be done by others.

"It’s really difficult to take seriously those who incessantly call for blind testing to be done by others."

Not that this topic will change the world, but dismissing arguments just because someone did not do the particular test herself/himself was probably accepted scientific discussion around the time we exited caves.

The requirement is that test results can be reproduced, not that everyone has to do the test before talking about it. To some level it is an honor system. You are presumed of not lying. That is why statements of conflict of interest exist. In this particular back-and-forth about manufacturer’s blind testing, there is a huge potential conflict of interest. Manufacturer may claim it in an advertisement as a description of their methodology, but that is where it ends.

Even reputable manufacturers with decent know-how (Revel speakers, for example) describe their practice as including "blind testing", but they make it clear it is for them to compare their products with competitors and improve what they can, and not anything more than that. Having said that, I am not sure you could just walk into their offices/lab, but I have seen many reports of people who actually went there and were played music in this "blind comparison" way.

Now, how much credibility in this honor system does a person capable of posting those things on facebook have is on you to decide.