hospital grade or commercial grade receptacles ?

Tbg, lighten up. I once read about the scientific method, and it did include something about observation, but I think that meant *valid* observation. Listening for differences without a double-blind environment is not considered scientifically valid, so let's get off of our scientific high horse. But DBTs aside, I still don't understand how outlets could affect the sound of an audio system, and no one here can explain. I have a rudimentary knowledge of electronics and I can't explain how it could possibly be that two outlets of similar specifications make a "night and day" difference.

One could reasonably complain that I haven't changed my outlets, so how would I know if they made a difference? Well, my outlets are brand new (as is the whole house), and I did change the power cords and did not notice any difference in sound. Not even a little bit. Is there a difference between outlets and power cords? How could there be? Of course, I wasn't expecting to hear a difference, so maybe THAT'S why I didn't. I wonder if I've stumbled upon the real answer...

Tbg...In keeping with your suggestion to make observations, I went outside and looked around. I observe that the earth is flat.

Eldartford, does that mean you agree with Irvrobinson?

Albertporter...Come now: you know that two audiophiles will never agree completely. My comment of 11/14 sums up my opinion.

So, you mean to say you think your statement is correct?

If they were real changes in the electrical signals going to the speakers, they could be measured, and they would have a technically identified cause.

And if your answer is yes, how do you explain the fact that a half dozen NOS tubes that measure identical (electrically), sound completely different?

It appears you are saying, if it can't be measured it cannot be audible. I think you know better than that.

As for Irvrobinson, he may be like some that have already passed this way and are now gone, those that came to Audiogon to argue without any concept of the importance of every part in a high end system.