Fascinating. Somewhere in some of my comments I made note of this. Immediately upon plugging the first one in I felt something like a slight tension in my head. It wasn’t a lot and I was kind of hyper-vigilant trying to notice any little thing and so I thought the feeling in my head was, you know, all in my head. There was no doubt about the sound improvement, and the feeling of unease hung around all night. But it wasn’t bad and I will put up with it for the sound improvement. After a couple nights it went away. Never felt it again.
Until I added 2 more. Then sure enough, same exact feeling. Only this time went away faster. This has since repeated every time more were added. My wife never noticed anything like this. The one I sent Krissy, identical to mine, she was gushing how it made her feel so good. Her cat finds it, curls up and sleeps right next to it.
These things definitely have an effect. What exactly varies a lot. If you can’t hear a difference you can’t hear a difference. But it would be interesting to know if that feeling goes away in a day or so like it did with me, and if then when you are relaxed you might notice the sound is better too.
Hope you got PHT Black and Green. Black is more neutral, dynamic. Green is more dreamy liquid. Try moving them around to find where they work the best. Together they are the bomb!