Schumann Resonator

The costly one works better, doesn’t put out a square wave looks nicer and you only need one in your audio room not a bunch of them like the cheap ones. Rep

I said that because before investing many hundred dollars for nothing, if your room and gear is not prepared enough with a too high noise level to be able to give to you some audible effects, at least you will lost nothing buying 2 cheaps one at 10 dollars each before  buying a very costly one..

The effect is audible but not in all conditions...

This is nonsense, unless you can come up with a real explanation.  The green stripe around CD;s had an explanation as good as what you folks are saying, and it had its adherents.  Hydrogen atoms?   BS!  Hydrogen is so light that absolutely none of it hangs around in your room, or near the Earth's surface.  Please do better.

bhvf nailed it

I had in my gray matter somewhere 7.83 hz and the above site explains it.

said that because before investing many hundred dollars for nothing, if your room and gear is not prepared enough with a too high noise level to be able to give to you some audible effects, at least you will lost nothing buying 2 cheaps one at 10 dollars each before buying a very costly one..

The effect is audible but not in all conditions...


These devices don't do anything for your audio gear or room, they make the person more in tune with the frequency of the earth.

There is an assumption that some of the desirable qualities of a good system are not measurable. I wonder how someone from my world (research and statistics) would try and tackle that.
Take one quality often cited as unmeasurable but highly desirable and strongly influenced by cables / resonators / power supplies / fuses : soundstage.
Why not play 100 people a track and get them to draw what they “see”. Like this.

Then bring the Schuman device or whatever into the listening room and ask 100 different people to listen to the same track and do their drawings.
Simple statistical analysis of the two sets of drawings would reveal if the soundstage has become wider, or if the instruments are more distinct in their position within it. The same drawing would also reveal “clearer deeper bass”.
Be fun to try, anyway.