Schumann Resonator

bemused is exactly right. Like I said before, this is nothing new. I've been using ElectroClears in my system for at least 10 years. They labeled their products as using QRT technology.  Nordost eventually bought the rights to QRT and have a number of products based on it. I think ADD-Powr is just another derivative of that technology. All of these things manipulate electromagnetic fields and the resonances they create.  I really don't get people who don't understand this or think its "voodoo" After all, since we use Alternating Current (AC) the sole purpose of a transformer, for instance, is to change the magnetic field. The Schumann Resonance is just a naturally occurring change to the electromagnetic field. 

@bemused, There is a sucker born every moment. All of you tweaky guys would do better spending your money on lottery tickets. You might actually get something out of it. 

@ mahgister, I think you need a job.

And no one questions putting a bunch of these in their room, not one of them synchronized with the others. Nor do they question how "efficient" that antenna, often just traces on a PCB, would be at 8Hz. Pet rocks would work better.

@mijostyn and @audio2design - do either of you even know what the Schumann resonance is or how electromagnetic fields work in transformers and/or alternating current? Stop the "pet rock" and "buy lottery tickets" stupidity.

Why would anyone disparage the use of these things.   If they enhance the musical/sonic experience, their existence has been verified.  I don't care how they work...only that they work at all...and indeed they do.   I've had Mk 11 upgrades to components that weren't as efficacious.