Additional comments on the Schumann Generators (above post). My system is all Ayre electronics, Vandersteen 5A speakers, VPI turntable/plastic arm/Winfield Cartridge...all audiophile outlets, audiophile cables, careful setup, completely differentially balanced. I turned the generators on with my wife in the room and she most definitely heard a difference. She said that with the generators, the music was "sharper, condensed". I agree... with them, the soundstage opened up, the instruments were separated, greater depth ambiance, etc. I also noticed that with the a/s on the arm released the sound was better....I have a feeling the a/s device was adding unwanted resonance. I also have a Sony walkman with Grado in ear headphones....and with the Schumanns on, the sound was better, although quite excellent without. I read a lot about this, but still don't understand it....I just can tell you it works. I walked around the room with them and getting them close to the speakers, the sound was more bright/closed in. I have them about 4 feet in front of and to the outside on a window sill and about 4 feet from the floor. The more you listen to its abilities, the more you can focus on as to what it does and the more enjoyment. It doesn't improve my or my wife's sleep, though the dog is now sleeping the night without bathroom breaks at 3 AM