Last year, Ultrasone claimed that their Edition 10 LE has lower EMF radiation to protect user from dangers that may cause hearing loss or something even worse. Although they did not state this in official web posting, they certainly repeat this message during road shows in numerous audio events. There are Youtube videos with Ultrasone reps making these claims.
Since my son uses headphones extensively, I wanted the lowest emitting headset for him. He has been using the Grado GS1000i and RS1 for most of his music work.
I took delivery of the Ultrasone ED10 recently and took these readings:
Mostly near 1 or under 1 milligauss for the Ultrasone ED10 LE
Mostly over 1.5 to about 2.0 milligauss for the Sennheiser HD800
Still safe as it is well under 3.0 mg, but.....
The Grado GS1000i here measured mostly around 1.5 milligauss, peaking close to 1.75 mg