James, thanks for replying my post in very detail, let me tell you the story, i need a speakers to be the surround speaker in my home theater, and one day i went to a friend of my's house and found this speaker, my friend is not a speaker fan and doesn't know about the speakers,and he likes to sale them to me in a very good price.I want to get it because it is a very good deal, but i can not find any reference about it on the internet, so I'm worry it is a fake or diy, I can not tell you which country i am but i can tell you there are a lot of fake thing here.