[ninty]

I have a set of logitech x-620 6.1 surround speakers.

[img]http://www.wallabie.com/main/images/hardware/logitech/X620.gif[/img]

They work awesome and I am happy with them. Today I went out to get a pair of headphones. I settled on the Koss UR-18. I read some reviews and these were in my price range and are very comfortable.

[img]http://www.realelectronics.com/i/UR-18.jpg[/img]

My question is that when I plug the headphones into the jack on my x620's, the x620's don't even have to be on to hear sound. It doesn't matter if its on or not. And the volume control knob on the 620's doesn't work either. The only way to turn up or down the vollume is by changing the volume slider in winamp or whatever other app i'm running.

Is this normal? I tried it out on some other headphones and it does the same thing leading me to believe this is the way the speakers were made to be. I was really used to having to turn on the speakers to get sound out, and you could adjust the volume with the knob on the speakers. It's not a big deal, but I would like to know. Thanks.