Plugging speakers in headphone ports

Alright, I plug speakers into Discmans and portable CD players all the time - never had a problem. They are powered speakers obviously. Well, I have 5.1 speakers hooked into my soundcard and they are a pain to disconnect. I would like to hook up a pair of 2.0's to be placed at a different part of the room. I have a "headphone" port on the front of my computer, from the same souncard, as well as in the 5.1 speakers themselves. Would this "headphone" port be able to have regular speakers hooked up to it? Or is the voltage most likely limited to a certain point and it wouldn't be a good idea? It would make things extremely easier to be able to use one of these ports for the 2.0 speakers. These are powered speakers remember. Thanks.

Thanks for the advice. Upon further researching, I see that with my particular soundcard and setup (Soundblaster Live 5.1, old, cheap), the front headphone port is amplified while the rear port is not. Therefore, the front headphone port is designed for headphones, but I believe you are right; plugging speakers into it should not cause any problems.

Has anyone tried to hook up a pair of speakers into the headphone port of another pair of speakers? Any risks with that?