Lol, you need an amp to power those speakers. Get a receiver that you can plug the computer into, then hook the speakers up to the receiver's amplifier.
so what kind of amp are we talking about here ? (I'm sorry I don't even know the basics about this sh!t )
Do you know any prices or links, just to give me an idea? It's not like I want to spend hundreds of dollars on this, but I thougt it might be fun to upgrade from 2.1 to 5.1
You might also try finding used ones on ebay and craigslist; if you don't need HDMI connectivity you can good used ones with good amplifiers for cheap.
no, $ 200 isn't worth it for me, I have a fine set of computer speakers, I was just hoping for an easy upgrade, like a little switch or plug, something silly