How to add a subwoofer to my pc?

[mibaup]

Hello,

So far I had a 2.1 set of speakers (subwoofer and 2 speakers), and all I had to was to plug the 3.5mm jack to the pc and everything worked together.
But now the speakers aren't working too good, and I thought of buying the new "dancing water" speakers, but they don't come with a subwoofer.
So I wonder if I want to add a subwoofer separately, to work with the speakers, is that possible, if I only have
one 3.5mm socket in my pc?

*Edit : I think I found some options, Get a 3.5mm splitter to the pc output, or get a 3.5mm to RCA converter so that I can connect the 3.5mm speakers to the sub.

Thanks!

 

[linnemeyerhere]

Some powered subs will take the green stereo signal and then pass through them to the powered speakers. Otherwise you would want to look into a sound card which likely will provide better sound and control anyway.