Hooking up a Klipsch Promedia 2.1 subwoofer to a home stereo?

[KonnorKiddoo]

I have just the subwoofer from a Klipsch Promedia 2.1 computer speaker set. I want to hook it up to my Sony stereo in my room. It has ports on the back for "satellite speaker hookup" (+ and - for left and + and - for right) as well as "preamp input". I wish to somehow make this subwoofer play with my stereo. It's 240 watts. And suggestions?