I actually have those speakers sitting in my closet. They'll work just fine. You'll need an amplifier that can handle speakers that are rated 4 ohms. If you have a stereo or home-theater receiver, you can try that. Just hook it up just like any passive home speaker: Sound card or on-board audio --> receiver or amplifier --> speakers.
If you haven't bought the Monitor Ones yet, another option is a pair of powered speakers (or active monitors). The amplifiers are built in, so all you need to do is hook them up to your computer's audio interface, which can be the computer's built-in audio, a sound card, or external (USB/Firewire). The simplest way to control the volume is to use your software, but most folks who use active monitors use a separate volume control or a mixer.
