Shielded Speakers & Desktop Sound Card

I'm building an arcade cabinet and I'll be using a set of 5" 12 Watt Shielded Speakers (model 50-9005-00) for the audio found on the Happ website. Here is a link to the tech specs: http://www.happcontrols.com/accessories/49022800.htm.

I have never used these types of speakers before but since they will install much easier than traditional PC speakers, I have chosen them. However, I'm not sure how to get this type of a speaker to receive a signal from my audio card in my desktop (obviously this would be an advantage of using PC speakers).

I've heard that you need some type of amp with RCA converters that can then be converted to a stereo size jack. However, this is totally greek to me and I was wondering if anyone might have thoughts in using this type of hardware with a PC (IE: the type of equipment I would need, adapters, etc...).

Here is a visual so you can see the type of speaker I'm working with:


http://j8son.ironnerd.com/Misc./speakers.jpg