To produce sound on you computer you need a sound card and speakers. Many systems have speakers built-in, however, they are often poorly amplified. A great way to expand the use of your computer is to add some external speakers. This feature will allow you to enjoy MP3s, cds, gaming, and more. Speakers come in a wide variety of styles and combinations. Ranging from the simple stereo setup with a left and right speaker, to the full surround sound packages with Digital processing that is great for DVDs.