Old computer speakers make great Mp3 speakers. Ebay has plenty of these for cheap. Look for good brands such as Boston Acoustics, Altec Lansing and Cambridge Soundworks. I usually get a 2.1 set up with the bass cube separate. Get a bag to carry them in and presto, a portable sound system that takes 2 minutes to set up. I use mine at work. They stand up to even the toughest construction sites, and people are amazed at the sound.
