you can buy this cord at radio shack and one end of the cord has a plug that you would plug into ur mp3 player just as if u were pluging in headphones, and then on the other end its got the red and white plugs, so...u just plug it in

they arent too expensive, like 3 bucks
nickx760 Reviewed by nickx760 on . mp3 player to stereo ok heres the thing, i have an mp3 player and i have a stereo in my room. i dont want to burn a whole bunch of cd's, so is there anyway i can use the mp3 player to play my music on the stereo. i heard about those car cassette adapters but dont know if they would work.. Rating: 5