We use the computer in our sunroom to load music onto our MP3 players.  Since all of our favorite music was already loaded, I decided that the computer was our best source to use for this Speaker System.  I pluged the jack into the headphone port and set the speaker outside off the pool.  We now have the potential to listen to 760 different songs without interuption.  The sound quality is great and all of our friends want at system like this.  We have enjoyed this product almost everyday since we purchased it.