I didn't know where else to put it, so please move if necessary. I have a home-made surround sound system set up in my dorm, with a pair of speakers near my door and wire running under the carpet to a pair of speakers near my bed, where my macbook is. I have a splitter connected to the pair of speakers near my bed and so when I connect an audio cable to my laptop the music comes from both sides of the room, thus the surround sound effect (cheap). But whenever there is nothing playing on my laptop, there is a buzz/static/hum coming from the speakers. But this is only when my laptop is plugged in. It is plugged in to the same surge protector that the speakers near my bed are plugged in to, and whenever I unplug the magsafe adapter the static goes away. I researched a bit and I read about something called a ground loop problem? Is this my problem? Any advice please? Thanks for your help!