If you've got teenagers in your house, you've got loud music. Lots of it. But be aware, it could be worse: They could have a bed that plays music too.
The "Tune-In Bed" from PBteen essentially turns an entire headboard into a sound system with two 4-inch stereo speakers and a control panel for connections to an iPod or MP3 player. (Maybe there's a way for parents to hack the volume levels.)