Though they are portable devices, the iPod and the iPhone can make wonderful sources for headphone-free music when connected to speakers. Of course, wading through the glut of iPod-ready tabletop speakers on the market today takes patience and know-how, especially if you have an iPhone, which requires a unit with magnetic shielding for optimal performance.
Luckily, well-established audio device companies like JBL are providing more and more models with that feature, such as the JBL On Stage 400P. This $250 tabletop speaker dock is the largest of the On Stage line and bests its smaller siblings in sound quality. If you're looking for a cheaper alternative to Bose's SoundDock, this is a good place to start.