For true blue audiophiles, playing music on their mobile devices' speakers is just not satisfying enough aurally speaking. But of course it's impossible to lug around their nice speaker set-ups at home when they're mobile. What's the next best thing? Portable Bluetooth speakers seem to be the answer. A lot of major speaker brands have been getting into the fray and Bang & Olufsen are the latest ones to come out with their BeoPlay A2 speakers.