Bluetooth speakers are evolving. They have to… because just to offer great audio streaming from a smartphone is something any speaker can do now. This is why the Tivoli Audio Model One Digital Gen 2, though as small as an old transistor radio, it packs so many features that music lovers will have all their bases covered. In fact, the Tivoli Audio Model One Digital Gen 2 does look like an old transistor, the type we have all forgotten about. It even comes with an antenna in case you want to…