No, the "Aux In" connector is an input, not an output. Because the speakers are built in, the unit has no speaker outputs. The only output is the "Phone" headphone minijack plug, but this would most likely require active speakers, i.e. speakers with a built-in amplifier, and whether the sound quality would then be good enough is another question. If a good sound in a large room is desired, I would rather buy a DAB tuner (e.g. from Hama) and connect it to the stereo system.