1. 1/8th inch stereo Headphone jack.
2. 1/8th inch stereo Sub out jack for the optional subwoofer
3. 1/8th inch stereo Aux in jack for external audio devices like the Tivoli Model CD player.
4. 1/8th inch stereo Rec out jack for recording.
5. 1/8th inch stereo mix in jack for mixing in audio from another source with what you are already playing.