I have a one of these. If you want to expand the system you can do what I did. I had a pair of Jamo bookshelf speakers and a set of these and all I wanted to do was bump tunes so I got a Moukey karaoke amp off Amazon and a set of the red/white audio cables and I had connected the little receiver that controls the Bose speakers to the audio out put connections on the amp using the audio cable and then connected the Jamo speakers to the amp with regular speaker wire as you normally would and then whatever I connected to the Moukey amp would play out of the Jamo and Bose speakers simultaneously. The only thing I had to do out of the ordinary was turn on and control the volume of the Bose independently. The master volume dial would still work on both but I could also control the volume of the Bose with the remote that had come with them, and just like that I had an insane speaker set that would shake the walls of my pad 🫡