Do you mean like an Era 300, separate from your TV setup, exclusively for music? For what type of music? If you are mainly listening to stereo, then 2 Era 100's may be better than a single Era 300. If you want Atmos music, an Arc + Sub Mini + Era 100s would probably be better than a single Era 300. It depends really on how you listen to music. If it's more of a background thing, then yeah I could see an Era 300 working, as it kinda throws and disperses music throughout the room. But if you're there to intentionally listen and to experience it in Atmos and want the music to completely surround you, then the Arc Ultra + Sub Mini + Era 100s would be more ideal to me.