hello, I have a question, hope someone can help me there? I already have 2 Sonos One and now I want to buy another Sonos 5. Can I connect the 3 boxes without an additional device and control them with the app? I meant but a certain number of boxes you need an intermediate device.... Could someone explain to me in layman's terms (i.e. without too much technical detail) what the difference is between Sonos 3 and 5 and for what purpose which box would be recommended? Merci very much :)