System and speakers in a large room vs in a small room?

I have heard a recording of my Tetra 606 speakers in a large room with a couple of hundred people and the sound was spectacular! It seems that a large space allows the speakers to “breath”.
I used to have the top line Tannoy Westminster Royals. Definitely felt that I never really heard them in my normal size living room. Do larger speakers perform better in large spaces?