I think the shape of the room is more important than the size.
Bigger rooms better for sound?
I am planning to move all my equipment to a bigger room hoping it will sound even better. It has a higher ceiling and several feet more in length and width. And my speakers will have no problem filling the space.
I will miss the cozy room but it makes sense if I want to improve my sound at least that is what I hope for.
Why do larger rooms and a higher ceiling improve things?