I frequently see an expression "to fill the room". As in "... you can't fill a big room with that speaker...".
I'm trying to understand what it is. To me, the size of the room per se should not matter, shouldn’t it? It's not like a bucket that needs to be filled with water. The room's wall and the reflections, I think, should play a much bigger role. Indeed, if the walls are made of an absolute sound absorber it wouldn't matter whether the room is 100 cubic feet or 10,000 cubic feet. It will be the same as outside in the open space.
When I read speaker specs the difference in the efficiencies in-room and in anechoic camera is only 3 dB. This is peanuts. So the only thing that should matter is the distance from the speaker, not the size of the room. Ok, ok, those measly 3 dB..
