What makes speaker's sound big?


Does a speaker need to have many drivers or a large driver area to sound big and fill the room?
I am asking this question because I have a pair of tekton design double impact and would like to replace them with smaller speakers and a pair of subwoofer's to better integrate the bass into my room.
I just borrowed a set of B&W 702S. The are good but the just don't make that floor to ceiling sound that I like.
Maybe I have already answered my own question (: But again I have not heard all the speakers out there.
My room measure 15x19' and the ceiling goes from 7.5 to 12.8'

martin-andersen
I have a pair of Tekton Ulfberhts. They are 7ft tall and contain quite a few drivers. They certainly sound big.

I also have a single driver LII Audio Fast 8 in a simple open baffle by itself. Amazingly they sound big also!

Both sound big in the room I have them it. It's quite striking. The room isn't everything, but it has a LOT to do with how "big" a speaker sounds.
I’m not saying the latter should trump (no pun intended) the former, but that some coexistence is necessary here.
I think that all is linked to the size of the room...In relation to the speakers...

And i then understand your point and we understand each other i think...

Thanks and my best regards to you....
Hello . Horn loaded speakers. Very sensitive doesn't take a lot of wattage to get them singing.  I don't work for jbl but they have quite a few speakers with compression drivers and decent woofers that not only fill your room up but will have strong deep BASS. or you can do some research and build your own set of speskers