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

Showing 1 response by mozartfan

I also have a single driver LII Audio Fast 8

~~~~~~~~~~~~~~~~~~~~~
I have this  fast8 arriving in 2 weeks, I just surveyed several LII 10's and 8's on YT vids, ,,seems a  tad warm in the critical mids,,But we'll see after i build the cabinets, Will uploada  YT vid,
Now to answer the OP, 
The answer he is looking for is
~~Sensitivity~~~
The Thors with 87db sound like a wet blanket
's been thrown over the speaker, LITERALLY!!!!
Vs a  relatively high sens at 91db FR Diatone 6.5 wide band. 
The Diatone 91db sounds bigger vs the MTM Thors, 
Go figure, db sens is everything in a  speaker, 
Lower the db more ouny sounding speaker, higher the db la mas grande the image. 
Its that simple.