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 2 responses by twoch

well sir ,  you have good hearing  selling the speakers  i was happy to read that. Then you said 
B&W.  Keep looking about.  Speaker wire , Amp,
 Pre, all work to fix the problem.  i don't know how far from the wall the speakers can be  so i won't comment   
This is what happens , Some expert will say,,,
,,Ribbons and AMTs that spread around sound will sound bigger than a single dome tweeter.    The top two the Professional talks 
about need to be a way from the wall behind the Speakers.  start at 40 in  out  then move around  
 the 3rd tweeter is the one
you might be interested (example) Merlin VSM BM  
but again never sure  good
luck