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
Your ears have no idea how big the speakers are. It hears sound pressure.
Mikelavigne, where you said....

some good mid bass is also helpful; again the speaker driver surface in the mid bass needs to be matched to the volume of the room so it can propagate. the whole room needs to be energized.

is there a formula  one could follow in order to size the speaker system to the room?
Hi, Martin (OP) 

Much wisdom spread throughout the thread here and elsewhere online. 

My 2 cents... 

For a great condensed reference that touches on all this and much more, you may want to get a copy of Jim Smith's "Get Better Sound" 
https://www.getbettersound.com/store 

Jim is one of the best in the audio / music biz and there are many things within its pages that may help solve your issue or at least improve the quality of what you hear. It is likely to help with other considerations and improvements as well. 

Although his in-person, in-home consultations are pricey, he offers very reasonable 30 minute phone consultations. The book and the chat might be the best investments you can make (or will ever make) in your system and setup. 

Cheers, 

Ken


If you want speakers that sound big try magnepan LRS speakers.
You've never heard anything like them. Neither have most others here.
Big sound.....
- Big speakers like the double impact (say no to bookshelf dinkies)
- Concentrics if set up right since they can produce deep immersive holographic soundstages
- dual subwoofers
- Lots of wood diffusion panels on front and back walls
- If you are not a 2 channel purist, set up a atmos/dts 5.2.2 system with front heights or 5.2.4 system (front and rear height speakers). Front heights should be atleast 2 to 3 ft above your fronts and 2 to 3 ft outside of front speakers. The big giant orchestra and humongous immersive 3D soundstages will show up in your lil room. Some very smart guys declared a while ago that 2 speakers (stereo) are not sufficient to replicate the acoustics of large venues and they were absolutely right. Science will give you big sound!!