Speaker size and soundstage


Question: for floor standing speakers, how does speaker size affect sound stage, bass response, and the depth of music?

I’m searching for a new speaker, and just tested Dynaudio Contour 30 against Tekton Electrons (16x18 room with cathedral ceiling). Tekton’s are bigger (48 vs 45 high, and 10 vs 8.5 wide, about the same depth) and had a much larger sound stage and greater dynamics and depth. Tekton’s as a rule are much bigger than most other brands, which can be imposing in a room, but the size must equate to a greater sound stage. 
But can a smaller tower be designed to achieve the same sound stage and bass depth of a bigger speaker? If so, what what speakers pull this off?
w123ale
Forget either, and go out and buy some big azz Tannoys...you will get what you are looking for. My choice for you, the Ardens. Thank me later....although, I will point out that the cheap diamond 225's are a bit of a miracle little speaker...they produce an incredibly wide sound stage and produce copious amounts of bass for their size and price. I still own mine, despite now having tannoys....read about them in stereophile, $449 and a crazy good little speaker if on a budget. 
Sound stage has more to do with phasing, crossover points, driver dispersion, driver placement, and the shape and size of the front baffle than actual cabinet size. It’s also heavily influenced by placement, and the rest of the system.
Such fantastic input; greatly appreciated! 
I changed the setup yesterday by swapping out entry level cables with higher end cables. The dynamics in both speaker changed dramatically with both opening way up. 
The Tektons now have much greater extension, but are a little sibilant (may mellow as the wire burns in). The Dyns  soundstage is expanded substantially and they now fill the room and feel, perhaps, more balanced than the Tektons—more listening needed!

So to confirm other comments, the system and electronics do of course make a difference here, and in my case the speaker wire seemed to be an earlier limiting factor.
+1 knotscott - yes, drivers that play well together in an inert enclosure,  crossovers with a deep symmetrical anti-phase at correct crossover points that reduce to the point of elimination of breakout from drivers. The baffle design and driver basket interactions with the baffle, correct cabinet size for the drivers not the room.

Yes, knotscott same page here.


w123ale - shhhh keep that on the low low bro, speaker wires can't possibly make a difference **wink** (sarcasm intended)