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
Magnepan 1.7's would do very well in your room. Soundstage,  Dynamics, all there. 
Check out Tannoy's. After a year of moving things around and learning more about speaker setup, I finally found the magical position for the Turnberry's. Since then, it's been heaven. Nice wide and tall soundstage and I have depth. Imaging is excellent. 15x20 room with not a whole lot of room treatment. My listening area is open and no clutter near the speakers or in front of the listening position. Gear is also down low and horizontal. It makes a difference. More room treatment and solid doors are next on the to-do list.
I agree with those who have pointed to adding a pair of Subs to increase your Soundstage, for your situation. Getting another brand of speaker in the same price point is more of a lateral move than an investment in achieving your goals.

I have speakers that perform very well within a frequency response between 30/28Hz - 40KHz. That said, after a few years I found myself wanting a more dynamic soundstage without breaking the bank. By adding a pair of REL subwoofers, I was able to extract deeper, cleaner bass,  fleshed out detail in the midrange and greater sense of spatial separation. I would guess that the low frequency is about 20/22Hz.

Good Luck

Lyndonbell. You are asking about “Crossover settings” on your AVR. YouTube had excellent vids on this subject.   This forum is full of nitwits who won’t give a straight answer.    

As to speaker size, large floor standers xylene to have a rich full sound especially for large rooms.  That is my wife’s preference.   But nothing to do with soundstage and imaging.  Personally I think Sonus faber make some of the best.  https://www.sonusfaber.com/en/products/olympica-nova-i/


Tektons have a terrible image. Stay away.

Those who have actually heard them beg to differ:
The imaging was so good that I felt like the vocalist was performing right in front of me and that I could reach out and touch them.   

I enjoyed hearing everything but was most shocked at Fleetwood Macs "Landslide". Hearing it so many times in the past and then not recognizing the intro because of the detailed soundstage. Then Chuck let Stevie Nicks sneak into the room and begin the vocals dead center right in front of me and the recognition set in.   

The soundstage starts a few feet behind the speakers, and extends well out into the room, seemingly surrounding you. I've never (in a true two speaker setup) felt so enveloped by the music as I was last night.

...a near religious experience.

https://systems.audiogon.com/systems/8367