Raising Subs?

What would those "significant improvements" be? 

I bought a 23' inch tall bar stool to try this out, but the ding dongs at KEF Support sent back my KC62 sub badly packed last night and the sub does not turn on. 

I wanted to see try to reproduce a physical representation of the KEF LS60 speaker, or Baby Blade. There are some photos on the net where people are doing this and also where someone had stacked an LS50 monitor on top of the KC62 sub. I am curious to see what that sound like.

Imo an advantage of using more than one subwoofer is that  you can distribute them far apart and asymmetrically such that each is a different distance from the room boundaries.   The result is a significantly different room-interaction peak-and-dip pattern from each sub, the sum of which will be smoother than either sub alone.

@secretguy ime it is beneficial to distribute the locations of multiple subs in the vertical as well as horizontal plane, such that you get the aforementioned summed-room-interaction smoothing in all three planes.  If you can, I'd suggest raising one sub closer to the ceiling than to the floor, and leaving the other on the floor.  

Duke

subwoofer manufacturer

secret guy

When you say " significant improvements", what exactly are the improvements that you would like to hear? Can you define them please.