That's about what I'm dealing with. My stepdaughter chose the X-LS Encores with one or two X-Subs but she has a small room so not a lot of wall space for spreading out two stand mounted speakers and two sub boxes. That's why I was wondering about some way of positioning the Encores above the subs even if not directly touching them.
Linkwitz uses a bridge over the woofer box for this in his LX521


But these are open baffle speakers so I don't know if this type of stand would work with the X-Sub since it is down firing and the closed sides of the bridge might pose a problem.
I also thought about a stand with a vertical arm attached to a base and horizontal arm with a platform for the Encore attached to the vertical arm. However the sub would be sitting on the base so it would probably still be transmitting vibration to the Encores.
Not sure how I'm going to pull this one off

Mike