I'll bet there is an optimum distance to get the speakers sounding correct.
They have a 10 degree neg caster. When you raise them you'll have to pull them closer to get the same, 10 degree exposure. Right?
Of axis response would be have to be pretty good... I suppose if you raise and tip forward that would work also.
Three feet, a triangle, Cut 4 triangles out of 3/4 MDF, each one smaller than the one before. The top one the proper size to fit under the speaker. Route the tops of all the pieces. Stack and glue, a step style pedestal. You can use Hardwood, too, different types (colors). Cut, glue and stack, wipe, let dry, sand, and stain.. Add rubber feet from PE..
I modified bookends for a pair, at the wife's work years back. Buddha had a crown of speaker, looked cool.
Regards