Which speaker should be on top?


I have two speakers which require corner placement: Khorn and TacT W410 subwoofer. Seven foot false corners will be constructed so that the speakers will be 60 degrees apart from the sweet spot and positioned out in the room to get the best imaging. The mid and high horns will be at ear level. This means that the Khorn bass and the subwoofer boxes have to be on the top and bottom. The problem is which should be on the top and bottom? Aesthetically it doesn't matter because everything will be behind a decorative cover. Any suggestons?
redwoodgarden
Subs on top. The K-horn tweeter and midrange does not have a wide vertical dispersion, raising the height signficantly will create significant sound degredation. In addition to this the K-horn needs 3 reflective (bass supportive) walls, thus needs to be on the floor. The tact sub is less critical and actually may benefit from being higher, though without knowing everything else about the room I can't be sure that is true.
Thanks Rives. What else do you need to know about the room?
In general the room dimension is 8/13/17 feet. The room has the ASC isowall acoustic system.