Got this in the mail several days ago. Not sure exactly what I am going to do with it but couldn't pass on the price.
It will run at full range till it rolls off the frequency at the higher end. Why not suspended from the ceiling facing upwards a few so inches away from the reflected ceiling surface are we starting to get the idea?
Use anything but that Dolby DSU/dts upmixer it sounds dreadful! Its okay as discrete Atmos, but the upmixers are lousy. Use an external matrix decoder on the surrounds to create a centre and matrix ambiance or effects with the rear surround from the decoder its a lot more fun.
So yeah fit up on the ceiling in free air it will or should have defused sound spread facing upwards at certain frequencies.
I'd fit up 15" JBL if I could find a good stud to screw into for firm suspension. I have small Kef SP1014 used at present for testing as its lighter-weight.