Skyline Diffuser

Would be any sound improvement if I put Skyline Diffuser to the wall between Speakers?  Speakers are about 7 feet apart and 15" away from the wall.


Typically some absorbtion or simple diffusion panels are used on the wall between the speakers to improve imaging. A skyline panel in that position may break up the sound waves, an undesirable effect.
You need to tighten the image between the speakers and not dispurse it.