I *guess* that the speakers are too far apart , too close to the side walls to be "stereo". Of course I have not heard your rig.
One way to figure out (or position correctly) is to use test tracks. I like the ledr (Google) test tracks. Use pink noise mono to get a "waterfall" seemingly from the centre - it will not happen if the speakers are too far apart, you will hear two sources with a "hole" in between. The over track is useful to get the toe in right.
Read up on placement, it will be useful. Plenty of sources, and lots on hfv. I had linked to the audiobeat method on one of my threads, maybe useful.
Happy listening.
Edit: I would not suggest going and spending money before getting this position thing done reasonably well. It will make a bigger difference to your listening than pointy things for instance.
Ciao
GR