@wanderingmoo as I read your second paragraph room reflections was what first came to my mind. You could try something simple to begin with: use some pillows or cushions around your head to create a sort of narrow listening cone towards your speakers. If that seems to reduce the problem (at least in the midrange and treble) then it sounds like you're on the right track.
Your Magnepan 1.6 speakers would have produced much more directional sound, being a vertical panel and a dipole.
Your Magnepan 1.6 speakers would have produced much more directional sound, being a vertical panel and a dipole.