Mojo, I've just starting messing around with my parametric EQ, which on my receiver allows me to independently control the EQ on each speaker. I went to extremes to hear the difference and i'm now optimistic. In pure mode or/flat the on walls don't sound like they are supposed to but after playing around with the EQ i can start to hear a big improvement. Do you have recommend settings or is that pretty dependent on the reflection/room.

here is a pic of what i'm working with:
[Linked Image from i.postimg.cc]

Lots of speakers from many
manufactures...mostly Axiom