I'm considering adding a pair of Neumann KH120 as a near field option in my listening room. Currently I'm 10' from my Salon2s. I'm wondering if adding the actives 3' behind my head and level with my ears would have issues due to the back of the couch. My thinking is that at 3' from my ears, the back of the couch shouldn't matter. Is that true? Are there other reasons why having the speakers behind me is problematic? The intention is to listen to one pair or the other at a time, not together. My motivation is to hear a flat response without my room adding at that distance. (Yes, I know EQ is an option, but I'm vetting this one, before I go down that rabbit hole.) What's right and wrong about this train of thought? Thanks.