Originally Posted by
jmpsmash
My best guess is the mismatch in dispersion between the 2397 and top end of the 2216ND1. I haven't done any off axis measurement for either. However, we know that 2397 go as wide as 160deg. I am betting that 2216ND1 narrow quite a bit at the high end. Since I only tuned them on axis, which may mean at crossover region, a lot more energy is projected into the room by the 2397 than the 2216ND1. My room has a decent amount of acoustic treatment with absorption at front and side wall. But still not gonna get rid of them.
Time to do some off axis measurements to confirm.