I've been using HS8 monitors for some time and I think they are great!
I am facing a small issue:
There is a difference in bass response of the right and left speaker. Let's say I have a Linn kick, mono sample. There is a strange resonance and less bass depth on the right side, left side is ok. I swapped the speakers and it makes no difference. I am pretty sure that this problem is related to the speakers' placement in the room. I have a treated room (about 50 %), bass traps where possible and foam behind and underneath my HS8. I still cannot figure out what's causing the difference in bass response.
Any help appreciated!