Dear Mariusz,
Could you please, inform me something more about the Super15CF sound quality as OpenBaffle?? 
How is the bass? It is low SPL Bass? The treble is hard, hi SPL? etc...
Thankyou, Gustavo
In fact I am running it in OB for break-in purposes.(about 500h by now)
I usually burn-in drivers (and other components/cables) without any initial evaluation.
With that in mind, I can say that (in my smallish room and placement) bass is full and quite satisfactory. However, I can see who the use of quality subwoofer (GR OB sub comes to mind) might be required for those looking at the lowest bass extension...... say below 50-65Hz. I really did not have time to measure its lower extension tho. What I can say is that it is really something else to hear vocals, bass guitar, piano or other string instrument through 15" drivers. It must be heard.
I am sure that you are aware of its 15KHz or so limitation but I for one do not think of it as a huge disadvantage. Middle range is beautiful and its soundstage is great in OB setup.
Again, the last time I have heard them was about a week ago and they are playing non-stop 24h a day. I'll check on them tomorrow and see/hear what changed.
They are also relatively easy to drive.
Mariusz
