Here you can find two galleries. Links are Finnish, but just click them. My friend owns the sub, I just made the measurements and gave my opinion about the sound. Room is very small, less than 1500cu.f. Concrete all over and that makes it sound a littlebit boomy and undetailed. He is thinking of buying BFD some day, that should help a littlebit. First graph is sub+mains. Second graph is sub only xo 100Hz.