I've been trying to find the high-pass and low-pass filter on these two products, and it seems Yamaha set it at 120 on the DSR 12s? And there is none on the sub? Why would they do that? Couldn't find a lot of info on either, even from Yamaha. Does anyone know the story on these two? I own the DSR 12s. I was just surprised when I was researching both that you couldn't find much, and what I could find didn't seem to make much sense? I realize you certainly want a high-pass on the 12s. Why so high at 120? Why no low-pass on the sub?