I'm not sure if anyone here has been following the development of this new driver, but this thing is a beast the 13W7 has a one-way linear xmax of 31mm (that's huge). But anyways since the surround goes all the way to the edge of the basket the mounting system is quite unique. www.jlaudio.com has finally revealed how this works and I do have to say it is pretty cool. Go to W7 mounting tutorial to see. I wish I could pick one of these up but they will probably be out of my price range.