If you take a look at the R Series, the Reference and the Blade Uni-Qs, if you look at them from the front they have the same cone size, and that's intentional because we've optimised the size of that cone to work with the tweeter to give the best possible directivity match. But it means from the outside of the product you can't really see the differences in the design. It's only when you look at the back and you look at the motor system that you see now what makes a Blade driver better. So with the R series we have a relatively simple ferrite magnet system, but then stepping up to the Reference we use a neodymium, more powerful, low distortion motor. And then on to Blade we have again a more powerful neodymium magnet but this time with a much bigger 3-inch voice coil.