samelightNope. Not based on the 702's. They're based on something that's a cross between the 702 65th anniversary ($400 cans) and the 712's. It's been discussed in depth down below.
samelightActually you are incorrect sir. The K7XX is supposed to be a rebrand of the K712 Pro, but they are different acoustically. The HD6XXs are exactly the same as the HD650s, nothing on those was changed besides the color.