The headphone is constructed very solidly in metal. Gone are the hidden squeaky cup swivel system that are on the K701, the K812 comes with a metal, 2 way swivel for the same movement without any noise. The removable cable is a 3 pin metal spring loaded connector on the headphone side but a cheap rubber thread 3.5mm plug on the other end. The cable is also less than spectacular, similar to the rubbery, springy type on the K701 but seems to be even thinner; the thinner flexible cable does offer superior comfort to other heavier and stiffer cable on other high-end headphone, but surely feels less premium.
The comfort is excellent with a well-designed ear pad system and the familiar suspended headband. Unlike the K7XX, the headband doesn’t suspend on a spring as such. It is just like any other headphones and have stepped adjustment system.