Sennheiser probably needs very little introduction since they are one of the biggest headphone manufacturers around today. Today we will be taking a look at their very latest statement headphone the HD800. These big beasts utilize an entirely new driver design and completely redefine what is possible to do with a dynamic based headphone. What Sennheiser has accomplished with with this new technology is nothing short of remarkable both in terms of performance and price, at a staggering $1400 price tag the HD800s roam the upper stratosphere, alongside headphones like AKG K1000, Stax electrostats and Grado GS-1000.Like the old HD600 type headphones these will require a good headphone amplifier to truly shine, and with the revealing nature of the HD800 sound you will find yourself needing a really good setup in order to be able to fully appreciate what they are capable of, everything comes into play here, source material, DAC, interconnects etc. A very basic setup to power these headphones will probably set you back another $1000.