Sennheiser’s HD 800 headphones is the top of the line in audio. Priced at $1400 the HD 800 is for the user with who wants the best and can afford it. Sennheiser claims that they have developed a ultimate class in headphones with huge 56mm drivers that deliver a frequency response of 6 to 51,000Hz along with specially created stainless steel gauze (reduces vibration) and silver-plated copper wires shielding it from electromagnetic interference.