Sennheiser HD 550Your media is keeping secrets. No, not an encoded bitcoin key or Banksys real name sonic secrets: the faint inhale of a singer, a fretboard squeak, whispered background vocals buried deep in the mix, faraway footsteps in an online game. The HD 550 headphones are your cheat code to hear them all in brilliant detail and lifelike presence. And you dont need a roomful of expensive equipment to access the experience.