The headamp 3 is the world's reference tubed headphone amplifier. It is unique in its ability to power electrostatic, magnetostatic and dynamic headphones. With multiple inputs and remote control, this is the most serious headphone amplifier in existence. The sound quality is incredibly textured, layered and nuanced with any headphone but really excels with Stax and Audeze products. For the serious headphone connoisseur looking for ultimate purity and pride of ownership. Handcrafted in Germany.