NuForce HP-800 Black Monitor-Quality Classic Style Headphones Clear, rich and precise sound signature for natural warmth and visceral low end Aluminum die-cast housing for minimized resonance and improved articulation Concave body design for lifelike sound staging and focused imaging Precisely tuned, low-distortion 40mm neodymium drivers Breathable, skin-like ear-cups with memory foam inserts for comfortable extended use Connectivity technology : Wired