The new AH-D1100 from Denon, Japan is one of those headphones you will find at a concert hall or a recording studio. Featuring the hybrid resign and aluminum housing to reduce the vibration. The newly developed Acoustic Optimizer adjusts sound pressure balance on both sides of the diaphragm. This pressure balance improves dynamics, bass and low to mid frequency ranges for stunning clarity and detail. The overall headband and earpad designs are structured to stay comfortable. Accessories include a standard plug, 3.5m extension cord, and a carrying pouch.