Designed for hours of fatigue-free listening, the AH-D1100 over-ear headphones feature remarkably light weight (6.7 oz., cable not included) along with a host of exclusive Denon technologies for the ultimate in audio fidelity & listening comfort. Denon’s Acoustic Optimizer technology provides balanced acoustical pressure on both sides of the large 50mm diaphragms, which are powered by advanced neodymium magnet motor systems. Unlike conventional headphones, the AH-D1100 features internally angled drivers which provide superior aural matching with the ear canal for the ultimate in audio fidelity. The large diameter 50mm drivers provide extended frequency response up to 37 k Hz for the utmost fidelity with wideband audio sources such as lossless FLAC, Dolby True HD & DTS-HD Master Audio, & also provide tremendous reach down to the very lowest bass notes.