Audeze lcd 4 open circumaural headphones macassar ebony lambskin leather travel case the lcd 4 audezes new reference headphone is the result of dedicated research and development and advancements in materials science it features our amazingly thin nano grade diaphragms and unique double fluxor magnet arrays for the most powerful magnetic flux density in existence an incredible 15 tesla the lcd 4 represents 40 years of advancements in planar magnetic technology and our own research and devel