Audio Technica ATH-M50X Headphones + Slappa Case + Headphone Amplifier (Black) AUDIO TECHNICA ATH-M50X Professional Studio Headphones Slappa HardBody PRO Headphone Case for Fold-Down Headphones Black Indigo Portable Headphone Amplifier w/ Bass Boost EQ - Black CRITICALLY acclaimed sonic performance headphones praised by top audio engineers and pro audio reviewers EXCEPTIONAL CLARITY throughout an extended frequency range, with deep, accurate bass response - Proprietary 45 mm large-aperture drivers with rare earth magnets and copper-clad aluminum wire voice coils - Circumaural design contours around the ears for excellent sound isolation in loud environments