Audio Technica Matte Grey Professional Headphones with FiiO E6 Amp ATH-M50XMG This Kit Includes Some Of The Essential Accessories You Need To Take Full Advantage Of Your New Audio-Technica ATH-M50x Professional Studio Monitor Headphones Critically acclaimed sonic performance praised by top audio engineers and pro audio reviewers. &gt; Proprietary 45 mm large-aperture drivers with rare earth magnets and copper-clad aluminum wire voice coils Exceptional clarity throughout an extended frequency range, with deep, accurate bass response 90 swiveling earcups for easy, one-ear monitoring FiiO E6 Headphone Amplifier for high impedance or low sensitivity Hi-fi headphones