Audio-Technica ATH-M70x Professional Monitor Headphones - Black Amplifier Bundle - Includes Headphones and FiiO A1 Portable Headphone Amplifier All Items Are Brand New - Includes Audio-Technica USA Warranty Includes FiiO A1 Portable Headphone Amplifier M-Series flagship model, tuned for extremely accurate reproduction and carefully crafted using key metal components for lasting durability Proprietary 45 mm large-aperture drivers with rare earth magnetsand copper-clad aluminum wire voice coils Extended response accurately reproduces extreme low and highfrequencies while maintaining perfect balance, Circumaural design contours around the ears for excellent soundisolation in loud environments, 90 degree swiveling earcups for easy, one-ear monitoring