Audio-Technica ATH-M50x Monitor Over-Ear Headphones (Black)Overview Pure. Professional. Performance. The ATH M50x features the same coveted sonic signature as its predecessor, the ATH M50, with the addition of three interchangable cables. Proprietary 45 mm large aperture drivers with rare earth magnets and copper clad aluminum wire voice coils ensure a pure listening experience. Isolating earcups swivel 90. Collapsible design and included carrying pouch make for easy storage. Critically acclaimed M Series