Audio Technica ATH-M50X Professional Studio Headphones (White) & Fiio A3 Portable Amplifier (Black) Bundle Audio Technica ATH-M50X Professional Studio Headphones Fiio A3 Portable Headphone Amplifier Critically acclaimed sonic performance praised by top audio engineers and pro audio reviewers Exceptional clarity throughout an extended frequency range, with deep, accurate bass response 90 swiveling earcups for easy, one-ear monitoring, professional-grade earpad and headband material delivers more durability and comfort. Detachable cable - Circumaural design contours around the ears for excellent sound isolation in loud environments