Audio-Technica ATH-MSR7BK SonicPro Over-Ear High-Resolution Audio Headphones, Black Designed to reproduce Hi-Res Audio, allowing you to hear your music the way it was intended Exclusive 45 mm True Motion Drivers improve transient response and minimize sound distortion for rich, detailed audio reproduction Features multi-layered air damping technology for extended mid-to-low frequency response Housings constructed of an aluminum/magnesium mix provide a lightweight, rigid structure that reduce unwanted resonance Three precisely placed vents within the layers work to control air flow and improve dynamics Highly flexible swivel design, with soft, memory foam earpads and headband ensure comfort even during long listening sessions Stainless steel acoustic mesh resistor provides improved high-frequency response, while bass acoustic resistor delivers accurate low-frequency response