Audio-Technica ATH-WS770iSGM Solid Bass Over-Ear Headphones, Gun Metal 53mm Deep Motion Drivers to achieve extremely rich, high-fidelity bass sound. Top-mounted PCB to equalize the air pressure behind the diaphragm for balanced sound with low distortion. Airflow Bass Triple Venting System ideally positioned to optimize air damping inside the housings for rich bass sound. Aluminum finishing for anti-vibration to produce clear mid-high frequencies. In-line control with mic for handling calls and controlling music and video playback.