Audio-Technica ATH-AVC400 SonicPro Over-Ear HeadphonesATH AVC400 The ATH AVC400 headphones are designed to enhance your enjoyment of music and movies. The large 53 mm drivers provide clear but powerful mid low frequency reproduction, while the bass reflex port in each housing delivers an expansive low end. Plus, the soft, contoured earpads not only allow you to wear the headphones comfortably for hours, they also ensure proper isolation that maintains the deep bass sound. The headphones are equipped with