Audio-Technica ATH-AD700X Audiophile Open-air Headphones usb-b male There is an aperture on

There is an aperture on the back of the housing which act to extend the reproduction band of low frequencies

With the driver unit

It gives you

pivotable gooseneck for optimal positioning

Audio-Technica ATH-AD700X Audiophile Open-air Headphones usb-b male There is an aperture on53mm Driver Open Back Dynamic Headphones Audio Technica ATH AD700X Audiophile Open air Headphones Introducing Audio Technica ATH AD700X Audiophile Open air Headphones. With a lightweight honeycomb aluminum casing, these open air headphones produce no sense of pressure on the ears, offering a completely natural listening experience. Newly designed 53 mm drivers with bobbin wound CCAW voice coils deliver spacious sound with superior highs and mids. The