The Denon AH-D2000 are headband headphones that feature a frequency response of 5 Hz - 45 kHz and 106 dB sensitivity, so that they deliver clear sound and great listening experience. The Acoustic Optimizer technology on these headphones, improves dynamic bass by adjusting sound pressure balance on both sides of the diaphragm. In addition, they come with wired connectivity and weigh 350.97 gram.