JVC HARX900 HA-RX900 Full-Size Headphones • 50 mm neodymium drivers;• Frequency response: 7 Hz to 26 kHz;• Nominal impedance: 64 ohms;• Ring port structure provides high-quality dynamic sound;• Acoustic lens structure produces natural sound through specially engineered acoustic lenses;• Pressure-dispersion mesh head pad for comfortable long listening;• 11.48 ft. pure copper cord with gold-plated plug to minimize transmission loss;• Includes 1/4 in. plug adapter;