Avantone Planar Black, Headphones, Featuring planar magnetic driver technology, Open design, Supra-aural, 21 Micron PET diaphragms, Size of the drivers: 70 x 95 mm, Frequency response: 30 - 30,000 Hz, Impedance: 32 Ohm, Max. power handling: 5W RMS, Sensitivity: 104 dB / mW, Total harmonic distortion (THD):