AUDEZE Audeze EL-8 Titanium w/Lightning Cable (Lightning Connection corresponding Headphone) Type: plane magnetic field, the entire surface of driven, sealed / Magnet type: neodymium magnet Frequency characteristic: 10Hz - 50kHz / maximum output: 130dB, 15W / impedance: 30 / sensitivity 100dB / 1mW Recommended power requirements 200mW - 4W Weight: 460g Accessories: Cipher Lightning cable / headphone cable (2m) /3.5mm stereo mini plug conversion adapter