M500 Hi-Fi Headphones Light, robust and supremely comfortable, KEF M500 hi-fi headphones are designed for people who are serious about sound. High Resolution Sound The unique technologies that underpin KEF’s passion for creating the most natural possible sound immerse you in the intense clarity and detail of the piece played live: vivid, spacious and exquisitely balanced. Maximum Comfort Precision engineered in aluminium alloy and incorporating KEF’s ingenious multi-directional Smart Hinge, the sturdy lightweight frame securely locates each ear cup in exactly the right position. Memory foam in the breathable ear pads automatically moulds itself to the shape of your ear for a perfect fit. As well as maximising bass performance, this means you can listen in complete comfort for as long as you like. Minimum Noise An acoustic sealing ring in each ‘racetrack’ ear cup provides an excellent seal that cuts out extraneous noise while minimising sound leakage. All you hear is your chosen track in its purest form, while those around you hear virtually nothing. Specification: Driver: 40 mm Frequency Response: 20Hz~20kHz Sensitivity: 103 dB±4dB (IEC-318 at 1KHz) Maximum Input Power: 30mW Noise Attenuation: -20dB Cable Length: 1.3m Connector: 2.5/3.5mm Jack