Ultrasone HFI-650. Excellent STEREO HEADPHONES of very high quality from experienced German designer. S-Logic Technology: Invention not improvement. The patented S-Logic technology of Ultrasone uses decentralized transducer positioning to reflect sound off the listener's outer ear creating a natural three dimensional sensation. Unlike standard headphones which create the impression of a stereo image inside the listener's head Ultrasone headphones with S- Logic produce a stereophonic surround sound field that is perceived to be broad detached and located in front of the listener. Safe hearing protection: The S-Logic system reduces sound pressure levels at the eardrum by up to 40% ensuring hours of fatigue free listening and significantly reducing the risk of hearing damage. Features Closed circum aural headphones. S-Logic Natural Surround Sound. Straight cable cord length 3metres. 3.5 6.3mm screw on gold plated plugadapter. Technical specifications: Frequency range 10Hz- 25.000Hz. Impedance: 75 Ohm. Sound pressure level: 94 dB. 3 5 6 3 mm gold plated plug. Weight (without cord) 350grams.

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