Technical Specifications:
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S-Logic Natural Surround Sound
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Dynamic principle, open-back
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Frequency range 10-25.000 Hz
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Impedance 70 Ohm
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Sound pressure level 94 dB
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MU Metal bufferboard, reduced field emissions in accordance with ULE (=Ultra Low Emission) standard
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Driver 40 mm gold-plated
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Weight 292 g (without cord)
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Detachable straight cord (length ca 3m)
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6.3 mm gold-plated plug
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Velvet transportation bag
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Demo CD
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Instruction manual
Character
With the HFI-2400 goose skin feeling is assured. These open-back headphones with Ultra Low Emission (ULE-technology) offer airy and finest 3-dimensional sound reproduction. Specifically designed detachable velvet earpads will comfort your extensive listening hours. The HFI-2400 is the only Ultrasone HFI model with detachable cable. High class gold-plated drivers, placed according to the basic principle of the S-Logic technology, provide highest sound quality.
S-Logic Natural Surround Sound
Through S-Logic Natural Surround, the sound moves out of your head and into the room around you. Consequently, the music is no longer confined, but breathing once again, spacious and organic. Direction and distance are more easily perceived - it's like being at a live concert (?or in the studio). No additional equipment is necessary. So with just a pair of Ultrasones and your favorite audio device, prepare yourself for genuine 3-dimensional enjoyment!
ULE-technology
To understand what ULE-technology does, you need to know that most headphone drivers produce low-frequency magnetic fields as they convert an electric signal into an acoustical signal you hear as music. In response, Ultrasone developed a special MU Metal shielding (ULE-technology) to reduce the radiation by up to 98 percent compared to current headphones. The ULE-technology has stood the test of international review and is recommended by technical surveillance organisations. Ultrasone originally developed the ULE-technology for professionals as they do spend half of their lives in headphones. But due to grand requests the ULE-technology has now been integrated in other Ultrasone headphone lines.
Safer Hearing
S-Logic does not only create a Natural Surround Sound. S-Logic allows at the same time a reduction of sound pressure levels by up to 40 percent (3-4 dB) for the same loudness sensation. This may reduce the risk of hearing damage while ensuring hours of fatigue-free listening. However, Ultrasone generally advises not to listen to music at high volumes to prevent hearing damage.
