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Foldable, open-back high-quality headphones in black, silver and
grey with Aluminium nameplates and fines 3-dimansional sound
reproduction.
Technologies:
- S-Logic® Natural Surround Sound
- MU Metal shielding (ULE-technology)
- Safer hearing
Specifications:
S-Logic® Natural Surround Sound
Dynamic principle, open-back
Frequency range 10-25.000 Hz
Impedance 70 Ohm
Sound pressure level 94 dB
MU Metal bufferboard, reduced field emissions
in accordance with ULE (=Ultra Low Emission) standard
Driver 40 mm gold-plated
Weight 292 g (without cord)
Detachable straight cord (length ca 3m)
6.3 mm gold-plated plug
Velvet transportation bag
Demo CD
Instruction manual
Long-term availability of spare parts
Character
You are looking for an open-back HFI model? 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.
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% 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.
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!
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% (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.
Download PDF
For more information, click here | 
