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.
Technical 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