Datasheet

Short description
Foldable, closed-back high quality headphones
with very exclusive design and extraordinary sound,
offering the highest standard of technologies:
S-Logic™ Natural Surround Sound Plus
MU Metal shielding (ULE-technology)
Safer hearing
Technical specifications
S-Logic™ Natural Surround Sound Plus
Dynamic principle
Frequency range 15-25.000 Hz
Impedance 75 Ohm
Sound pressure level 99 dB
MU Metal bufferboard, reduced field emissions
in accordance with ULE (=Ultra Low Emission) standard
Driver 40 mm gold-plated
Weight 285 g (without cord)
Straight cord, length ca 3 m
3,5/6,3 mm screwable gold-plated plug
Transportation bag
Demo CD
Instruction manual
Long-term availability of spare parts
Character
Eye-catching exclusive design and sand-grey coated. The HFI-680 catches the eye and
enjoys your ears with an extraordinary balanced, natural and detailed sound image.
Experience the complete isolation of closed-back headphones and the honest sound of
open ones. The high class gold-plated drivers of the HFI-680 are very sensitive and
provide a maximum of transparency.
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.
Pure Reality
HFI-680