Each of
Yamaha's exciting new headphones has been designed to offer an optimum blend of
high-fidelity music reproduction, sonic efficiency, and extended fatigue-free
music enjoyment. The most immediately striking aspect of the YHD-1 Natural Sound Stereo headphones is the sophisticated new design by Mario Bellini, a world-famous designer highly appraised for his ergonomic
"human-engineering" approach to styling. Bellini's new design enables
the YHD-1 to be worn for hours on end without a trace of fatigue. Yet
the deeply detailed musical transients and exciting sound dynamics are both
products of Yamaha's exclusive Orthodynamic design.
These
headphones are also remarkably efficient, meaning that they deliver generous
levels of sound output with astonishingly low levels of distortion from
comparatively low input levels. When used with portable headphone stereo
players with minimal output levels, they deliver truly larger than life
performance.
Minimal
fatigue design by Mario Bellini.
The striking
new design by Mario Bellini is characterized by the headphones fitting closer
to the head. Materials have been carefully chosen to pare the total weight of
these headphones down to minimal levels. The Yhd-1 weight just 145 grams. With its well ventilated design, the lightweight
two-piece headband provides a comfortable fit as well as a sophisticated
appearance. The headband attaches to the leading edge of the drivers, allowing
the drivers to rest naturally against your ears. Most of the headband pressure
comes to rest on the part of your head just in front of your ears, rather than
on your ears themselves. The ear pads
flip open slightly to rest comfortably over the entire surface of the ear for a
truly weightless feel.
How Yamaha's
Orthodynamic Design creates better sound.
Despite
widely differing acoustic conditions for headphone sound reproduction, most
headphone designs just use loudspeaker-type drivers that have been scaled down
for headphone use. Yamaha took a completely different approach, designing the
entire headphone driver unit from scratch. The result was our orthodynamic
design. It consists of two sintered ferrite magnets with a combination voice-coil/diaphragm sandwiched in between. The YHD-1 incorporates special anistropic-type magnets for even sharper
response and higher efficiency.
Magnetic
Flux and the Voice Coil / Diaphragm.
The
disc-shaped driver magnets are actually sets of distinct magnets, coaxially
arranged with each successive one in opposite polarity. In between, there is a
combination voice coil/diaphragm constructed of super-thin lighweight polyester
film only 6 µm thick, corrugated in the direction of movement for optimum
compliance. It's fixed only at the outside edge for maximum freedom of
movement. This diaphragm is printed with aluminum voice coils wound in opposite
direction, so that the diaphragm 'breathes" back and forth in precise
response to the music signal. Openings in both the disc driver magnets and the
driver body permit the air flow necessary for unimpeded diaphragm movement for
strong bass response, while felt and urethane foam damping materials provide
optimum load to the diaphragm for natural sound response over the entire
audible spectrum.
Your ears
will tell you what the specs confirm.
Both of
these headphones deliver extremely well balanced response across the entire
audio spectrum - 20 Hz all the way up to 20,000 Hz. The output sound pressure
level, which is the amount of sound produced for the power input, is a spectacular 100 dB/mW for the YHD-1.
performance this efficient enables you to enjoy genuine Yamaha naturas Sound
fidelity even with today's popular portable headphone stereo players. Indoors
or out, you'll never be without the finest sound quality ever possible from a
headphone.
Specifications YHD-1
Impedance: 125 Ω
Magnet
Diameter: ø38 mm (1 ½")
Magnet
Material: Anisotropic Ferrite
Diaphragm
Diameter: ø38 mm (1 ½")
Diaphragm
Film: 6 µm Polyester
Frequency
response: 20 - 20,000 Hz
Output
SPL: 100 dB/mW (109 dB/V)
Rated
Input: 1 W
Cord: 2,4 m (8 ft.) straight
Weight
[cord/without cord]: 167 g (5,9 oz) /
145 g (5,1 oz)
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