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-2 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 and YHD-2 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.
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-2 uses isotropic 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
remarkable 97 dB/mW for the YHD-2, and 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-2
Impedance: 125 Ω
Magnet
Diameter: ø38 mm (1 ½")
Magnet
Material: Isotropic Ferrite
Diaphragm
Diameter: ø38 mm (1 ½")
Diaphragm
Film: 6 µm Polyester
Frequency
response: 20 - 20,000 Hz
Output
SPL: 97 dB/mW (106 dB/V)
Rated
Input: 0,7 W
Cord: 2,4 m (8 ft.) straight
Weight
[cord/without cord]: 155 g (5,6 oz) /
133 g (4,7 oz)
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