Yamaha Orthodynamic HP-1 - STEREO HEADPHONES, audiophile quality

For Sale: Mint or near mint condition. Working 100%. The best sound quality I have heard from any set of headphones. Mario Bellini designed.

These headphones have their own Wiki page:  http://wiki.faust3d.com/wiki/index.php?title=Yamaha_HP-1

Technical specifications:

Impedance: 150 ohms

Frequency Response: 20-20,000Hz

Diaphragm: 12 micron polyester

Magnet: sintered ferrite or anisotropic ferrite, 55mm Diameter

Sensitivity: 94dB/mW (Anisotropic model: 96dB/mW)

Rated input: 3w

Max input: 10w

Harmonic distortion: < 0.3% at 90dB SPL

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