Yamaha HP-1 Orthodynamic Headphones

Special consideration will be given to offers from buyers willing to pay via USPS Money Order. Thank you.

Offered for sale is this incredible pair of Yamaha HP-1 orthodynamic headphones. Designed by Marco Bellini, these are incredibly sought after and originally retailed for $200 back in the late 1970s (adjusted for inflation, that's around $800.00 in 2012 dollars). These are an estate sale find. I don't know the usage history behind these and don't have any of the original packaging or documentation. But, they sound phenomenal and are in pristine cosmetic condition as well. If local to the greater D.C. area, you are more than welcome to give these a test run. There is a wealth of information available on this model online. Here is some text from the Yamaha Japan website (translated, so it may not make the most sense):

Headphone, dynamic ortho type "HP-1 (HS one copy)." HP-1 was designed the Italian designer, Mario Bellini, had played a role as the orthodox school to reproduce the natural sound quality. Ortho technology system dynamic, voice coil which is the source of headphone vibration has been integrated into the spiral to (diaphragm) diaphragm of sources. HP-1, was realized as it is to shape the structure of the driver unit, a minimalist design. In addition, by and distributed to the head two bands, reducing the load on the user to install in HP-1, the role of these two "headphone hit plays to the ear" ear pads "support in the head the headphones" that.