Aurex HR-810

Commentary

Condenser type stereo headphone with adapter and plug integrated.

Uses back electret (back electrode electret) system.
In this method, since the diaphragm and the electret are separated, the efficiency of the electret itself can be increased. Moreover, by making the diaphragm thin, the vibration mass can be sufficiently reduced.
In the HR-810, a newly developed high-voltage electret (a special polymer film bonded to a metal plate) is electrically connected to the diaphragm through a high resistance, realizing stable operation of the diaphragm.

The diaphragm is made of polyester film with evaporated aluminum and has a diameter of 51 mm, a thickness of 2.5 microns and a mass of 7 mg.

Matching impedance can be switched by the Adapter part integrated with the plug.
3 positions can be selected for the matching impedance.

Stainless steel core wire is used for the cord part to realize thin yet strong wiring.

Comes with a portable case.

Model Rating

Type	Electret condenser headphone
Headphone Section
Drive system	Push-pull full face drive
Capacitance	60pF
Diaphragm	2.5 micron thick polyester film diameter 51 mm Aluminum double-sided deposition
Frequency characteristic	20 Hz to 30 kHz
Output sound pressure level	95dB/3V (M position)
Maximum sound pressure level	115dB
Harmonic distortion factor	0.5% (at 400 Hz standard input)
Ear pad pressure	250g (Ear Spacing 150 mm)
Code	4-wire 2.5m with stereo plug Core Stainless Steel
Weight	240g (cord not included)
<Adapter part>
Format	Input impedance switching type
Input impedance	H (High) : 1k Ω M (Middle) : 300 Ω L (Low) : 8 Ω
Attachment	Carrying case