Aurex HR-D3
¥ 5,500 (around 1976)
Commentary
This headphone was developed by applying the know-how obtained with the condenser type to the dynamic type.
The diaphragm is a cone-type speaker using a polyester film with a diameter of 5.7 cm and a thickness of 50 microns.
The case is semi-open air to eliminate the sense of sealing.
Model Rating
Type | Dynamic headphone |
Units Used | 57 mm Cone Type |
Impedance | 8 Ω |
Frequency characteristic | 20 Hz to 20 kHz |
Output sound pressure level | 106B/mW |
Maximum sound pressure level | 136 dB (Allowable Input 700 mW) |
Harmonic distortion factor | 0.5% |
Ear pad pressure | 240g (Ear Spacing 150 mm) |
Code | 4-wire 2.5m vinyl cord with stereo plug |
Weight | 235g (cord not included) |