SONY MDR-M33
¥ 5,500 (around 1987)
Commentary
Semi-open air type stereo headphones equipped with a 30 mm diameter driver unit.
Uses CCAW voice coil and samarium-cobalt magnet.
The cord is an OFC litz wire (one side cord).
In addition, since it uses a cone shield wire type, the cord is not visible and it has a smart design.
The 3-curve wide headband and ear pad are elliptical soft ear pads for a good holding feeling.
Model Rating
| Type | Open air dynamic type |
| Units Used | Φ 30 mm Dome Type (CCAW Adopted) |
| Impedance | 45 Ω |
| Sensitivity | 104dB/mW |
| Max Input | 500mW |
| Playback frequency | 15 ~ 25,000 Hz |
| Weight | 66g (not including cord) |
| Cord Length | 3m OFC Litz Wire (Single) |
| Plug | Stereo 2-way Plug (Gold Plated) |