What Yamaha has to say:
Comfortable closed headphones with a pleasing sound quality, delivering powerful sound and rich tone
Product Specs:
Driver TypeDriver UnitImpedanceMaximum InputSound Pressure LevelFrequency ResponseWeight (with Cable)Cable LengthConnectors HPH-100 Headphones / Earphones Driver Type Dynamic, closed back Driver Unit Φ40 mm Impedance 46 ohms Maximum Input 1,000 mw Sound Pressure Level 103 dB Frequency Response 20 Hz - 20kHz Weight (with Cable) 148 g with cable Cable Length 2.0 m (Single Cable) Connectors 3.5 mm (1/8") stereo, 6.3 mm (1/4") stereo