Kawai SH-9, Headphones, Semi-open design, Circumaural, Drivers: 40 mm, Frequency response: 20 - 20,000 Hz, Max. input power: 1000 mW, Impedance: 47 Ohm, Max. SPL (sound pressure level): 91.5 dB, Cable with 3.5 mm jack plug and 6.3 mm adapter, Weight without cable: 370 g