SPECIFICHETypeclosed-back, dynamic headphones Sensitivity94 dB/mW, 107 dB/V Frequency range18 to 26,000 Hz Rated impedance55 ohms Max. input power200 mW Earpadsleatherette and velvet Cable3 m single-sided and 5 m coiled cable (99,9% oxygen-free); plug-in cable on headphones (mini-XLR connector) Connectorgold plated stereo mini jack Adaptergold plated 1/8" to 1/4" screw-on adapter Net weight (without cable)200 g (7.1 oz.) Shipping weight500 g (17.6 oz.) Patent(s)Varimotion – multiple-thickness diaphragm for dynamic transducer (Patent no. AT 403.751, US 6,185,809, EP 814.637 (DE, DK, FI, FR, GB, IT, NL), JP 3.927.651); Acoustics slot resistor for dynamic transducer (Patent no. AT 408.706, US 6,639,991, ZL 01116806)