Type : closed-back, supraaural dynamic headphones
Sensitivity : 94 dB SPL/mW
Frequency range : 18 to 26.000 Hz
Rated impedance : 55 ohms
THD : <0.4%
Cable : plug-in, 99.99% OFC single cable, approx. 3 m (10 ft.)
Connector : gold plated stereo mini jack
Adapter : gold plated mini to 1/4" screw-on adapter jack
Net weight : (without cable) 200 g (7.1 oz)
Special features : plug-in cable with mini XLR connector
Patent(s) : Varimotion – multiple-thickness diaphragm for dynamic
transducer(Patent no. AT 403.751, US 6.185.809)
Acoustic slot resistor for dynamic transducer (Patent no. AT 408.706)
K 271 Studio
Type : closed-back, circumaural dynamic headphones
Sensitivity : 91 dB SPL/mW
Frequency range : 16 to 28,000 Hz
Rated impedance : 55 ohms
THD : <0.3 %
Cable : plug-in, 99.99% OFC single cable, approx. 3 m (10 ft.)
Connector : gold plated stereo mini jack
Adapter : gold plated mini to 1/4" screw-on adapter jack
Net weight : (without cable) 240 g (8.5 oz)
Special features : plug-in cable with mini XLR connector
Patent(s) : Varimotion – multiple-thickness diaphragm for dynamic
transducer (Patent no. AT 403.751, US 6.185.809)
Acoustic slot resistor for dynamic transducer (Patent no. AT 408.706)