Professional circumaural hi-fi stereo studio headphones Self-adjusting headband for optimum fit Patented Varimotion speakers High noise attenuation For onstage and studio use Automute feature mutes headphones when they are taken off Leatherette and additional velvet ear pads Single-sided, detachable 3 m cable and additional 5 m coiled cable The newly designed AKG legend, K 271 MK II combines the benefits of AKG’s circumaural design for extreme comfort and a closed-back design for maximum isolation from ambient noise. Thanks to its XXL transducers, the K 271 MK II sounds clean, smooth and very rich. The K 271 MK II is the perfect choice for any application where sonic bleed could cause problems such as broadcast work. Another important feature of the K 271 MK II is the addition of a switch in the headband that mutes the audio just as soon as the headphones are taken off.Type closed-back, dynamic headphones Sensitivity 91 dB/mW, 104 dB/V Frequency range 16 to 28,000 Hz Rated impedance 55 ohms Max. input power 200 mW Earpads leatherette und velvet Cable 3 m single-sided and 5 m coiled cable (99,9% oxygen-free); plug-in cable on headphones (mini-XLR connector) Connector gold plated stereo mini jack Adapter gold plated 1/8" to 1/4" screw-on adapter Net weight (without cable) 240 g (8.5 oz.) Shipping weight 550 g (19.4 oz.)