- Semi-open, circumaural design - Self-adjusting headband for optimum fit - Patented Varimotion speakers - Leatherette ear pads and velvet ear pads - Single-sided, detachable 3 m cable and additional 5 m coiled cable The K 240 MK II is a newly updated version of AKG’s most successful headphones with Varimotion™ technology and XXL transducers. The K 240 MK II’s semi-open ear cups have around-the-ear coupling to deliver solid bass, accurate mids and crystal-clear highs. Thanks to its lower impedance and improved sensitivity, it can be used with low-output audio sources to deliver its incredible sound. The detachable OFC cable has gold-plated plugs for optimum audio quality and exceptional ease of service.  Type semi-open, dynamic headphones Sensitivity 91 dB/mW, 104 dB/V Frequency range 15 to 25,000 Hz Rated impedance 55 ohms Max. input power 200 mW Earpads leatherette and 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.)