Music professionals revere AKG's award winning K242 Studio headphones for their outstanding performance & exceptional comfort, & the ideal choice for any application demanding totally uncoloured sound. The K242HD semi-open headphones continue the tradition, with a super comfortable lightweight design & extra large speakers with Varimotion diaphragms for high sensitivity, wide dynamic range & high sound pressure levels. These headphones are everything that 1, 500 technology patents & 60 years of feed back from the world's leading performing & recording artists can make them. Around ear, semi-open design Self adjusting headband comfortably conforms to your head Gimbal suspended phones settle against ears without pinching Ultra soft velvet earpads High efficiency output with wide dynamic range, perfect for mobile environments Single sided, 99.99% oxygen free cable for pure sound transmission Hard gold plated contacts & plug with 3.5-6.3 mm adaptor