Headband headphones series sennheiser hd line type of fitting over ear transmission mode wired features padded headband collapsible sound mode stereo sensitivity 108 dbmw impedance 32 ohm frequency response 20 20000 hz max power handling 500 mw number of drivers 1 distortion factor 0 1 length of cable 2 m type of cable single sided jack 35 mm jack shape straight colour black materials plastic synthetic leather headband earcup mate