In ear headphones series sennheiser cx line type of fitting in ear transmission mode wired features gold plated jacks sound function passive noise reduction sound mode stereo sensitivity 119 dbmw impedance 28 ohm frequency response 17 20000 hz number of drivers 1 distortion factor 05 length of cable 12 m types of cable symmetrical double sided jack 35 mm jack shape l shaped colour white earcup colour white ear pad colour white ea