The requirement for high sensitivity meant no damping was used,
beats by dre, the sound quality was crude. in the case, also had very poor comfort compared to modern types,
monster beats, usually with no padding and too often having excessive clamping force to the head. Its impedance varied,
beats, headphones used in the work of the telegraph and telephone had an impedance of 75 ohms. Those used in wireless radio at the beginning was to be more sensitive and has taken several turns of fine wire, impedance from 1000 to 2000 ohms was common,
beats dr dre, suitable for both sets of crystal triode receptors.
----------------------------------------- BODY - ------------------------------------->