Mizar 2.5mm Male Plug to 3.5mm Female Stereo Adapter Cable for ipod PDA Stereo sound systems have two or more separate audio signal channels where the signals have specific levels Stereophonic - Of or used in a sound-reproduction system that uses two or more separate channels to give a more natural distribution of sound. Stereo audio uses twice the bandwidth of mono audio because of the two separate channels, with much of the information duplicated on both channels MPEG audio can use conservative methods to maintain audio quality but reduce bandwidth by retaining o