Audio



·        Speakers and headphones are the primary audio output devices for aPC. 
 ·        Some monitors have speakers built into their sides. Other speakersare free standing. 

·        Passive speakers plug into and are powered directly from theoutput signal provided by the 'speaker out' port on the sound card. 

·        Active speakers amplify the soundsignal from the sound card using battery or rectified AC house power.