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How Amplifiers Work
Don't leave out the amplifier!
Don't leave out the amplifier!
© 2002 HowStuffWorks

An amplifier may seem like an audio add-on, but your stereo system would be pretty useless without it. Leave out the amp and you'd never be able to hear the music on your CDs (your neighbors might be happier, but would you?). Find out how amplifiers pump it up to 11.

Learn about How Amplifiers Work.