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A woofer is a type of loudspeaker designed to reproduce low-frequency sounds, typically those below 1,000 Hz. Loudspeakers, in general, are electroacoustical transducers that convert electrical energy into audible sound waves. A single loudspeaker cannot reproduce the entire range of audible frequencies, so systems often use multiple speakers. The woofer handles the low end of the spectrum, while a tweeter handles the high frequencies. Woofers are usually larger than tweeters to effectively move the air needed for bass sounds.123

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