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Subwoofer

A subwoofer (or "sub") is a woofer, or a complete loudspeaker, which is dedicated to the reproduction of low-pitched audio frequencies known as bass. the typical frequency range for a subwoofer is about 20–200 hz for consumer products, below 100 hz for professional live sound, and below 80 hz in thx-approved systems. subwoofers are intended to augment the low frequency range of loudspeakers covering higher frequency bands.