Definition of "subwoofer" [subwoofer]

• An electronic speaker designed to produce low-frequency sound, especially bass. (noun)

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• "He read somewhere there are headphones that have a built-in subwoofer or something."
• "- Maximum Sound Output of 80 Watts – Headrest speakers with a built-in subwoofer deliver high-performance sound."
• "This homemade Death-Star-shaped subwoofer is for sale on eBay -- the winning bidder to pick it up from near Reading, England."