From Longman Dictionary of Contemporary EnglishRelated topics: Recordingamplifieram‧pli‧fi‧er /ˈæmpləfaɪə $ -faɪər/ noun [countable]
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TCRa piece of electricalequipment that makes sound louderSYN ampExamples from the Corpusamplifier• They stole a television, compactdisc player, an amplifier and some speakers, worth a total of 900ドル.• Through an amplifier, the New York maintains its acoustic brightness and bluntly refuses to be anything other than a blankcanvas.• Analysing the series-voltage case first, the open-circuit and loadedvoltagegains of the open-loop amplifier are defined as and respectively.• There is and always has been a yawninggap at the budget end of the amplifier market.• There was no way the amplifier and these cables could live together.• Just another snooty $ 3,000 vacuumtubeamplifier, I thought.• The changes might include a handicapped parking space or a phone voice amplifier.• Below is a six-channel, 600-wattamplifier.