am·pli·fi·er
noun/ˈæmplɪfaɪə(r)/
/ˈæmplɪfaɪər/
(also informal amp)
- an electrical device or piece of equipment that makes sounds or radio signals louder
enlarge image放大器；扩音器；扬声器 - a 25 watt amplifier
一台 25 瓦扩音器
Oxford Collocations DictionaryAmplifier is used after these nouns:- guitar
- a 25 watt amplifier