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amplifier [amplifiers]▼(anything that amplifies)noun[UK: ˈæm.plɪ.faɪə(r)] [US: ˈæm.plə.ˌfaɪər]
booster [boosters]▼(Something that boosts)noun[UK: ˈbuː.stə(r)] [US: ˈbuː.stər]
preamplifier [preamplifiers]▼(voltage amplifier)noun[UK: prˈiːəmplˌɪfaɪə] [US: prˈiːəmplˌɪfaɪɚ]
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