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  1. preamplifier

    • IPA[prēˈampləˌfīər]

    美式

    • n.
      an electronic device that amplifies a very weak signal, for example from a microphone or pickup, and transmits it to a main amplifier.
    • noun: preamplifier, plural noun: preamplifiers

    • 更多解釋
    • IPA[priːˈamplɪfʌɪə]

    英式

    • n.
      an electronic device that amplifies a very weak signal, for example from a microphone or ...

    Oxford Dictionary