- an electronic amplifier used to improve the signal-to-noise ratio of an electronic device. It boosts a low-level signal to an intermediate level before it is transmitted to the main amplifier
| 单词 | preamplifier |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 pre•am•pli•fi•er (prē am′plə fī′ər),USA pronunciation n.
Collins Concise English Dictionary © HarperCollins Publishers:: preamplifier /priːˈæmplɪˌfaɪə/ n
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