low-frequency preamplifier

例句：

1. 1. The low-frequency preamplifier is used to amplify the weak signals from the sensors.
   低频前置放大器用于放大传感器的微弱信号。
2. 2.In audio engineering, the low-frequency preamplifier plays a crucial role in enhancing the sound quality.
   在音频工程中，低频前置放大器在提升音质方面起着至关重要的作用。
3. 3. The engineer carefully selected the components for the low-frequency preamplifier to ensure optimal performance.
   工程师仔细选择了低频前置放大器的组件，以确保最佳性能。