英语语法分析

Without a preamp, the soft mute can sometimes mask extremely weak signals.

没有前置放大器，软静音，有时面具极其微弱的信号。

Can I change the preamp cathode or plate resistors to change the gain or tone of my amp?

通过改变前置放大级的阴极电阻或者屏极电阻，是不是就可以改变增益或者音色？

HDD sends control signals to the preamp and the preamp selects the head which HDD needs at the current moment.

硬盘驱动器控制信号发送到前置放大器和前置选择头部硬盘在目前的时刻需要。