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

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？

This is a low impedance discrete level control which sits between the preamp active circuitry and the input to your power amplifier.

这是一个位于前级有源电路和后级放大器输入端之间的低阻抗的音量控制。

The technical development of the preamp circuit, signal processor, power amplifier and loudspeaker driver are described below.

阐述了前置放大器电路、信号处理器、功率放大器、扬声器驱动器的技术发展。

The parts that were changed in the preamp itself.

这些部件被改变放大器本身。

Design and Implementation of a Program Control Broadband Preamp Amplify System

可预置程控宽带放大系统的设计与实现

Design& Application of auto electrical level control preamp circuit

自动电平控制前置放大电路的设计与应用

I participate in the design work of a metro broadcast system project, and responsible for the preamp hardware design.

本人主要参与了某地铁广播系统的设计工作，并且负责完成前级放大器的硬件设计工作。

The portents cannot be ignored.

这些征兆不可忽视。

But there is an argument for looking at such oddities as portents for the future.

但是，有理由将这样怪异之事视为未来走向的征兆。

The downgrading of some of its banks this week was a portent of that.

一些德国银行本周信用评级被下调就预示着这种情况的发生。

According to Dong, Confucius understood the relationship between man and nature and therefore the way to interpret portents and omens.

根据董仲舒的看法，孔子深谙人与自然之间的关系，因而也知道如何解释征兆。

It is they who interpret the portents and thus exercise a check on the policies of the ruler.

正是儒家学者解释了征兆，从而检查了统治者的政策。

Amazed that he ignored the portents for so long.

对他这么长时间忽视这些预兆感到惊讶。

These records are generally made of portents and validations based on the cause-and-effect relationship between the two.

征应的产生建立在二者之间的因果关系上，可以分为“有征必有应”和“有应才有征”两种。

Is it true that cows lying down in a field are a portent of rain?

母牛躺在田里就预示着要下雨，这是不是真的？

Based on the analyses for portent information of power sytem failures, This paper proposes a hierarchical causal diagnostic model.

本文分析了电网故障时所表现出的故障征兆信息的特点，在此基础上提出一种分层因果智能诊断模型，这种方法有更好的适应性。

Many are the portents and the signs.

这里有太多太多的征兆和迹象。

Whether that number should be seen as a portent, of course, is too soon to tell.

当然，现在要说这个数字是否应该视为一种征兆，还为时尚早。

But did your reverence hear of the portent that was seen last night?

不过，阁下您听说昨天夜里人们看见的征兆了吗？

This turns out to be a portent of one of the biggest changes since the 1960s.

结果发现这是1960年代以来最大变化的一个预示。