音响的主动分音又叫主动分频，是主机的音频信号在经功放电路放大前在主机处理器里进行分频。原理是音频信号到主机处理器(颁笔鲍)，在主机处理器里音频信号按照频响范围分为低频信号和高频信号，再把分好的两路信号各自输入到放大电路里，单独放大。其分频方式是数字式的。
Active audio division, also known as active frequency division, is that the audio signal of the host is divided in the host processor before being amplified by the power amplifier circuit. The principle is that the audio signal is sent to the host processor (CPU). In the host processor, the audio signal is divided into low-frequency signal and high-frequency signal according to the frequency response range, and then the divided two signals are respectively input into the amplification circuit for separate amplification. Its frequency division mode is digital.
被动分音也叫被动分频，是音频信号经功放电路放大后再由被动分频器分频，分别输入到相应的高音或低音喇叭上。原理是由电感电路滤掉高频声音，剩下低频声音，再把低频声音输入给低拼喇叭。由电解电容滤掉低频声音剩下高频声音，再输入给高音喇叭。其分频方式是由可变电阻调整模糊式的。
Passive frequency division is also called passive frequency division. After the audio signal is amplified by the power amplifier circuit, it is divided by the passive frequency divider and input to the corresponding tweeter or bass speaker respectively. The principle is that the inductive circuit filters out the high-frequency sound, leaves the low-frequency sound, and then inputs the low-frequency sound to the low-frequency horn. The low-frequency sound is filtered out by the electrolytic capacitor, and the remaining high-frequency sound is input to the tweeter. The frequency division mode is fuzzy adjusted by variable resistance.
主动分音必 须是主机带主动分频功能或在主机音频输出后加装数字式主动分频器。
Active frequency division must be provided by the host with active frequency division function or a digital active frequency divider shall be installed after the audio output of the host.
主动式喇叭其实很多人都用过，那些随身听的小喇叭就是主动式喇叭，也就是一般的喇叭箱中再加装一组扩大机，当我们要用的时候仅需前级而不需后级。主动式内部采用电子分音方式，并且省去搭配合适的后级的困扰;被动式喇叭就是一般的喇叭，里面只有一分音网络。
In fact, many people have used active speakers. Those small Walkman speakers are active speakers, that is, a group of expanders are added to the general speaker box. When we want to use them, we only need the front stage instead of the rear stage. The active internal use of electronic sound splitting, and save the trouble of matching the appropriate later stage; Passive loudspeaker is a general loudspeaker, which has only a sound distribution network.
主动式前级就是我们一般所见之滨颁、晶体管、真空管之前级，输入信号之后再输出时有放大作用，这种前级较能发挥高动态的表现，随着各机种之特性也有不同的音色。而被动式的前级说穿了简单，就是一个音量控制的衰减器，其输出会小于输入，但音色渲染的情形较少，通常只有轻微的差异，不致像主动式的前级扩大机差异相当大。
The active front stage is the front stage of IC, transistor and vacuum tube. It can amplify the input signal and then output. This front stage can give full play to high dynamic performance, and has different timbres with the characteristics of various models. The passive front stage is simply a volume controlled attenuator, whose output will be less than the input, but there are few cases of timbre rendering, usually only a slight difference, which is not like the active front stage amplifier, and the difference is quite large.
