一&尘颈诲诲辞迟;信号源
I. signal source
功放的作用就是把微弱的电平信号源放大输出给音箱，然后由音箱里的喇叭单元的振动的频率快慢来发出各种频率的声音，也就是我们听到的高、中、低音，如果信号源有杂音（失真）或通过压缩以后丢失了某些信号成分，通过功放功率放大以后，这些杂音就会放大的更大，丢失的成分就放不出来，所以在我们评价音响时用的音源好坏很关键
The function of the power amplifier is to amplify and output the weak level signal source to the speaker, and then send out sounds of various frequencies according to the vibration frequency of the speaker unit in the speaker, that is, the high, medium and low tones we hear. If the signal source has noise (distortion) or some signal components are lost after compression, after amplification by the power amplifier, These noises will be amplified more, and the lost components will not be released, so the sound source used in our evaluation of sound is very important
二&尘颈诲诲辞迟;器材本身
II. Equipment itself
也就是说功放要信噪比高、有效频响要宽、失真度底，音箱有效频率要宽、频响曲线要平坦，频响能达到20贬锄--20碍贬锄的音响可以说是很不错的，目前一只音箱能达到20贬锄--20碍贬锄+3%诲叠的是少之又少，市面上有好多音响说高频能达到30甚40碍贬锄,这说明音响品质是在不断的进步，但是我们正常人的耳朵超过20碍贬锄以上的信号是很难分辨出来，所以追求一些我们听不到的高频也没必要，只有频响宽曲线平坦才能逼真的再现原声，功率方面就要看使用面积的大小而定，要成正比，如果面积太小功率太大，声压一大就会造成太多的反射声，使音色变得浑浊不清，反之则声压不够。功放功率比音箱功率在阻抗匹配时大20％到50％这样低音会结实有力些，中高音层次会较清晰，声压大时没那么容易失真
In other words, the power amplifier should have high signal-to-noise ratio, wide effective frequency response and low distortion. The effective frequency of the speaker should be wide and the frequency response curve should be flat. The sound with frequency response of 20Hz-20KHz can be said to be very good. At present, few speakers can reach 20Hz-20KHz + 3% dB. There are many sound systems on the market that the high frequency can reach 30 or even 40KHz, indicating that the sound quality is constantly improving, However, it is difficult to distinguish the signals above 20kHz in our normal ears, so it is not necessary to pursue some high frequencies that we can't hear. Only the wide frequency response curve is flat can we reproduce the original sound realistically. The power depends on the size of the use area, which should be in a positive ratio. If the area is too small and the power is too large, a large sound pressure will cause too many reflected sounds, Make the timbre turbid, otherwise the sound pressure is not enough. The power amplifier power is 20% to 50% higher than the speaker power in impedance matching, so that the bass will be stronger, the middle and high levels will be clearer, and it is not so easy to be distorted when the sound pressure is high
叁&尘颈诲诲辞迟;使用者本身
III. users themselves
有些人买音响是为了摆设，有些人是为了欣赏音乐、还有一种是为了显耀，简单点说如果一个人如果连高低音都分不清楚的话，能听出什么是好的音质吗？除了会听还得会用，有些人音响装好后，安装技师调好效果简单讲讲，结果是有不小心谁好奇去动了一些旋钮，效果大家就可想而知了，这里并不是说要懂什么技术，就像我们开车一样起码要弄懂各个开关、按钮、旋钮是什么作用，才能发挥这个车的性能和使用安 全。
Some people buy stereos for furnishings, some people for music appreciation, and others for fame. To put it simply, if a person can't distinguish between high and low tones, can he hear what good sound quality is? In addition to being able to listen, some people have to be able to use it. After the stereo is installed, the installation technician adjusts the effect and gives a brief talk. As a result, one day, someone accidentally moves some knobs, and the effect can be imagined. This is not to say that we need to understand any technology. Just like driving, we should at least understand the function of various switches, buttons and knobs, In order to give full play to the performance and safety of the car.
四&尘颈诲诲辞迟;使用环境
IV. use environment
大家都知道空房间没住人时，击掌、说话时回音特别大，这是因为房间六面没有吸音材料或吸音不够，反射声造成的。音响也一样，如果吸音不好放出来的声音就不好听，尤其是声音稍大就会很浑浊刺耳，当然有些人说家里不可能搞的象试音室一样，其实只要下一点心思、花点钱就能搞好比如：在面积较大的墙面挂一幅刺绣图画有好看又吸音，玻璃窗挂厚一点的棉质窗帘，在就是地面上铺地毯，哪怕是地面中间铺一块装饰地毯效果都会出人意外，如果要做的更好可在墙上或顶吊一些软性不光滑的装饰品，既美观，又减少反射，一举两得。
We all know that when there is no one living in an empty room, the echo is particularly loud when clapping and talking. This is because there is no sound-absorbing material on the six sides of the room or the sound absorption is not enough, resulting in the reflected sound. The same goes for the sound system. If the sound absorption is not good, the sound released will be bad, especially if the sound is a little loud, it will be very turbid and harsh. Of course, some people say that it is impossible to build a professional sound testing room at home. In fact, it can be done well as a little thought and money. For example, hanging an embroidered picture on a large wall has good-looking and sound absorption, and hanging thicker cotton curtains on the glass window, If you want to do better, you can hang some soft and unsmooth decorations on the wall or top, which is not only beautiful, but also reduce reflection and kill two birds with one stone.
