更新時間：2022-07-04
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音響燒了是因為功放質(zhì)量不行嗎？一般人會認為是音量開得太大聲了揚聲器會受不了，因而把揚聲器弄壞，其實不然，有許多種情況都可能，而且，有錯誤的概念。下面來簡單分析一番。
Did the stereo burn out because the quality of the amplifier was poor? Most people will think that the loudspeaker can't stand the volume being turned on too loudly, so the loudspeaker will be damaged. In fact, it's not true. There are many situations that are possible, and there are wrong concepts. Here is a brief analysis.
音響與功率放大器配置不合理
Unreasonable configuration of sound and power amplifier
沒有經(jīng)驗的調(diào)音師會認為，功率放大器的輸出功率太大，造成高音單元的損壞，其實不然。在場合下，揚聲器一般可以承受3倍于額定功率的大信號沖擊，瞬時可承受5倍于額定功率的峰值沖擊而不會有問題的。因而，不是因意外強沖擊或話筒長時間嘯叫，而由功率放大器功率大而燒高音單元的情況是很少出現(xiàn)的。
An inexperienced tuner will think that the output power of the power amplifier is too large, causing damage to the tweeter, which is not the case. In professional occasions, speakers can generally withstand large signal impact of 3 times the rated power, and can withstand peak impact of 5 times the rated power instantaneously without any problem. Therefore, it is rare for the high power amplifier to burn the tweeter instead of accidental strong impact or long-term howling of the microphone.
眾所周知，音響內(nèi)有多個揚聲器，揚聲器所承受的功率，按分頻點的不同進行不同分配。
As we all know, there are multiple loudspeakers in the sound, and the power borne by the loudspeakers is distributed differently according to the different frequency division points.
音響的額定功率，一般音響標(biāo)明很大粉紅噪功率，也就是說，音響的額定功率是指粉紅噪聲或?qū)掝l帶能承受的模擬信號功率。一只分頻點為1.6kHz、額定功率為100W的二分頻音響，在額定功率時，低音單元可分配到78W的輸出功率，而高音單元僅分配到22W。因此，對該音響施加100W的粉紅噪聲功率或普通節(jié)目信號功率，它可以承受；而用100W的單頻信號去測試時，無論高音和低音單元都有可能損壞。
The rated power of the sound, generally professional sound marked with a large pink noise power, that is, the rated power of the sound refers to the pink noise or the analog signal power that the broadband can withstand. A two division sound with a frequency division point of 1.6kHz and a rated power of 100W. At rated power, the bass unit can be allocated an output power of 78W, while the tweeter unit is allocated only 22W. Therefore, it can bear 100W pink noise power or ordinary program signal power applied to the sound; When using 100W single frequency signal to test, both treble and bass units may be damaged.
分頻器使用不當(dāng)
Improper use of frequency divider
輸入端分頻點使用不當(dāng)，或揚聲器工作頻率范圍不合理也是導(dǎo)致高音單元損壞的一個原因。在使用分頻器時，應(yīng)嚴(yán)格按JSL爵士龍廠家提供的揚聲器工作頻率范圍來合理的選擇分頻點。高音揚聲器的分頻點如果選擇偏低，承受功率負擔(dān)過重，就很容易燒毀高音單元，中音號筒也是如此。
Improper use of the frequency dividing point at the input end or unreasonable working frequency range of the loudspeaker is also a cause of damage to the tweeter. When using the frequency divider, the frequency division point should be reasonably selected in strict accordance with the working frequency range of the loudspeaker provided by the JSL Jazz dragon manufacturer. If the frequency division point of the tweeter is selected too low and the power burden is too heavy, it is easy to burn the tweeter unit, as is the case with the Alto horn.
均衡器調(diào)試不當(dāng)
Improper equalizer debugging
山東公共廣播音響廠家提醒您其中均衡器的調(diào)整也是關(guān)重要的。頻率均衡器是為了補償室內(nèi)聲場的各種缺陷和揚聲器的各頻率不均勻而設(shè)置的，應(yīng)該用實際頻譜分析儀或用其它的儀器進行調(diào)試。調(diào)試后的傳輸頻率特性應(yīng)在一定范圍內(nèi)是比較平坦的。許多不具備音響知識的調(diào)音員隨意的進行調(diào)試。
Shandong public broadcasting sound manufacturer reminds you that the adjustment of equalizer is also crucial. Frequency equalizer is set up to compensate for various defects of indoor sound field and uneven frequencies of speakers. It should be debugged with an actual spectrum analyzer or other instruments. The transmission frequency characteristics after commissioning should be relatively flat within a certain range. Many tuners who do not have sound knowledge conduct debugging at will.
甚有相當(dāng)多的人，把均衡器的高頻和低頻部分提得過高，形成“V”字形。如果這些頻率與中音頻率相比被提升高于10dB（均衡器的調(diào)節(jié)量一般都在12dB）的話，不僅均衡器造成的相位畸變要對音樂聲嚴(yán)重染色，同時，也很易造成音響高音單元燒毀，這類情況也是燒毀揚聲器的主要原因。當(dāng)然，音響系統(tǒng)的設(shè)計要根據(jù)實際情況，如場地大小、用途、建聲條件等綜合考慮，要根據(jù)實際的使用條件來確定很大連續(xù)聲壓級，進而確定音響的很大SPL值。
There are even quite a few people who raise the high-frequency and low-frequency parts of the equalizer too high, forming a "V" shape. If these frequencies are increased by more than 10dB compared with the midrange frequency (the adjustment amount of the equalizer is generally 12dB), not only will the phase distortion caused by the equalizer seriously stain the music sound, but also it is easy to cause the audio tweeter to burn out, which is also the main reason for burning the loudspeaker. Of course, the design of the sound system should be based on the actual situation, such as the size of the site, the purpose, the sound conditions and so on. The large continuous sound pressure level should be determined according to the actual use conditions, and then the large SPL value of the sound should be determined.
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