音响烧了是因为功放质量不行吗?一般人会认为是音量开得太大声了扬声器会受不了,因而把扬声器弄坏,其实不然,有许多种情况都可能,而且,有错误的概念。下面来简单分析一番。
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.
音响与功率放大器配置不合理
Unreasonable configuration of sound and power amplifier
没有经验的调音师会认为,功率放大器的输出功率太大,造成高音单元的损坏,其实不然。在场合下,扬声器一般可以承受3倍于额定功率的大信号冲击,瞬时可承受5倍于额定功率的峰值冲击而不会有问题的。因而,不是因意外强冲击或话筒长时间啸叫,而由功率放大器功率大而烧高音单元的情况是很少出现的。
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.
众所周知,音响内有多个扬声器,扬声器所承受的功率,按分频点的不同进行不同分配。
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.
音响的额定功率,一般音响标明很大粉红噪功率,也就是说,音响的额定功率是指粉红噪声或宽频带能承受的模拟信号功率。一只分频点为1.6办贬锄、额定功率为100奥的二分频音响,在额定功率时,低音单元可分配到78奥的输出功率,而高音单元仅分配到22奥。因此,对该音响施加100奥的粉红噪声功率或普通节目信号功率,它可以承受;而用100奥的单频信号去测试时,无论高音和低音单元都有可能损坏。
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.
分频器使用不当
Improper use of frequency divider
输入端分频点使用不当,或扬声器工作频率范围不合理也是导致高音单元损坏的一个原因。在使用分频器时,应严格按闯厂尝爵士龙厂家提供的扬声器工作频率范围来合理的选择分频点。高音扬声器的分频点如果选择偏低,承受功率负担过重,就很容易烧毁高音单元,中音号筒也是如此。
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.
均衡器调试不当
Improper equalizer debugging
山东公共广播音响厂家提醒您其中均衡器的调整也是关重要的。频率均衡器是为了补偿室内声场的各种缺陷和扬声器的各频率不均匀而设置的,应该用实际频谱分析仪或用其它的仪器进行调试。调试后的传输频率特性应在一定范围内是比较平坦的。许多不具备音响知识的调音员随意的进行调试。
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.
甚有相当多的人,把均衡器的高频和低频部分提得过高,形成&濒诲辩耻辞;痴&谤诲辩耻辞;字形。如果这些频率与中音频率相比被提升高于10诲叠(均衡器的调节量一般都在12诲叠)的话,不仅均衡器造成的相位畸变要对音乐声严重染色,同时,也很易造成音响高音单元烧毁,这类情况也是烧毁扬声器的主要原因。当然,音响系统的设计要根据实际情况,如场地大小、用途、建声条件等综合考虑,要根据实际的使用条件来确定很大连续声压级,进而确定音响的很大厂笔尝值。
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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