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對(duì)JBL音響的各個(gè)組件的分析能力大多數(shù)人都未必具備，但對(duì)于音箱和功放，動(dòng)手的機(jī)會(huì)則不少。那么JBL音響配套系統(tǒng)中功放與音箱的設(shè)置相關(guān)內(nèi)容有什么呢？

Most people may not have the ability to analyze various components of JBL sound, but there are many opportunities for speakers and power amplifiers. So what is the content related to the setting of power amplifier and speaker in JBL sound supporting system?

功率匹配：一般來說JBL音響功放的功率要大于音箱的功率。一般情況下，功放的功率比音箱的功率大30%以上。如果用小功率的功放推大功率的喇叭，功放容易過載，會(huì)產(chǎn)生對(duì)喇叭有害的電流，此時(shí)喇叭單元很容易損壞。

Power matching: Generally speaking, the power of JBL audio power amplifier is greater than that of speaker. In general, the power of the power amplifier is more than 30% higher than that of the speaker. If a small power amplifier is used to push a high-power horn, the amplifier is easy to overload and produce a current harmful to the horn. At this time, the horn unit is easy to be damaged.

阻抗匹配：目前音響系統(tǒng)中使用的功放一般都是定阻的。一般功放大多工作在4Ω--8Ω。有些音響工程師喜歡用一個(gè)功放推2個(gè)以上的喇叭。這時(shí)，要注意揚(yáng)聲器。如果阻抗低于2Ω，很容易損壞功放。這種短路工作方式好不要使用。

Impedance matching: at present, the power amplifiers used in professional sound systems are generally constant resistance. Most general power amplifiers work at 4 Ω - 8 Ω. Some sound engineers like to push more than two speakers with one amplifier. At this time, pay attention to the speaker. If the impedance is lower than 2 Ω, it is easy to damage the power amplifier. This short-circuit working mode should not be used.

JBL音響功放后面有時(shí)會(huì)有很多開關(guān)，如：單聲道工作模式、立體聲工作模式、橋接工作模式；還有電平調(diào)節(jié)開關(guān)、信號(hào)頻率切換開關(guān)等，我們?cè)谑褂玫臅r(shí)候一定要注意看這些開關(guān)，把功放調(diào)節(jié)到正確或理想的工作狀態(tài)，否則可能會(huì)造成不可預(yù)知的故障。

There are sometimes many switches behind JBL audio power amplifier, such as mono working mode, stereo working mode and bridge working mode; There are also level adjustment switches and signal frequency switching switches. We must pay attention to these switches when using them and adjust the power amplifier to the correct or ideal working state, otherwise unpredictable faults may be caused.

功放與音箱的線路連接：功放的信號(hào)線盡量使用平衡線。如果系統(tǒng)中有多個(gè)功放，好使用信號(hào)放大分配器，將足夠多的信號(hào)線不衰減地分開，為每條信號(hào)線供電。單獨(dú)使用一個(gè)功放，可以降低系統(tǒng)噪聲，減少隱患，提高信噪比。同時(shí)，還需要注意音箱線的質(zhì)量和連接。嘗試使用更粗更短的揚(yáng)聲器電纜。連接時(shí)一定要分清正負(fù)極，避免短路，尤其是的四芯或四芯以上的喇叭插頭。端子非常小，因此接線時(shí)要小心。

The line connection between the power amplifier and the speaker: the signal line of the power amplifier shall use the balance line as much as possible. If there are multiple power amplifiers in the system, it is better to use the signal amplification distributor to separate enough signal lines without attenuation and supply power to each signal line. Using a power amplifier alone can reduce system noise, reduce hidden dangers and improve signal-to-noise ratio. At the same time, pay attention to the quality and connection of speaker cable. Try using a thicker and shorter speaker cable. When connecting, be sure to distinguish the positive and negative poles to avoid short circuit, especially for professional four core or more horn plugs. The terminal is very small, so be careful when wiring.

從技術(shù)方面考慮，功放與音箱配接有下面幾點(diǎn)要注意：功率匹配、功率儲(chǔ)備量匹配、阻抗匹配、阻尼系數(shù)的匹配等問題。一方面，要考慮聽音室內(nèi)安置幾路音箱系統(tǒng)，簡單的功放僅有1－2路功率輸出，配置簡單的雙聲道立體聲系統(tǒng)即可；比較復(fù)雜的功放要配置4－6路功率輸出。而功放的大輸出功率與音箱的大承受功率必須配好，以防不慎燒毀音箱。

In terms of technology, the following points should be paid attention to in the matching of power amplifier and speaker: power matching, power reserve matching, impedance matching, damping coefficient matching and so on. On the one hand, several speaker systems should be installed in the listening room. A simple power amplifier has only 1-2 power outputs, and a simple dual channel stereo system can be configured; Complex power amplifiers should be configured with 4-6 power outputs. The high output power of the power amplifier and the high bearing power of the speaker must be well matched to prevent the speaker from being accidentally burned.

功放與音箱的功率配置與目標(biāo)響度也有一定的關(guān)系。在一定目標(biāo)響度下，應(yīng)該讓音樂信號(hào)的動(dòng)態(tài)在每件器材上都能得到充分的保證，如果功放功率太大，其增益設(shè)置很小時(shí)，響度已達(dá)到要求，但這時(shí)功放的增益就限制了信號(hào)的動(dòng)態(tài)范圍。所以，功放功率不能太大；否則，既浪費(fèi)開支，又會(huì)帶來響度和音樂動(dòng)態(tài)無法兼顧以及音箱負(fù)荷過重的麻煩。

The power configuration of power amplifier and speaker also has a certain relationship with the target loudness. Under a certain target loudness, the dynamics of the music signal should be fully guaranteed on each equipment. If the power amplifier power is too large and its gain setting is very small, the loudness has met the requirements, but at this time, the gain of the power amplifier limits the dynamic range of the signal. Therefore, the power amplifier power should not be too large; Otherwise, it will not only waste expenses, but also bring the trouble that loudness and music dynamics cannot be balanced, and the speaker is overloaded.

JBL音響配套系統(tǒng)中功放與音箱的設(shè)置相關(guān)內(nèi)容就講解到這里了，如果您對(duì)音響方面設(shè)備有需求就來我們的網(wǎng)站www.zkvd.cn吧，生產(chǎn)制作多年有實(shí)力。

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