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濟南汽車音響改裝http://www.szanyuda.com/介紹常見的功放都是把放大小信號的前置放大器與功率放大器做在一個機殼中，合并功放使用方便，又有比較好的性能價格比。但這種合并功放有它一些固有的缺點，其中最不好克服的就是前級與后級之間的相互干擾問題了。為了解決這一問題，于是便把前級與后級分別做在兩個機殼中，這樣就有了純后級功放。大多的純后級功放都是雙聲道的結構形式，但這種結構形式使得兩個聲道相互干擾問題又不太好解決，為了解決兩個聲道相互間的干擾便又出現了把兩個聲道分開的單聲道純后級功放。
Jinan introduce modified car stereo amplifiers are commonly amplified small signal preamplifier and power amplifier made in an enclosure, integrated amplifier easy to use, there are relatively good cost performance. However, this integrated amplifier has its inherent drawbacks, the worst of which is to overcome the problems of mutual interference between the front stage and rear stage of the. To solve this problem, so he gave were done before and after the class level in two chassis, so there will be a pure power amp. Pure power amp is mostly in the form of dual-channel structure, but this structure allows both channels interfere with each other to solve problems not very good, in order to solve the mutual interference between the two channels in turn appeared to two separate mono channels pure power amp.
　　
濟南汽車音響改裝http://www.szanyuda.com/分析說把功率放大器這樣一塊塊地分割開，最主要的意義是要提高功放的素質，而不是追求這種形式。如果僅僅在形式上實現了相互分開，盡管可以解決相互干擾問題，但其它參數并未明顯改善，那么這種分開對功放提高整體素質來說還是有限的。功率放大器有晶體管與電子管之分，前級同樣也有晶體管和電子管之分。對于音響愛好者與音樂愛好者而言，在選用前級與后級上有多種的組合形式，而不同的組合形式又有不同的音效特點，這使得使用者又多了一些選擇的空間。與純后級功放配接的前級對整個音響系統的優劣影響比較大。首先它必須具有一定的素質，否則，純后級或是單聲道的優點便發揮不出來，甚至有可能把一臺劣質前級的“毛病”突出出來，整體音效反而更差了。再有，不同的前級后級配合其音色特點不同，使用者可以根據個人的偏愛選擇不同的組合形式。
Jinan modified car stereo power amplifier such analysis is that a block of land divided, the main significance is to improve the quality of the amplifier, rather than the pursuit of this form. If only in the form of realized separated from each other, in spite of the mutual interference problems can be solved, but other parameters did not significantly improve, then the separate power amplifier to improve the overall quality is still limited. There transistor amplifier tubes of the points, there are also pre-transistors and tubes of the points. For audiophiles and music lovers, there are a variety of combinations in the selection of pre-and post-stage, and different combinations have different sound characteristics, which allows the user to select the addition of some space. The merits of pre-impact and pure power amp mated to the entire sound system is relatively large. First, it must have certain qualities,otherwise, the advantages of pure mono or after the class will play out, and may even be inferior to a previous stage of the "problems" stand out, but the overall sound even worse. Again, a different level with its former level after a different tone characteristics, the user can choose different combinations according to personal preference.