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三诺公司生产的合成影院及多媒体有源音箱,逐渐被消费者认可,尤其是多媒体有源音箱倍受欢迎,其音质好,体积小,外型美观。下面将一款三诺公司生产的多媒体有源音箱的内部功放电路推荐给朋友们,其电路简单易制,容易成功。图1为SR—33A功放电路图,图2为电源电路,其中功放输出块采用TDA1519A OTL输出电路。音频信号通过电阻限流,经音量电位器W1调节后,进入音调控制电路。W2为低音调节电位器,W3为高音调节电位器,通过W2、W3的调节,使低音或高音获得不同程度的提升,再经R7、C22、R8、C21耦合,进入到集成电路TDA1519A的⑨、①脚,经功率放大后,分别从⑥、④脚输出。功放块TDA1519A采用单电源供电,散热片应采用不小于280
Three Connaught’s production of synthetic theater and multimedia active speakers, gradually recognized by consumers, especially multimedia active speakers are welcome, its good sound quality, small size, good looks. The following will be a Connaught company’s multimedia active speaker internal amplifier circuit recommended to friends, the circuit is simple and easy system, easy to succeed. Figure 1 for the SR-33A power amplifier circuit, Figure 2 for the power circuit, amplifier output block using TDA1519A OTL output circuit. Audio signal through the current limiting resistor, adjusted by the volume potentiometer W1, into the tone control circuit. W2 for the bass adjustment potentiometer, W3 for the treble adjustment potentiometer, through the adjustment of W2, W3 to bass or treble gain different degrees, and then by R7, C22, R8, C21 coupling into the integrated circuit TDA1519A ⑨, ① feet, after power amplification, respectively, from ⑥, ④ feet output. Power amplifier block TDA1519A using a single power supply, heat sink should be used not less than 280