用5G37功率集成电路组装音箱,调试容易,成本低廉。整机的电原理见图1,有关5G37集成块的电路原理及其典型使用已有不少介绍,不再赘述。本文介绍的电路,具有较高的输入阻抗,特别适宜做唱机放大器。印刷电路如图2所示。所有元件均采用业余品,故成本很低。本机调整很简单,在输出端先接24Ω1W的电阻 With 5G37 power integrated circuit assembly speaker, easy debugging, low cost. The machine’s electrical principle shown in Figure 1, 5G37 integrated circuit block diagram of the circuit and its typical use has been a lot of introduction, not repeat them. This article describes the circuit, with high input impedance, especially suitable for phono amplifier. Printed circuit shown in Figure 2. All components are used amateur products, so the cost is very low. The machine adjustment is very simple, the first output of 24Ω1W resistance