| 摘要 |
A power amplification system includes a power supply input interface, a voice source input interface, a plurality of automatic level control circuits, a voice source selection switch, a volume control circuit, a power amplification circuit, an output interface, a microprocessor, an operation device, and an indication device. Thus, the power amplification system has a smaller volume, thereby facilitating storage, packaging and transportation of the power amplification system. In addition, the user only needs to connect the voice sources to the voice source input interface without having to connect external wires, so that the power amplification system is mounted easily and conveniently, thereby facilitating the user mounting the power amplification system. Further, the power amplification system has an inexpensive price, so that the power amplification system satisfies the economic effect.
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