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amplifier audio is also called power amplifier, which is commonly known as the amplifier in our daily life. It is the most basic equipment in the sound system. So, what should consumers pay attention to when they want to buy amplifier audio? Power amplifier equipment Power amplifier is the largest family of all kinds of audio equipment. Its main function is to amplify the weak signals input by audio equipment and generate enough current to push the speaker to play back the sound. Due to the consideration of power impedance distortion dynamics, different application ranges and control and adjustment functions, different power amplifiers have different internal signal processing, circuit design and production technology.