The audio playback device is divided into four parts:
The electric signal extraction device—the input end recorder, the record player, and the receiver—is a device that extracts a program as an electrical signal from a cassette tape, a record, and a broadcast wave.
Mixer equipment - the front console (including preamplifier, attenuator, hybrid network, etc.) is mainly used for tuning.
Power Amplifier - Enhances the console's output signal to an amplifier that can drive the speaker system to operate.
Sound radiator - a speaker or earphone that converts an electrical signal into an acoustic signal.
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