The power amplifier is referred to as a power amplifier, and is an electronic device for enhancing the signal power to drive the sound of the speaker. A power amplifier without an accessory function such as source selection and volume control is called a post stage.
The preamplifier and control section of the preamplifier amplifier is used to enhance the voltage amplitude of the signal, providing input signal selection, tone adjustment and volume control. The preamplifier is also called the preamplifier.
The combined amplifier concentrates the preamplifier and power amplifier components in one chassis.
AV amplifiers are designed for home theater use, generally with more than 4 channels and surround sound decoding.
* Directional Logic Surround Amplifier: AV amplifier with Dolby Promise logic decoding.
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