Brief description of speakers, stereos, amplifiers, amplifiers, speakers

1. Concept understanding

Audio is roughly including a power amplifier, peripheral equipment (including compressor, effector, equalizer, VCD, DVD, etc.), horn speakers mixer, microphone, display equipment, etc. add up to a set. Among them, horn speaker products are sound output devices, speakers, subwoofers, and so on. A speaker includes three loudspeakers, high, low, and medium speakers, three but not necessarily three.
Amplifier is the most basic equipment in a sound system. The power amplifier is commonly known as the "amplifier". Its function is to amplify the weak signal from the sound source or pre-amplifier to promote the sound of the speaker. A good sound system power amplifier is indispensable.
Power amplifier is abbreviated as power amplifier. It can be said to be the largest family of all kinds of audio equipment. Its function is mainly to amplify the weaker signal input from the audio equipment and generate a large enough current to drive the speaker to reproduce the sound.
Microphone, the scientific name is microphone, which is an energy conversion device that converts sound signals into electrical signals, also called microphones, microphones, and microphones.
There are two types of loudspeakers: wireless loudspeakers and wired loudspeakers. 

2. the difference
Sound includes a set of equipment such as power amplifier, speakers etc.
The speaker is a speaker, which is connected to the power amplifier and outputs sound.
If there is an amplifier without speakers, there will be no sound; if there are speakers without an amplifier, the speakers will not produce sound.
The original audio is very small. It is necessary to use a power amplifier (amplifier) to amplify the small audio by N.. times. Generally speaking, speakers have relatively high power, and the audio source of a disc is very small. If the speakers are directly connected, the small sound is almost inaudible, so a power amplifier is used to amplify the audio signal.