What is the function of the loudspeaker amplifier?

The function of the loudspeaker amplifier of Pacific Auto Network is to amplify the weak signal input by the sound source equipment, then generate enough current to push the loudspeaker to play sound, and then amplify the weak signal from the sound source or preamplifier to push the loudspeaker to sound.

The function of the power amplifier is to amplify the weak signal from the sound source or preamplifier and push the speaker to make sound. A good set of audio system power amplifier plays an important role.

Power amplifier can be said to be the largest family of all kinds of audio equipment. Its main function is to amplify the weak signal input by audio equipment and generate enough current to push the speaker to play back the sound. Considering the differences in power, impedance, distortion, dynamics, application scope and control and adjustment functions, different power amplifiers have different internal signal processing, circuit design and production technology.

According to different functions, it can be divided into preamplifier (also called pre-stage), power amplifier (also called post-stage) and combined amplifier. Power amplifier, referred to as power amplifier, is an electronic device used to enhance signal power to drive speakers. Power amplifier without auxiliary functions such as signal source selection and volume control is called post-stage.

Preamplifier is the pre-amplification and control part before the power amplifier, which is used to enhance the voltage amplitude of the signal and provide input signal selection, tone adjustment and volume control. Preamplifier is also called pre-stage.

An amplifier that installs a preamplifier and a power amplifier in the same box is called a combined amplifier. The common power amplifiers in our family are generally combined.

According to different purposes, it can be divided into AV power amplifier. Hi-fi power amplifier AV power amplifier is specially designed for home theater. Generally, there are more than four channels, surround sound decoding function and display screen. The main purpose of this power amplifier is to really create the sound effect of the movie environment and let the audience experience the cinema effect.

& ampldquoAV "power amplifier is a runaway dark horse in recent years. With the popularization of large-screen TV and various image carriers, people's demand for "sitting at home and watching movies" is increasing day by day, and multifunctional power amplifiers with various audio and video functions have emerged. "AV" is the initials of English AudioVideo, that is, audio and video. Since its birth, AV power amplifier has gone through the process of Dolby surround, Dolby directional logic, AC-3 and DTS. The difference between AV power amplifier and ordinary power amplifier is that AV power amplifier includes AV selective Dolby directional logic decoder, AC-3, DTS decoder and five-channel power amplifier. And the digital sound field DSP circuit that makes the finishing touch provide different sound field effects for various programs. However, because the AV amplifier has gone through too many complicated processing circuits in the signal circulation of the circuit, the sound purity has been "stained" too much, so the effect is not ideal when it is compatible with HI-FI playback with AV amplifier. This is also the reason why many HI-FI enthusiasts ignore the AV amplifier.

High-fidelity power amplifier is a kind of amplifier specially designed to reproduce the true color of music with high fidelity. The general design has two channels and no display screen.

"HI-FI power amplifier" is the power amplifier of our enthusiasts, and the output power is generally below 2X 150. The design aims at "beautiful timbre and high fidelity". All kinds of high and new technologies are embodied in this power amplifier. Prices also range from 1,000 yuan to several hundred thousand yuan. "High fidelity power amplifier" is divided into "split" separated front-stage power amplifier and "combined" integrated front-stage and back-stage power amplifier.

(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)