A： Echo wall is a simplified home theater system with easy installation. It is the sound above or below the TV. Generally, there are intermediate frequency, high frequency and low frequency. The effect is DSP analog sound effect, which can only be simulated, which is not comparable to the real effect. The bass is partially missing. When a speaker plays a full frequency signal, it will not take into account all signals, and the frequencies of other channels are lost. If it is played by a real DTS or Dolby disc, the echo wall effect will be much worse.
The echo wall is an excellent choice for those who have a small space at home or want to improve the sound quality of TV without installing a complete set of surround sound. Echo walls are thin, about 1m long or longer. They are usually installed on the wall or on the cabinet under the TV. Some echo walls with bases can be placed under the TV.
The home theater is an overall speaker system, including main speaker, center speaker, surround speaker, subwoofer, etc. the most basic speaker system is 5.1 channels, a pair of main speakers, a pair of surround speakers, a center speaker and a subwoofer. In terms of sound effect, its style should be close to that of cinema. Dolby can be decoded and DTS can realize surround sound.
Through digital audio, the echo wall converts various sound effects that need to be sent out through the physical speaker into analog multi-directional positioning. In fact, it's a fake surround. For ordinary users, the effect of the echo wall is OK and can meet the requirements, but for professional users and enthusiasts, only the home theater can achieve the real effect of surrounding the box!

A： 1. It adopts special echo surround technology and five loudspeakers. It also adopts array sound, accurate driving positioning and subjective auditory effect processing, and then deduces the surround effect through integrated single speaker. Simply put, it means that through digital audio, all kinds of sound effects that need to be sent out through physical speakers will make the use effect better.
2. It is a multifunctional integrated playback device, which can adjust videos with poor sound quality. In addition, it also integrates karaoke singing K function, m radio function and Bluetooth sound function to meet the needs of different users.
3. It is mainly aimed at the poor sound quality of board TV. However, although the sound quality lags behind tens of thousands of hifi and home cinemas, it is enough to watch TV, movies and listen to music at home

A：

Conference sound system

Conference sound system is mainly used for conference, training, lecture and other sound reinforcement. Conference sound system is mainly considered to be conference * sound reinforcement system (Note: such as hand-in-hand Conference) or conventional sound reinforcement system, equipped with corresponding conference microphone, etc.

Conference room audio

The common configuration of conference audio is usually mixer, power amplifier and a pair of speakers. Peripherals or audio integrated processors and feedback suppressors can be configured in the configuration. The specific scene system indicators depend on the use level and budget investment.

Public address sound

Public broadcasting sound is generally used in large buildings, such as shopping malls, airports, railway stations, exhibition centers, comprehensive office areas, etc. it is used to play background music, broadcast notices, etc. Public broadcasting audio generally pays attention to language or background music, and the uniformity of sound coverage is considered in the speaker layout.

The public address audio configuration is simple and clear. In addition to the signal source, the program control function and corresponding constant voltage or power amplifier are added. The program is relatively fixed, and the frequency response is between 100 ~ 10kHz.

Sound stage

Stage sound is mainly used for performance and sound reinforcement, which can be divided into indoor stage performance and outdoor stage performance. The stage sound system needs the characteristics of * * system configuration for different types of performances, such as opera, concert, concert, drama, etc.

The stage audio performance configuration requirements are very high, and the system composition is complex and flexible. Such as equalization, voltage limit, frequency division, reverberation, excitation and other peripheral equipment, the frequency response range is required to be wide, usually between 35 ~ 20K Hz, the output power is higher 10000 watts in kW, and there are more than ten to dozens of speakers. The working state of all equipment is required to be in high fidelity mode.