Line array sound is a speaker system, and its technology and manufacturing have been developing steadily for many years. Recently, the situation has changed, and linear array speaker systems have appeared at many major sports events and large performances in the world.Linear array is a group of radiating elements arranged in a straight line and closely spaced, and has the same amplitude and phase. Through linear transmission, the transmission distance is increased and the attenuation during sound transmission is reduced.The advantages of linear array sound reinforcement systems are obvious.
(1) Due to the characteristics of the linear array, the directivity in the vertical plane of the main axis is a narrow beam, and the energy superposition can be radiated at a long distance. The lower end of the curved part of the linear column covers the near area, forming a coverage from near to far.(2) The improvement of the linear array amplifier is more in line with the requirements of technology, process and installation. The middle high-frequency part is more special, 2 (JBL) or 3 (V) tweeter outlets are connected together fJ2j, JBL company called it a sound wave generator, E-V company called it a plane wave generator. According to the analysis with MAPP software, the directivity of the linear array becomes more and more uniform with the increase of frequency. When a certain frequency is reached, such as 1000Hz, the directivity is radial, that is, the flap appears in the directivity map. At this time, the acoustic waveformer composed of the tweeter comes into play, so that the high-frequency directivity is superimposed. (3) Linear arrays cannot ignore mutual interference, and linear arrays themselves do not improve sound quality.
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[Installation process]
Download the sofa butler APK APK Copy U disk → 2 Download and install the small Y game → 3U disk into the TV to enter the small Y game installation and management page → 4 find the sofa butler APK download
ã€Steps】
1. Baidu search for "sofa manager" into the sofa network, download the sofa butler package; or directly click the link (http://app.shafa.com/shafa.apk) to download the sofa butler package. 
3, the U disk into the TV's USB interface, enter the small Y game, enter the installation management page 
4. After entering the installation package management, the system will detect all APK files in the U disk, find the installation package for the sofa housekeeper, and click directly to install. After the installation is completed, it is only necessary to download any TV version application through the sofa butler in Haier LS42A51, which is very convenient. 
If the installation fails, restart the device and try again by following the steps. Still have questions please add the following sofa butler official QQ group.
Haier LS42A51 how to install third-party applications through U disk
Haier LS42A51 how to install the sofa butler by U disk, Haier LS42A51 other models can also refer to this tutorial. 2, open Haier LS42A51 application store search, search find small Y game, download and install small Y game
Copy the downloaded apk installation package to the U disk.
If you still can not read the U disk, it is recommended to format the U disk to FAT32 format (if there are other contents in the U disk, export and then format), or try another U disk.
Watch video on demand with smart TV, recommend to watch live TV, HDP broadcast recommended; more interesting content, please use Tencent video TV version, TV; Fun smart TV and box, more exciting content in the sofa network