The placement of these two speakers has a certain relationship with the position of the mid -channel speaker. In order to ensure the stability of the left and right movements, they should be placed on both sides of the middle -set channel speakers, and these three speakers should be equal to the position of the best listeners in front of the screen. Generally speaking, the position of the middle speakers should be one distance than the left and right speakers. Until the two sound fields can be completely combined to create a truly unified acoustic positioning. The distance between the backward is related to the size of the space, the listening location and the speakers used, and can be determined by testing. In addition, the vertical height of the left and right channel speakers is not higher than or lower than the middle speaker 0.3m (it is better to be slightly lower), otherwise the height of the left, middle, and right speakers is high If the difference is too large, the sound of the sound in front will feel the feeling of jumping acoustic when moving horizontally. Generally, floor -to -ceiling speakers can meet the above requirements. If the bookshelf -style speakers are used as left and right speakers, they should be fixed on the speaker bracket, so that the distance between the left and right channel speakers from the above requirements is related to the size of the screen. If a large and medium -sized screen is used in small rooms, the left and right -channel speakers are close to both sides of the screen. If the screen is small, it can make them a little farther away from the screen to get a wide three -dimensional sound field. But don't be too far away from the screen, so as not to give people a false feeling because the sound location is too far away. From this point, there is a "innate" deficiency -the environment is too small. In summary, the sound direction of the speakers of the three -channel speaker of the left, middle, and right is more than diffusion. That is, the radiation angle range of these three channels should be based on the position of the best listening. This can reduce the impact of reflex sounds from the floor, walls and roofs, and properly ensure sound positioning.