The height of the bracket can be selected according to the space of the room, but one thing is that the main speakers of the left and right channels must be placed on the outermost sides of the left and right, and the height should be at least 30 cm higher than that of the left and right surround speakers. The distance between the left and right surround speakers and the main speaker can be arranged according to your room, but the gap between the left and right speakers and the surround speakers should not be less than 30 cm. The center speaker is a woofer and must be placed in the middle. There is generally no need for a speaker shelf. If necessary, you can put it on the last side, but you must put it in the middle. Otherwise, the sound field will get worse and there will be no music in the middle. The height can be parallel to or lower than the surround speaker. The power of the surround speaker is less than that of the main speaker, so the distance between the main speaker and the surround speaker can be adjusted freely according to the listening depth, but it can't be parallel, otherwise the sense of space of music can't be recognized, or the sense of space of music is not obvious. A good sound system can make the music have a sense of field, let you find the feeling while playing music, and finally determine the position of the sound. Of course, the sound source is the most critical, the audio resolution of genuine DVD and EVD is better, and CD player is the best choice. ...