Under the premise of a good indoor acoustic environment, the more accurate the sound image positioning, the more realistic and natural the sound color, and the more vivid the presence effect of sound image integration can be displayed. First, let's take a look at the placement of speakers in the cinema. The following figure shows the layout of each channel speaker in an actual theater with surround sound. The distance between the speakers in front of the left and right channels is almost as wide as the movie screen, and the front speakers are generally arranged behind the movie screen. They can transmit sound to the audience through small gaps at the end of the screen. Therefore, this speaker can be placed at half the height of the screen. The subwoofer may not be placed symmetrically in front of the speaker group; Standard cinemas have many surround speakers that, together with the front speakers, truly "surround" the audience.

1. Sound source: refers to the source of sound. Common sound sources in home audio systems include cassette recorders, CD players, LD players, VCD players, and DVD players.

2. Amplification equipment: In order to effectively produce high-power speaker sound, the signal output from the sound source generally needs to be amplified. The common amplification equipment now is AV amplifier, which is generally transistor amplifier. Some enthusiasts also love electronic tube amplifiers.

3. Sound returning equipment: i.e. speaker, its performance will directly affect the listening effect.

4. Connection line: including the connection line from the audio source to the amplifier and the connection line from the amplifier to the speaker