How to adjust the home theater subwoofer?

                                     How to adjust the home theater subwoofer?

First of all, let's understand why the theater system must have a subwoofer. There are three main reasons:

1. In the audio system, replaying the low-frequency part consumes the most power, especially the low-frequency part below 100HZ. Separating this part of the low frequency and let the subwoofer be responsible for it alone can minimize the burden on the power amplifier and other speakers, and can achieve smaller sound distortion and better low frequency sound. pressure and dynamics.

2. The low-frequency sound part is most likely to be affected by the standing wave (for example: there is a booming sound, the texture and details of the low-frequency are affected), and when the low-frequency of the theater system is provided by the subwoofer, the subwoofer can be placed In the listening room where the standing wave is the smallest, or through the low frequency manager, theater power amplifier with eq adjustment to do standing wave sound processing.

3. Regardless of the sound format of Dolby or DTS, their audio tracks have prepared a separate channel for the subwoofer, named LFE. The corresponding playback speaker is the subwoofer. If the theater system does not have a subwoofer when watching movies, there will be a lot less sound.

In the home theater audio system, sound generation, positioning, and detailed performance are completed by the front, center, and surround speakers. The subwoofer serves these speakers and belongs to the auxiliary speaker. The task is to supplement the overall sound field. Low-frequency bandwidth and enhanced low-frequency energy.

Therefore, when adjusting the subwoofer, you should not just focus on the subwoofer, but consider the overall sound field performance. Listen while tuning, tune while listening, tune the subwoofer, and listen to the overall effect.

Subwoofer adjustment is mainly about frequency interception, volume and phase. It must be adjusted in combination with the configuration of power amplifiers and speakers as well as the room environment to achieve the best performance.

Frequency adjustment can be understood as the crossover point setting of the whole set of audio, that is, how to better connect the main speaker and subwoofer.

The general rule of frequency adjustment is: when the frequency is increased, the intermediate frequency is rich, but the sound is not clean; A little, the main speaker is small, and the frequency is turned up. There is no absolute correctness, only relative reasonableness, and it is enough to grasp the scale. The volume adjustment of the subwoofer should also be carried out according to the overall sound field performance.

Note: When adjusting the subwoofer, be sure to listen from the position of the audience, especially when adjusting the phase.

Looking for familiar movie clips, especially clips with rich low frequency, strong explosive power, and concentrated energy for debugging, recommend a few more representative movies.

1. Test vocal dialogue: "Let the Bullets Fly", "Warcraft", "Transformers" full film.

The vocal dialogue is the most important part of the home theater audio system, which is mainly restored through the center channel, and the information volume of the center channel can even account for 80% of all channels.

2. Test the continuity of surround sound: "Dolby Atmos Demo Disc" clips of wind, rain and lightning

1. Test surround sound positioning: "The Book of Eli" street battle clip

If your home theater settings are correct and the surround sound speakers are installed in the correct position, you can clearly hear the feeling of bullets whizzing past your ears through this movie, as well as clear bullet flight paths and impact points.

The above are just a few representative examples, and there are many movies with better sound effects.