As you know, the subwoofer is used to enhance the bass, but I don't know how to enhance the bass and how to enhance the bass.
In fact, the configuration of the subwoofer is exquisite.
First, look at the occasion. The application is different, and the configuration requirements are different. For example, as a theater, it is required to configure a subwoofer, but it depends on what type of theater. Because the requirements of the opera house, the theater, the theater, or the concert hall are different. But the author thinks like an opera house, a concert hall, etc. In principle, such theaters should be equipped with 2-4 subwoofers. But as an entertainment venue like performing arts, slow rocking or Di Bar. In principle, more subwoofers should be configured for such locations. Generally 6-8, more than a dozen. For example, in the multi-function hall inside the unit, it is necessary to consider the conference-based or activity-oriented ones, which should be treated differently. If you are based on a conference, you don't have to configure it. If you are active, you should configure 2 subwoofers. (The above refers to the general situation)
Second, what type of (or specification) subwoofer is equipped. Because the subwoofer has 12", 15", there are 18" or 24" and other specifications. Then how to choose? It depends on whether our entire application emphasizes the strength of the bass or the depth of the bass dive. For example, in Di Bar, we should emphasize the strength of the bass. If it is a theater, we should emphasize the depth of the bass dive, and we should pay attention to the needs of the low frequency band and the sound pressure level in the entire audio range. For example, our full-range speaker is a 12" woofer. For general subwoofers, you should choose a 15" woofer. For example, the full-range speaker is an 18" woofer. For general subwoofers, you should choose a 18" or 24" woofer. Can't be a full-range box that is 12" subwoofer selected 18".
Again, how to place the subwoofer is often overlooked. In fact, this is very important.
It is generally believed that the propagation of low-frequency sound waves has no direction, so the subwoofer can be placed at will. But in more cases, for the sake of beauty, the two subwoofers are placed on either side, or the subwoofer box is simply hoisted. In fact, this is not the best way to put it.
Due to the long wavelength of low-frequency sound waves, low-frequency sound waves are easy to produce diffraction, especially in the front and rear of a box or in multiple boxes at different positions and different phases. In severe cases, a so-called "sound short circuit" occurs. Therefore, we cannot place it at will. For example, in the cinema speakers, it is necessary to equip all the sounds with the sound baffle after being placed as required. This greatly reduces the diffraction and interference caused by the sound waves, which will greatly improve the sound quality. For example, there are many Di Bars that stack all the subwoofers reasonably, which is an effective means to increase the low-frequency sound pressure level. In general, the two subwoofer boxes are discharged together to increase the sound pressure of 3db, and so on. If the subwoofer is placed on the ground, it will increase the sound pressure of 3db compared with hanging and shelf. Of course, you must pay attention to the polarity when wiring. What is the concept of 3db here? 3db is doubled. So it is very impressive.
Therefore, in the specific practice, we can stack the ultra-low speakers that are placed separately on both sides, and put them in the middle or on the side, so that it does not affect the sound image localization and enhance the low-frequency sound pressure (same reason to reduce the configuration). It can be placed in a place such as a slow shake or a di bar.
The last point is that the position of the subwoofer must be solid and can not be overhead, otherwise it will easily generate resonance and affect the sound quality.
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