Editor's note: When you don't have a subwoofer, you want a subwoofer. After you have a subwoofer, you know how easy it is to get a high quality low frequency! Before we shared a question and answer about how to use the home theater subwoofer, see: "The gunners come over to talk about the subwoofer", today talk about how the subwoofer is placed and debugged. Basic points for adjusting the subwoofer The adjustment of the subwoofer is really not an easy task. Here, we can only explain a few key points in detail, hoping to make it easier for AV fresh people to get started. First, the subwoofer should not be placed on the back wall of the speaker (that is, the wall of the screen or the TV), and try not to put the subwoofer in the corner. When using the subwoofer, it is better to have enough room for its energy to expand. In this way, the low frequency can be naturally distributed evenly in the space, and it will not be crowded in one place, making it easy to catch it. The horn back wall is the most placed position of the equipment in the general environment, how much will affect the energy reflection of the subwoofer; as for the corner? That is the position where the three walls are the most easy to accumulate energy. The subwoofer is placed here and wants to be A clear low frequency is probably a very difficult thing. So, it might be better to put it there? In the experience, it is placed obliquely on the half or one-third of the side wall. It is usually good to use the wall to make uniform diffusion. Of course, each space has different characteristics, and you still have to try more. Second, usually the volume and crossover point of the novice is too high. Generally, people who are connected to the subwoofer for the first time often suffer from the sudden discovery of the New World. Therefore, the weight of the low frequency is adjusted too much, and the crossover point of the subwoofer is set too high. It is the low-frequency booming and powerful, but it is completely incomprehensible, and the pressure is too heavy. It will feel uncomfortable after listening for a long time. A good subwoofer sounds like it's enough, fast, light and not bloated. If you find that the shock is enough after adding a subwoofer, the low frequency is not as clear as before, it always sounds weird. And always involuntarily pay special attention to the existence of the bass; then, please check carefully, the volume and crossover point of the subwoofer is too "HIGH"! Third, multi-party attempts are still the only way to adjust. Due to the long wavelength of the ultra-low frequency, the relationship with the space will be more closely. Sometimes even the subwoofer will change its sound at the same angle. The position and crossover point of the adjustment will be adjusted from different angles. The settings, phase changes, etc. are all places to try. For example, if a subwoofer always feels that it is not enough, what should you do? Maybe just put it directly in front of the toes or behind the seat, you can solve more than half of the problems, these need to be bold to assume, Actually try to see the effect before you know. In short, in the AV environment, the subwoofer is a very important item. Without it, the audio-visual effect will be much less and the fun will be reduced a lot. Although the adjustment of the subwoofer is not very simple, as long as you are willing to do it, the freshman will get a lot of valuable practical experience. To get into the new world of AV, start with the subwoofer! The perfect subwoofer layout in the audio-visual room (Lin and people compile) Editor's note: This article is an excerpt from the M&K company published in 1998. The article on the use and placement skills of subwoofers is expected to be provided to readers who have a headache for the subwoofer. reference. This article has been authorized by the M&K original translation. The factors affecting the low frequency and the extremely low frequency are mainly from the listening room itself and the position of the subwoofer in the space, and the low frequency sense of the subwoofer reproduction depends mainly on the shape of the room and the construction of the listening environment. Therefore, in different listening spaces, the reproduction of low frequency is also different, but the most important factor affecting the sound quality and volume is from the relative position of the subwoofer in space. There is a simple subwoofer placement rule, that is, when the subwoofer is closer to any wall or corner in the room, the amount of low frequency you can get is stronger; if you move the subwoofer away from these, then The bass energy you feel will also be reduced. But don't forget, the floor is also a major factor in reflecting the low frequency. To get the most sense of ultra low frequency, you have to place the subwoofer directly on the floor of the corner. According to our past thousands of rooms, we tested the performance of countless subwoofers. Most of the cases have confirmed the best subwoofer position, not directly adjacent to the corner, or very close. All the tests we have done are the "Adaptive Window" technology using the "MLSSA" system, which is the only room testing technology that can be correlated with the time/frequency characteristics of the human ear system and sound. Do you feel at a loss in the face of this large and small multi-channel speaker? Putting the subwoofer in the corner or near the corner is not only a good position, but also an excellent starting point for experimental testing. Usually, in such a positioning manner, the sense of low frequency in the space can be maximized, but in a few spaces, the quality of the bass replay is deteriorated, and the subwoofer is thus far away from the corner. If you want to find a subwoofer in the listening room to find the smoothest frequency response, no peaks or dents, or no resonance, the most typical example is to place it in the closest listening position. On the corner. For example, if your sofa is in the back half of the room, then the most desirable ideal for subwoofers should be in the corners at the back. In fact, the frequency curve measured by each listening space is not perfect, and more or less will cause peaks or dents due to the structure of the room. Therefore, you will hear a boom when the music is playing, and the sound will be blurred - not only the low frequency, but also the entire range will be affected. Therefore, our ultimate goal is to make the overall sound smooth and achieve high-quality ultra-low frequency performance. In the multi-channel system, the tuning is good, and it is like the Bass guitar in the rock band, which has an unshakable importance. How to find the best position of the subwoofer? Here, we offer two effective ways to make your subwoofer find the perfect destination. The premise of the first way: we don't let the heavy subwoofer find a home around the room. First place the subwoofer in the position you listen to the most (Editing: the yellow emperor we often say), then connect it to your favorite system and let the whole system play the proper music. What you need to do next is to walk around the listening room, try to stay at every point in the space, and listen to the low-frequency performance of each position. When you find that the entire system can satisfy you in all aspects, that is, your ears hear a smooth frequency response, a pleasant and impactful low-frequency performance, or the next best There is no bang in the position that makes you uncomfortable, so "probably" here is the best place for your subwoofer to be in the listening room. Ok, now move your subwoofer to that point and walk back to your original listening position. If the sound performance at the Yellow Emperor is at this level, you can achieve the level you want, then the subwoofer. The best location should be finalized. If not, you have to repeat the above steps to return the subwoofer to the Yellow Emperor and continue to find the best placement. The other way is more complicated, you must use the low frequency of the sound pressure meter and test (below 100Hz) (you can find it in the test software on the market). Try to move the subwoofer to every corner of the house, listen to the performance of the gradually decreasing low frequency band everywhere, and measure it with a sound pressure gauge, and plot the obtained values ​​on the paper; find the overall frequency The most slick of the graph is the placement (the best position for the subwoofer). For more home theater technical information, please pay attention to the official WeChat: cnhifi of China Home Theater Network (). Peel Mask PCB
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