I am Jiang Xiaodong. The chief designer of Shengfeng Group Audio. The last article caused a great sensation among enthusiasts. While the enthusiasts felt that it was reasonable, they also felt how to make their subwoofer return to normal! So in this article we will talk about some things you need to know about subwoofer adjustment.
Last time we talked about the phase adjustment problem of the subwoofer, today I will finish the question about how to control the crossover frequency and the volume of the subwoofer.
Crossover point
The setting of the crossover point is the easiest to see if the dealer's professional ability and the subwoofer you bought are as good as the ads describe. First introduce a term: SLOPE (slope).
The red part of the figure is the slope
What do you know about the role of this? That's because all the crossover lines don't say that you are at that frequency, and that frequency below or above actually has energy. In other words, you actually still hear it. Then there were two problems at this time:
1. If my main channel is set to sound above 100HZ, then my subwoofer should be set at a few HZ?
2, everyone said that the subwoofer has no directionality, why do I always hear the subwoofer?
The first question is to first know that there is a problem to be avoided in the design of the divider. If your main channel is set to sound above 100HZ, and your subwoofer is also set to sound below 100HZ (or above 100), then the sound you hear should be as shown in the figure below.
Figure A
The red line is the sound you hear. You will hear a lot of 100HZ sounds, so your bass should be much more and more chaotic. I have also encountered fans who mistakenly believe that this sound is a standing wave. Then how should you set it up?
Figure B
In theory, if your main channel is set to sound above 100HZ, your subwoofer should be set below 100HZ. I can't tell you exactly how much below, because that is with your subwoofer design and Your theater amplifier is related. At this time, how can you say that the professional ability of the dealer is related to the quality of the subwoofer you bought? When you see this, please take a look at the location behind your subwoofer.
If your main channel is set at 100HZ and your subwoofer is also above 100HZ or 100HZ, you will hear the problem in Figure A. Then your dealer is not professional enough, or the subwoofer you bought is not accurate, can the inaccurate subwoofer be expensive subwoofer? So this position should be below 100HZ.
The second question is: Everyone says that the subwoofer has no directionality. Why do I always hear the subwoofer? That's because you look at the curve in the picture, no matter what your subwoofer slope is (assuming 100HZ crossover), 200HZ, 400HZ or higher, in fact your subwoofer also sounds, the wavelength of 100HZ is longer ( 3.4 meters), so it is not easy to hear the position, but 200HZ (wavelength 1.7 meters), 400HZ (0.85 meters)? Do you still feel that you can't hear the position? Therefore, in fact, the adjustment of the subwoofer is to be a very professional person to really call out and listen to the energy and correct sound.
2. Subwoofer volume
The volume of the subwoofer has to be adjusted. Of course, some people think that I like the bass, so the more the better. I don't have any opinion on this, but if you want to hear a clear and clean bass, then you must know how to adjust the volume of the subwoofer.
For example, if you have seen or heard my "three-axis listening method" lecture, you should know that the guitar is playing, the bass is on, and the treble is down. This is an inherent feature of the instrument and will not change. But when the volume of the subwoofer is too loud, the bass of the guitar will run below the treble, which is against the way the guitar itself is played. You can also try it with your own sound system, but only if the sound structure of the main channel of the tested sound system is correct.
Regarding the adjustment problem of the subwoofer, here are some fans who asked me: My problem is not the connection between the main channel and the subwoofer. My question is how to make my sound system play its full potential. My sound system can hear the emotions in the music. How to make the audio of the enthusiasts play its limits is very difficult, because each person's sound system is different, and the problems are different. Although there is no way to tell you how to solve your own problems, there is a complete way to make your sound work better. Three-axis tuning method. Just follow the logic mentioned inside, and then listen to the three-axis listening method, you can quickly find the problem of your own sound system, and solve this problem. Regarding the content of the three-axis tuning method, I will write it out as soon as time permits, please look forward to it.
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