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Which kind of sound quality is good and how to choose sound speakers?

SpaceXtt

Member
To buy a good sound system, there are many factors to consider, such as the listening environment (computer desktop, living room), whether the function is to be a home theater or pure music, if music, what type of music (classical, modern, Piano, symphony, pop, rock, etc.), budget range, speaker appearance style requirements, what kind of signal source, etc. It is really not easy to pick a set of satisfactory speakers. If you only consider sound quality, how to choose speakers with good sound quality?

Which kind of sound quality is good and how to choose sound speakers?

First of all, the sound quality is not the best, only better, and there is a good sound quality speaker that suits you. Generally speaking, "high fidelity" is generally accepted as good sound quality. Here comes the point. When choosing high-fidelity speakers, the most basic point is to choose large-caliber woofer speakers as much as possible. Because there are three principles for authentic sound reproduction (high fidelity):

1. Speakers have a wide and flat frequency range. It is not only the axial frequency range in the traditional sense, but also the frequency response range where the sound power is uniform within a certain radiation angle, that is, the directivity of the speaker system is better.

2. Dynamic range (the range of the sound from the slightest to the loudest). All modern speakers are compressed to restore the dynamic range, which is not a completely true reproduction. It is an important indicator to measure high-fidelity speakers to restore as large a dynamic range as possible.

3. The sound quality is natural and real. The lower the distortion, the better, especially under loud sound pressure and high power.

Which kind of sound quality is good and how to choose sound speakers?

These three aspects are directly related to the sound performance, and a correctly designed speaker system, no matter how large or small, has no big gap between the mid and high frequency bands. The gap is mainly in the low frequency, and the low frequency extension is not easy to do well. A good low frequency is directly proportional to the volume of air that the speaker system can exchange per second, that is, the volume velocity, that is, driving more air per unit time can achieve better low frequencies. This is the principle of physical acoustics. The large-diameter loudspeaker woofer has a large effective vibration radiation area. It can easily drive a large volume of air and is easy to reproduce low frequencies. Therefore, the most reliable way to obtain bass is to choose a large-diameter woofer system as much as possible. (You can also use several small-diameter woofers to work in series and parallel to obtain the same vibration area as a large-diameter speaker. For example, the vibration area of two 8-inch bass is equivalent to an 11.3-inch bass.)

Of course, a large-diameter speaker system does not mean that its sound must be good. The low-frequency of a large-diameter speaker system is difficult to design well. If the design is not good, the bass will be bad, poor control, and muddy. Therefore, the correct design of the large-diameter speaker system lays a solid foundation for the sound of the system on an objective basis. Generally, large-diameter bass speakers with good sound quality are expensive, which is what experts often say "bass is expensive."

Which kind of sound quality is good and how to choose sound speakers?

But what is certain is a small-caliber speaker's bass is definitely not good, because small-caliber speakers cannot exchange a large amount of air in a short time. If you want to exchange a reasonable amount of air as large as possible, you need a relatively long stroke. Most long-stroke small-diameter speakers tend to have various distortions. Many small speakers essentially filter out the bass to make the sense of hearing cleaner. The mid-range sound quality of the human voice may be better, but it is impossible to have a huge bass, especially the extension and dynamics of the low frequency.

In addition to a large-diameter woofer, good low-frequency reproduction also requires a large cabinet. Why? For example, a rigid closed box. The air inside is equivalent to an air cushion. It has a reaction force. You can't blow in or suck in/out. The smaller the box, the more difficult it is. The air volume is exchanged, and a larger box is required to cooperate with it. Therefore, the cabinet volume of professional music monitor speakers is between 50 liters and 150 liters, and the caliber of a single woofer is more than ten inches.

Which kind of sound quality is good and how to choose sound speakers?

A speaker, if the speaker is not big, and the cabinet is not big, don't expect to produce particularly good bass. It may be better than the bass speaker of the same caliber, but compared with the larger bass speaker, it is not a level. Without good bass and low frequency, the probability of good sound quality of the whole speaker is very small.

Of course, good sound quality also has a certain relationship with the material quality of the speaker and the number of frequency divisions of the speaker system. The standard of quality varies. Can be specifically discussed later. One thing is certain: a properly designed multi-way speaker system tends to sound better.

Which kind of sound quality is good and how to choose sound speakers?

To add, small-diameter speakers are not bad. There are many types of small-diameter speakers. Some are particularly suitable for playing language, some are suitable for playing near-field music, and some are suitable for playing specific content. Depending on the type and use, it can also be a good speaker. For example, the British LS3/5A small monitor speakers, the BBC designated monitor speakers, are a representative of British sound, and they are very good in language monitoring. Its five-inch woofer has a measured frequency response of 70Hz-20Hz+_4dB, the resonant frequency of the cabinet is 40Hz, and the Q value is 1.2. This is designed for compactness and convenience, at the expense of low frequency and efficiency. It has little bass volume and low sensitivity, but it is a very good language monitor speaker, especially suitable for broadcast near-field monitoring.
 
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