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Correct purchase of four elements of sound
First: Determine the use
The speaker of the market a wide range of functions, will be different. So before you buy, you must first determine the use of speakers, and then select the appropriate function of the speaker according to the actual situation. In addition to determine the choice of speakers budget. Because the sound is in the whole sound system in an important position, so the proportion of its investment is the largest. But in other equipment collocation should also pay attention to the reasonable collocation, can not appear the phenomenon of top-heavy.
Two: Imbre
In addition to function as the leading purchase points, speaker sound options is crucial. Every music lover's taste and preferences are not the same, and the speakers sound characteristics of production of different countries and different brands will also be different; the famous "the world's first burn audio fancier Mr. Li Jihui also said:" each speaker has a different personality and performance. The sound of the bold and mighty, the British sound warm and heavy in Germany and the Nordic pronunciation is clear with Italy sound romantic and luxurious, with the effect of the myriads of changes is very difficult, there are absolute standards, only the relative preferences. Each set of audio work, it represents every interpretation of music masters."
Three: Performance index
Sound box is a kind of transducer that converts electronic signal into sound, so it is very important to consider the reasonable performance index for the sake of safety and service life. Speakers usually have technical specifications:
1. Power
The power determines the maximum sound intensity that the loudspeaker box can send out, the feeling is the sound that the loudspeaker box sends out can have how big shock force. The power of the loudspeaker box is mainly determined by the power of the power amplifier chip and the power of the power transformer. For the ordinary family users about 20 square meters of room, the real sense of 60W power is enough, but the power amplifier reserve power is better, the best for the actual output power of more than 2 times.
2. Frequency range and frequency response
Theoretically, the 20 ~ 20000Hz frequency response is enough. Below the voice of 20Hz, although not to hear but other people can perceive the sense organs, which can feel the so-called bass strength, so in order to perfect to play all kinds of instruments and the language signal, to achieve high fidelity speakers, can be the harmonic tones were released to heavy.
3. Distortion
Harmonic distortion, distortion and distortion of transient intermodulation distortion. It is more important in the speaker and loudspeaker system, which directly affects the reduction of timbre and timbre. This is often expressed as a percentage, and the smaller the ＆#118alue is, the smaller the distortion is. The distortion of the ordinary multimedia speaker is less than 0.5%, and the distortion of the subwoofer is generally large, and it can be accepted by less than 5%.
4. The sensitivity of the speaker (unit dB)
The sensitivity of each speaker 3dB, the output pressure is doubled. Generally, the sensitivity is 87dB, the sensitivity is below 84dB, and the sensitivity is higher than 90dB. Sensitivity increases with the increase of distortion cost, so as a high fidelity speaker, in order to ensure the restore degree and reproduction ability of timbre, it is necessary to reduce some requirements for sensitivity.
5. Signal to noise ratio
Signal to noise ratio is the ratio of the normal sound signal of the sound box playback to the noise signal without signal. The higher the signal to noise ratio, the smaller the noise.
Four, box material
The main function of the loudspeaker box is to suppress diffraction, eliminate the acoustic short circuit effect, expand the frequency response and sensitivity, and suppress the excess resonance, thereby improving the nonlinear distortion and transient performance.
The box body materials are: wood, plastic, stone, glass, ceramics etc..
The frequency range of the human auditory caused at about 20Hz-20000Hz. What people like to hear most is the 20Hz to hundreds of Hertz bass, and one of the important functions of the speakers is to enhance and improve the bass. We also know that there are inherent vibration frequency of any material, when the vibration frequency of the externally applied close to or equal to the natural frequency of this material, as long as adding small vibration can make the material have a great vibration.
The damping characteristics of good quality wooden sound box, downier. But the less rigid, so the wooden box with a bass sound box vibration makes it difficult for us to hear the music source of pure bass, bass in the replay is always has a clear-cut sense of fuzzy.
The natural vibration frequency of slate of solid inorganic materials is almost difficult to resonate with loudspeaker frequency in infrasonic section. In contrast, the thermal conductivity of slate is better than that of wood, which can balance the temperature inside and outside the box and reduce the transient distortion.
As we all know, in a complete set of sound or home theater system, the quality of the speaker depends largely on the quality of the system. Good sound box is not only sound playback effect is good, more importantly, the energy and enthusiasm of the music can be passed to you. Hope that the above four purchase suggestions can provide some reference for you to select the favorite speakers, so that you can more easily experience the good mood brought by music.