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How to choose speakers from technical parameters

Release time: 2021-10-14    Viewers: 13

Now the speaker market is chaotic, and prices are flying everywhere, ranging from tens of yuan as low to as high as 10,000 yuan. So how do you choose a speaker that suits you? Before buying speakers, be sure to clarify your needs. Is it to watch the power supply, play games, or listen to songs? There is also the price, the range that you can afford. Many rookies think that expensive is appropriate. In fact, many people can only listen to the music that the business puts you to listen to the effect, but they don’t understand the technical parameters at all. Companies with many years of experience will tell you these things and how to choose your own suitable speakers. The following is just a brief introduction to the technical parameters

Mainly explain from the aspects of sound technology, frequency response range, sensitivity, power, signal-to-noise ratio, distortion, and impedance.

1. Sound technology
Hardware 3D sound effect technologies are now more common, including SRS, APX, Q-SOUND and Virtaul Dolby. Although they implement different methods, they can all make people feel obvious three-dimensional effects, and one of them is the most common. .

2. Frequency response range

The frequency response range we are talking about here is the frequency range and frequency response. The former refers to the range between the lower effective playback frequency and the higher effective playback frequency of the speaker system; the latter refers to the audio output with a constant voltage When the signal is connected to the system. This technical index is an important parameter to examine the performance of a speaker, and it has a direct relationship with the performance and price of the speaker, so you must pay special attention when buying speakers, but now many manufacturers have false standards, so you still need to ear Listening is believable, you must be careful.


How to choose speakers from technical parameters


3. Power
This parameter is also rather confusing. To put it bluntly, power refers to how powerful the sound of the speaker can be. There are two kinds of labels for this power, rated power and larger withstand power (instant power or peak power PMPO). This will not be explained in detail. Just go to the search to find out. Under normal circumstances, in order to cater to consumer psychology, businesses usually set a large standard for music power, so the rated power shall prevail when purchasing multimedia speakers. It is hereby explained that it is not that the greater the power, the better, the better is the fit, and it is calculated based on the area.

Fourth, sensitivity
This indicator refers to the sound pressure level measured one meter in front of the vertical axis of the speaker plane when a 1W/1kHz signal is input to the speaker input terminal. The unit of sensitivity is decibel (DB). For every 3dB difference in the sensitivity of the speakers, the output sound pressure will be doubled. The sensitivity of ordinary speakers is in the range of 85-90dB. Below 85dB is low sensitivity, and above 90dB is high sensitivity. Generally, the sensitivity of multimedia speakers is slightly lower.

Five, impedance
This index refers to the ratio of the voltage to the current of the input signal. The input impedance of a speaker is generally divided into two types: high impedance and low impedance. Generally, high impedance is higher than 16 ohms, and low impedance is lower than 8 ohms. The standard impedance of speakers is 8 ohms. The nominal impedance of speakers on the market is 4 ohms, 5 ohms, 6 ohms, 8 ohms, 16 ohms, etc. Although this indicator has nothing to do with the performance of the speakers, it is better not to buy low-impedance speakers. The recommended value is the standard This is because when the power amplifier and output power are the same, a low-impedance speaker can obtain a larger output power, but if the impedance is too low, it will cause underdamping and bass degradation.

Six, signal-to-noise ratio
This index refers to the ratio of the normal sound signal and the noise signal played back by the speaker. The signal-to-noise ratio is low, and the noise is serious when a small signal is input. The sound in the entire sound range becomes turbid and unclear. I don't know what sound is being sent, which seriously affects the sound quality. Speakers with a signal-to-noise ratio below 80dB (including subwoofers below 60dB) are recommended not to be purchased.
This indicator refers to the ratio of the normal sound signal to the noise signal played back by the speaker. The signal-to-noise ratio is low, and the noise is serious when a small signal is input. It is recommended that speakers with a signal-to-noise ratio of less than 80dB (including subwoofers less than 60dB) are not purchased.


How to choose speakers from technical parameters


Seven, distortion
The definition of the distortion of the speaker is basically the same as the distortion of the amplifier. The difference is that the input of the amplifier is an electric signal, and the output is still an electric signal, while the input of the speaker is an electric signal, and the output is a sound wave signal. Therefore, the distortion of the speaker refers to the distortion of the electro-acoustic signal conversion. The allowable range of sound wave distortion is within 10%, and the general human ear is not sensitive to distortion within 5%. It is better not to buy speakers with distortion greater than 5%.
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