Modern people are often overwhelmed by their busy work and troubled lives. Listening to music and watching large movies is a convenient way for us to relax. To get a shocking sense of listening, we need a good speaker.
Speakers can be divided into 3 categories: (1) Desktop speakers (also known as bookshelf speakers), generally used to connect computers, TVs to listen to music, and movies, suitable for use in a listening environment of 20 square meters. Some desktop speakers; (2) Floor-standing speakers, that is, speakers whose cabinets are placed on the ground, general home theaters use floor-standing speakers, which have a large volume, high sound density, high power, and strong sense of presence; (3) Monitor speakers are mainly used in professional environments such as recording studios. The sound is fidelity and the degree of restoration is high, and the price is relatively expensive.
To purchase a speaker, we need to understand several key parameters of the speaker: (1) The number of channels, which is the number of sound sources during sound recording or the number of corresponding speakers during playback. We often see speakers with 2.0, 2.1, 5.1 and other channels. The so-called "2.1" and "5.1" in the "1" refers to the subwoofer speakers, and 2 and 5 refer to the number of other speakers. For example, the 2.0 channel refers to the audio output of only the left and right channels; the 2.1 audio refers to the output of the left and right channels and the bass channel. 5.1 refers to the sound has left and right channels plus left and right surround plus a center and a bass output. The number and size of the channels supported by the speaker are not as good as possible. It should be selected according to the area and furnishings of the listening environment. Desktop speakers are generally 2.0 or 2.1 channels. (2) Rated power: refers to the maximum power that the power amplifier circuit can continuously output within the rated distortion range. That is, the maximum power released without the sound out-of-tune. There is no direct relationship between the sound quality of the speaker and the power. The power determines the maximum sound intensity that the speaker can emit. It feels like how powerful the sound from the speaker can be. (3) The frequency response range is an important indicator to measure the ability of the speaker. The maximum frequency range that can be accepted by the human ear is 20Hz to 20000Hz. The wider the frequency range, the more layered music is played, and the less the other way around. The bass of the speaker box is generally 40HZ, 50HZ, 55HZ, 60HZ ... The higher the bass frequency, the lower the price, and the worse the bass. (4) The degree of distortion refers to the difference between the ratio of the amplified signal and the original signal. It is better to choose the speaker instead of the "voice". This commonly used percentage indicates that, of course, the smaller the value, the better, and the distortion of the desktop speakers should be less than 0.5%. (5) Sensitivity refers to the input signal at full power output. The lower the input signal, the higher the sensitivity. The increase in sensitivity comes at the cost of sound quality. Too high will distort the sound quality. The sensitivity of 90dB is the middle value of most speakers. Remember, the more sensitive the better. (6) Signal-to-noise ratio, signal-to-noise ratio indicates the ratio of the sound signal and noise signal played back under normal conditions. In order to ensure the sound effect, it is recommended that speakers with a signal-to-noise ratio of more than 80dB can be included in the purchase. No matter how many parameters, it is just for reference. The best way to evaluate a speaker is to go to a physical store and listen to the real sound of the speaker.