Choice of Home theater sound system from a technical point of view

Daniel

Member
The speaker box is the sound terminal equipment in the home theater system, which plays an important role in the whole home theater sound system. Speakers cost more than 50 percent of the total home theater sound system. Without a set of high indicators of the speaker box to do collocation, even if your amplifier, player performance and sound room is excellent, the total home theater sound effect still is in vain. Since speakers are so important in home theater sound systems, how do friends choose to buy a set of home theater speakers with ideal results? From a technical point of view, I summarized the following points to help friends who are about to buy home theater stereo:

1, speaker power. Simply speaking speaker power is how much sound the speaker can produce. Speaker power is divided into rated power and peak power. Friends must look at the power rating when buying a stereo. Speakers only work at rated power sound is the most real and natural, and only in this way my friends speakers can always work in a safe state. When friends choose and buy speakers audio-visual, the volume should be large enough, the power should be sufficient, but to ensure that there is no distortion. Of course friends should cooperate with their own room size of the audiovisual environment to choose and buy home theater speakers, power is bigger, some of the margin is better, so you can ensure that there is enough dynamic range. But it is not the bigger the better, the limited space in the speaker power is too big in addition to the power amplifier power requirements, but also the waste of the wallet, the speaker power is suitable is important. Generally, the power of the main speaker box in the room within 20 square meters is 80-100w, and the central surround speaker box is 50-80w. The output of the amplifier is about 120W in a single channel, and the active bass speaker box within 200W is enough.

2, frequency response range, also known as frequency response characteristics, is an important indicator to measure the performance of the speaker, and the speaker price has a direct relationship. The flatter the frequency response curve, the smaller the distortion, the better the performance. It is not that the wider the range of frequency response, the better the sound, but it is true for mid - and low-end audio products. Now a lot of speakers manufacturers to the frequency response range label range is not accurate, especially the low frequency part, so everyone in the purchase of speakers or to listen to the ear, do not be confused by the label manufacturers.

3. SNR is the ratio between the playback signal and the noise signal. The higher the ratio, the better the performance of the speaker. Signal manic ratio is lower than 80db speakers do not buy (subwoofer signal-to-noise ratio cannot be lower than 60dB) also do not, otherwise the noise is too big, the sound is fuzzy, listen to this sound effect people feel agitated, not in enjoyment but in suffering.

4. The index of sensitivity refers to the boost level measured by driving 1KHZ signal to the speaker with 1W push power at a distance of 1m from the vertical central axis of the speaker, expressed in db(db). For every 3db difference in the sensitivity of the speaker, the sound pressure difference of the output is 1 times. The speaker sensitivity below 85db is low sensitivity speakers, the speaker sensitivity above 90db is high sensitivity speakers, the general sound sensitivity is generally between 85db-90db, when buying speakers, the higher the better.

When choose home theater sound brands, according to your own situation, make scientific, rational choice. In the home theater sound system, there is no best, only more suitable for own.
 
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