Shijiazhuang ktv audio and professional amplifier how reasonable allocation?

Release time:

2019-08-09

Summary： From the artistic point of view, the matching of professional power amplifier and speaker should be suitable for warm and cold, with moderate hardness and hardness, so as to make the whole set of devices neutral in tone. From the technical point of view, professional power amplifier and speaker matching have the following points: power matching; impedance matching; damping coefficient matching. Next, Sheng Huang Audio will discuss with us in detail in combination with three aspects.

When we design and install Shijiazhuang ktv audio, it is inevitable that there will be a mismatch with professional amplifier. How should we make a reasonable allocation? The following small series to help you.

From the artistic point of view, the matching of professional power amplifier and speaker should be suitable for warm and cold, with moderate hardness and hardness, so as to make the whole set of devices neutral in tone. From the technical point of view, professional power amplifier and speaker matching have the following points: power matching; impedance matching; damping coefficient matching. Next, Sheng Huang Audio will discuss with us in detail in combination with three aspects.

1. Power matching problem

The extra power of KTV audio is equal to the extra output power of professional power amplifier power, so that the device can operate normally. It is suggested that you would rather pull a big horse than a small horse. In the conditions, can choose high-power professional power amplifier, absolutely don't choose small power. Under normal circumstances, at least to do professional power amplifier additional output power is greater than 2 times the speaker power. Big horse-drawn car, although it will cause unnecessary waste of power, but the situation of small horse-drawn car, so that the speaker can not meet the propulsion power, the whole KTV sound system can not play the best KTV sound effect.

2. Impedance matching

The output of the professional amplifier and the input impedance of the speaker should also be common. Although there are some slight deviations between the two, it will not have a significant impact on the sound quality, but only on the output power of the professional power amplifier, but it must be reminded that if the input impedance of the speaker is much lower than the output impedance of the professional power amplifier, it will cause a significant increase in distortion, and in serious cases, it will also damage the professional power amplifier. So we still try to choose the two common good.

3. Damping coefficient matching

The damping coefficient KD is defined as: KD = additional output impedance of professional power amplifier (equal to additional impedance of speaker)/internal resistance of professional power amplifier output. Because the internal resistance of the professional power amplifier output has actually become the electrical damper of the speaker, the KD value determines the amount of electrical damping of the speaker. The larger the KD value, the heavier the electrical damping amount. Of course, the larger the KD value of professional power amplifier is not, the better. Too large KD value will make the electrical damping of the sound box too heavy, which will cause the pulse front to set up a constant growth and reduce the transient echo index. Therefore, in the selection of professional power amplifier should not be one-sided pursuit of large KD value.

What we need to know is that if the damping coefficient is too high, the sound from the speaker will be dry and not round. If it is low, it is easy to show the feeling that the sound is stuck together. Therefore, when we are making professional power amplifier configuration, we should pay attention to the damping coefficient of the stone machine being controlled between 30 and 40, while the internal resistance of the gallbladder machine is high, so we must not exceed 10.

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