In the field of sound reinforcement, the configuration of audio equipment is very exquisite, among which the configuration of power amplifier and speaker is important. Although the instructions for the use of some speaker products recommend the specific brand or model of the power amplifier to users, there are still limitations, because users often face many models of power amplifier, and have no way to start. Next, Shandong public broadcasting audio manufacturer will tell you about the configuration and solution of power amplifiers and speakers in public broadcasting.
The configuration of power amplifier and speaker involves many aspects, such as the selection of power amplifier brand, power tube type and which power amplifier should be configured for low-sensitivity speaker. The specific configuration of power amplifiers and speakers is generally related to the experience, hobbies, listening habits and other factors of designers. It is difficult to find a unified standard.
Sometimes we will encounter some users or designers who often configure the speaker with a smaller power amplifier to save money, and some users configure the speaker with a large power amplifier for the so-called "sufficient power reserve". Obviously, it is inappropriate to do so. It is important that this configuration will cause damage to the device. In the configuration of power amplifier and speaker, the power of power amplifier is indeed the key, that is to say, the determination principle of power amplifier should be unified.
The power configuration of power amplifier and speaker is also related to the target loudness and the use occasion. Under a certain target loudness, the dynamic of the music signal should be fully guaranteed on every device. If the power amplifier is too large and its gain setting is too small, the loudness has reached the requirements, but at this time the gain of the power amplifier limits the dynamic range of the signal. Therefore, the power amplifier should not be too large; Otherwise, since the expense is wasted, the loudness and music dynamics cannot be taken into account and the speaker is overloaded.
According to past experience, there are differences between general language, music amplifying places and large dynamic discos and other places. There is little signal fluctuation in general public address places, and it is not necessary for the power amplifier to provide a large amount of current to the speaker box for a long time or soon, so the power of the power amplifier should be smaller than that of the large dynamic public address places that require strong power; In addition, the so-called "power reserve" should also be targeted at the speaker. It is worth noting that the selection of power amplifier must be determined by the speaker. There should be no concept of "power reserve" to configure the power amplifier.
At a certain target loudness, the speaker can be larger than the design value for different purposes, and the power of the power amplifier should be strictly determined by the speaker, without much flexibility. In short, the specific standards for power allocation of power amplifier and speaker should be:
Under certain impedance conditions, the power of the power amplifier should be greater than the power of the speaker, but not too large. In general applications, the distortion rate of power amplifier should be about 1.2-1.5 times of the rated power of the speaker; In large dynamic situations, it should be about 1.5-2 times. The configuration according to this standard can ensure that the power amplifier works in a good state and the safety of the speaker. Even for inexperienced operators, as long as it is not a serious error in operation or improper adjustment of the previous peripheral equipment, the speaker and power amplifier can work in a stable state. Come to our website for more relevant content https://www.wenguangzhineng.com consulting service