How to achieve excellent sound effects under high power?

　　Many people think that professional audio is very complicated and easy to make mistakes, especially large-scale singing and dancing performances, important conference amplification, etc. Even if an experienced sound engineer meets an important person, they will make mistakes.

　　However, this kind of difficulty is only one side of the problem. For most sound engineers, there is nothing more difficult than a little understanding of the so-called professional audio: use a "multimeter" to measure the power of the speakers, or use a "sound pressure meter" to adjust the loudness of the venue, etc. Waiting, the leader thought that they knew the profession very well, but it was uncomfortable to speak into the microphone.

　　In this way, we need to correct some basic conceptual errors. Before we determine the past errors, let us correct one concept: professional audio is not equal to home audio. There is a fundamental difference between the two! All our discussions are in the scope of professional audio. More specifically, we only discuss the sound reinforcement under high power.

　　Another difference between professional audio and civilian speakers is the bass. The bass of the civilian box is heard, while the bass of the professional box is felt. What is a feeling? It is the vibration of the air that is transmitted to us. We feel the waves of air. This feeling is very special. Like underwater, we actually hear a lot of sounds by feeling. To feel this kind of bass, the requirements for the cabinet are particularly high.

　　How to achieve excellent sound effects under high power?

　　To achieve excellent sound effects under high power, we must focus on solving:

　　The first is box vibration. Because the cabinet vibration will cancel out the sound pressure of a specific frequency, causing distortion; another type of cabinet vibration, it can emit specific geometric noise, this noise is like the sound of two wooden boards hitting each other.

　　Of course, this noise is caused by the wood board and the production process. For example, the wood board is easily deformed/the production process is backward. Then there was noise.

　　The second is unit resonance. Because of the different unit structures, why use aluminum cones? There is nothing special under low power. Under high power, due to the effect of sound waves, the surface of the speaker will vibrate to some extent. (Of course, the ideal speaker design, any part of the speaker under high power (No vibration should be felt) This kind of vibration is transmitted back to the fixed unit. At this time, if the frame of the unit speaker is not strong enough, the bass frame will vibrate with the panel at the same time, and the voice coil will be in the center of the magnetic fluid. It will be damaged, cause serious distortion, and even cause ring rubbing, and the rear voice coil will burn.

　　How to achieve excellent sound effects under high power?

　　In order to reduce costs, a thin iron plate is used as the frame of the speaker, and the quality of the speaker is not good. This is one of the reasons. Usually, the thickness of the iron plate used in the speaker frame of 150WRMS power cannot be less than 1.2mm. Of course, the aluminum frame is better, because the frame of the aluminum frame is cast rather than stamped, so its geometric deformation is much smaller than that of the stamped iron frame.

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