Many people think that professional audio is very complicated and prone to errors, especially for large-scale singing and dancing performances, important conference amplification, etc. Even experienced sound engineers will make mistakes when they encounter important people.

However, this difficulty is only one side of the problem. For most sound engineers, the difficulty is nothing more than a little understanding of the so-called professional audio: use a "multimeter" to measure the power of the speaker, or use a "sound pressure meter" to adjust the loudness of the venue, etc. Wait, the leaders thought they were very professional, but they felt indescribably uncomfortable in front of the microphone.

In this way, we need to correct some basic conceptual errors. Before confirming the past mistakes, let us correct a concept: professional audio is not equal to home audio. There is an essential difference between the two! All our discussions are in the professional audio range, and more specifically, we only discuss the sound reinforcement situation at high power.

Another difference between professional audio and domestic speakers is in the bass. The bass of the domestic box is heard, while the bass of the professional box is felt. What is the feeling, it is the vibration of the air, it is transmitted to us, we feel the air waves, this feeling is very special. Like underwater, we hear a lot of sounds by feeling. In order to feel this kind of bass, the requirements for the cabinet are particularly high.