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　　Talking about the key elements of optimizing stage sound effects　　In recent years, with the advancement of material civiliz

　Pre-amp and pure power amplifier are different　　1. Concept　　The front audio power amplifier is generally a differential red

　　　　First of all, we must adhere to the principle of practicality. Strictly speaking: Every abnormally formed product with ex

　　　　How to choose outdoor speakers? There are more and more outdoor speakers on the market, good and bad, it is not easy to c

　　　　1. Pay attention to the airtightness of the ktv speaker cabinet. Because the better the airtightness of the speaker, the

　　　　There are two main ways for noise to enter indoors. One is the noise of moving and static incident waves transmitted into