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However, any voice device has its strong points and weaknesses, but it has a finite number of calculations, and a low-level voice device is difficult to achieve and has an aesthetic effect. Anti-monger For general measurement, universally applicable external voltage resistance, direct measurement sound detector, DC voltage resistance. The estimated sound field DC voltage limit

Loudspeakers, commonly known as horns, are indispensable and important equipment in the audio system. All music is produced through the “horn”, just like the human throat, and it is the only equipment that converts electrical energy into “sound”. The character of the speaker plays a vital role in the sound quality of the audio system.