Notes on the use of loudspeakers

 Loudspeakers can be divided into many types according to their size, usage and use, each with its own advantages. Portable megaphones are limited by shape and horn, and the general power is only 3-8W. Wireless amplifier and wired amplifier is different size, different uses, smaller size suitable for teachers, tour guides to use, hanging around the waist, so that the hands play more free, its power is generally also 3W-8W. Large for outdoor activities, summer camps, after-school lectures and other high traffic places, power in 35W---95W. Lithium-ion loudspeakers are one of the categories classified according to the type of battery they use. It solves the problem of pollution to the environment of traditional dry batteries, which mainly uses lithium-electric cell phone technology to power the loudspeakers.

 Notes on the use of loudspeakers：

 1、When using the amplifier, the microphone should be avoided, the volume adjustment is appropriate and clear, so as to avoid distortion and feedback whistling phenomenon.

 2、Do not pull, drag microphone wire, otherwise it is easy to appear poor interwire contact.

 3、Host battery do not overcharge for a long time over-discharge, low power prompt should be timely charging, winter and summer vacation idle do not use should pay attention to one to two months to charge once。