For handheld wireless microphone, we should pay attention to: 1. hand do not hold in the head of the microphone net This is because, all the microphone's receiver part of a certain directivity, if you hold the hand on the part of the net cover, it will seriously damage the frequency response, but also due to the aggregation effect of the palm of the hand, resulting in focusing, back to the teaching. 2. Do not hold the microphone antenna transmitter part of the general handheld microphone, the transmitter circuit and antenna is located in the lower part of the microphone (away from the end of the microphone head), when we hold our hands, it will greatly attenuate the transmitter power, affecting the reception effect. 3.Don't hold two wireless microphone together to use As the handheld wireless microphone is two transmitter, itself will produce harmonic pool dew, when two wireless microphone close to each other, their mutual harmonic will modulate each other, produce interference, seriously affect the launch reception and sound quality. 4. microphone and mouth do not too close in use, the microphone and mouth distance is generally maintained at 5-10 cm for the best, too close, will produce the effect of close speaking, too far sound is very light, will destroy the sound quality. 5. Avoid microphone directly facing the speaker Microphone, such as directly facing the speaker, on the sound system, the formation of a closed loop, will produce positive feedback oscillation (whistling), which must be avoided. For lavalier microphone, the main thing is to prevent too far away from the mouth, should be as close as possible to the mouth, while the headband microphone is to avoid the mouth is facing the microphone head, to avoid the impact of the vocal airflow, should be moved to the sides. I hope this will help you!
The wireless amplifier should be the same, I use the AUDUN brand amplifier, wireless microphone is to be equipped with a receiver, some receivers are directly mounted in the amplifier, like the AUDUN AD-918R is directly mounted inside. If not installed inside, it is directly with a USB interface receiver plugged into the amplifier, with a * line on one side of the amplifier, on the other side of the receiver, connected to the middle, you can directly use.
There are 4 wires on the mobile amplifier, which are DC. This current type of amplifier must add an intermediate transformer. The input on this transformer is written in ohms. Such as: 0Ω 8Ω 16Ω output is written in voltage, such as: 0V 120V, that is, the low-frequency inductive signals into high-voltage current signals out. If the inductive amplifier is directly connected to the back of the amplifier board on the line.