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The microphone can not be ignored for use

Select the microphone, should be based on the use of the occasion and the sound quality requirements, combined with the characteristics of a variety of microphones, consider the selection. For example, high-quality recording and broadcasting, the main requirements of good sound quality, should use a condenser Beats Headphones On Sale microphone, aluminum microphone or advanced moving coil microphone; for general public address, the choice of ordinary moving coil can be; when the speaker position from time to time to move Or speech with a large distance from the amplifier, such as karaoke singing, should use unidirectional, low sensitivity of the microphone to reduce noise interference. The use of condenser microphones requires phantom power, generally in the microphone's technical parameters are described in the supply voltage, to choose the appropriate voltage phantom Beats By Dre Cheap power, the mixer is equipped with a general 48V phantom power supply.

In use should also note:

1, impedance matching

When using a microphone, the output impedance of the Beats By Dre Cheap microphone is the same as the input impedance of the amplifier. If the mismatch ratio is more than 3: 1, the transmission effect will be affected. For example, the 50 microphone connected to the input impedance of 150 amplifier, although the output can be increased by nearly 7Db, but the high and low frequency of the sound will be a significant loss.

2, connecting line

Microphone output voltage is very low, in order to avoid loss and interference, the cable must be as short as possible, high-quality microphone should choose dual-core twisted metal shielded wire, the general microphone can be single-core metal shielded wire. High-impedance microphone transmission line length should not exceed 5 meters, otherwise the treble will be a significant loss. The connection of the low-impedance microphone can be extended to 30m-50m.

3, working distance and near effect

Usually, the working distance between the microphone and the mouth in the 750px-1000px is appropriate, if the distance is too far, the echo increases, the relative increase in noise; working distance too close, because the signal is too strong and distortion, low frequency sound and affect the language The clarity. This is because the directional microphone there is a "near effect", that is, close-range broadcast, the low-frequency sound will be significantly improved. However, sometimes the singer intends to use the "near effect" so that the singing effect is more wonderful, beautiful.

4, the angle between the sound source and the microphone

Each microphone has its effective angle, the general sound source should be aligned microphone centerline, the greater the deviation between the two, the greater the loss of treble. Sometimes when using the microphone, with a "long trained" sound, then the microphone deflection of some angle, you can reduce some.

5, microphone position and height

In the case of loudspeakers, the microphone should not be placed near the loudspeaker or at the loudspeaker, otherwise it will cause a whistle.

The height of the microphone should be set according to the height of the sound source. If a person speaks or a few people sing, the height of the microphone should be consistent with the mouth of the artist. When the Beats By Dre Sale" href="/">Beats By Dre Sale number is large, the microphone should choose the average height and place the singer And accompaniment and the location of the various instruments in the team, do not make the sound of the ring, light too light, and to make all the sound within the effective angle of the microphone. If there is a lead or lead, if necessary, should be placed special microphone.

When several microphones are used at the same time, you can take a parallel connection, but you must pay attention to the phase of several microphones. Phase in order to be parallel to each other, otherwise they will interfere with each other, so that the output is reduced, distortion. Different models and different impedance of the microphone, should not be used in parallel, because the high-impedance microphone "short circuit", so that the output voltage down to very low. Under normal circumstances, the microphone is used directly in parallel, the effect is not as good as a single microphone.