The use of loudspeakers

To choose the speaker according to the field of use and the requirements of the sound, the combination of the characteristics of the speaker. For example, the outdoor broadcast voice based, can be used as a tube type electric loudspeaker, high quality requirements, should use the electric loudspeaker box or column: general indoor radio, optional electric single cone loudspeaker made of small speakers: or for high quality Yang PA to appreciate music is. Should be chosen by the high bass speaker combination loudspeaker box.

In the use of a loudspeaker and a corresponding note the following points:

（1）The power of the speaker is not more than the rated power, otherwise, the sound will be burned, or the voice coil vibration. Electromagnetic and piezoelectric ceramic type loudspeaker working voltage not more than 30V.

（2）Note the speaker impedance should be fitted with the output line, it could see a megaphone.

（3）To correct the speaker's model. Such as in the use of the square, should use the high pitched speakers; in the indoor use, should choose the paper basin speakers, and choose to help speakers. Can also be high, the bass speaker group, to expand the frequency response range.

（4）When arranging the loudspeaker, to achieve sound and sufficient sonion uniform, such as the use of a single speaker (point) can't satisfy the needs of multi point setting, make every audience get almost the same loudness, improve the clarity of voice; have a good sense of direction, the speaker should be installed above the ground 3 meters above. Let the audience to "see" to the speaker, and try to keep the level range of hearing (source) a vision (the speaker) to be consistent, and the distance between two speakers can not be too large.

（5）Electric horn loudspeaker, the sound in the horn on the head must be used after, otherwise it is easy to damage the sound head.

（6）Two people in the use of speakers, we must pay attention to the phase problem. If it is inverted, the sound will be significantly weakened. The most simple method of measuring speaker phase by high sensitivity 50~250 A header or 000 ammeter block, the test table is connected with the connection head speaker, hands hold paper pots, push it, then you can determine their direction from the swing phase. If the same phase, the swing in the direction. At this time the voice coil is connected with the pen head is cited as the "ten" level.