The advantages of linear array sound amplification system are obvious.
(1) due to the characteristics of linear array, it presents a narrow beam directivity in the vertical plane of the spindle, and the energy superposition can radiate at a long distance. The lower end of the curved part of the linear column covers the near region, forming a self-close and distant covering.
(2) the improvement of linear array sound amplification box is more in line with the requirements of technology, process and installation.
The high frequency part in the middle is special. Two (JBL) or three (V) high frequency speaker outlets are connected together. FJ2j is called a sound wave generator by JBL company and plane wave generator by e-v company. According to the analysis by MAPP software, the directivity of linear array becomes more and more sharp as the frequency increases. When reaching a certain frequency, such as 2kHz, the directivity shows a radial pattern, that is, the lobe appears in the directivity diagram. At this time, the acoustic wave generator composed of high-frequency loudspeakers takes effect, strengthening the high-frequency directivity superposition.
(3) the linear array cannot ignore the mutual interference, and the linear array itself does not improve the sound quality.
1. In terms of category, line-array audio is long-range audio, while ordinary audio is short-range audio.
2. From the perspective of power, the power of linear array audio is mostly 3 frequency division, while the power of ordinary audio is mostly 2 frequency division.
3. From the perspective of applicable occasions, the sound of linear array acoustics is suitable for outdoor large evening party amplification, while ordinary acoustics are suitable for indoor celebration activities or household use.
4. From the perspective of sound coverage, linear array sound coverage is broader, and multiple sound systems can be combined into a sound group with the same amplitude and phase.
The sound box is an important part of the whole sound system, worth about half of the whole system, so it must be treated properly.
(1) avoid placing in direct exposure to the sun, do not close to heat radiation appliances, such as stoves, heating pipes, do not place in a humid place.
(2) speakers before connecting to the amplifier, should first cut off the amplifier power, so as not to damage the speaker.
(3) and the amplifier feeder connection should be safe, under the pull can not fall, positive and negative polarity can not be wrong. The feeder connecting the loudspeaker should be thick enough, not too long, so as not to cause loss and make damping bad. Response with deviation frequency maximum 0. The maximum length of 5dB (0.75mm2 wire is 9cm, 1.5mm2 wire is 14m, and 2.0mm2 wire is 21m.
Note that the impedance of the speaker is suitable for the recommended value of the amplifier
(5) do not exceed the rated power. Otherwise the sound quality will deteriorate and even damage the speakers.
6 shell should be wiped with soft, dry cotton cloth, do not besmear furniture wax or benzene, alcohol substances.
7. 7 speakers surface dust can only use soft brush clearance, can not be vacuumed.
Today speakers to be put on a strong, strong floor, lest bass attenuation. Don't place the speakers too close to the wall.
Don't put the speakers too close to the turntable to avoid creating acoustic feedback that causes screaming.
Attending, such as set, treble level adjustment, can be listened to the request to adjust to make happy.