Cause analysis of low sensitivity and low sensitivity

The reason of low sensitivity and low sensitivity of the speaker may be that the sound coil can be burnt or the insulation paint is falling off, causing a short circuit, and the part that is not burnt or the insulation is not falling off. In order to reduce the occurrence of this phenomenon, should be in pre production to double check good voice coil short circuit phenomenon; using the speakers should be within the rated power work, in order to avoid high power burned voice coil; also check the voice coil DC impedance deviation is too large.
in addition to the above will be the emergence of sound pressure, low sensitivity, as well as voice coil positioning is too high or too low, the poor performance of the magnet, vibration material is not the same can also cause the sound pressure, low sensitivity, and then how to prevent it? In the ring tone, the sound coil of the high center should be in the same plane with the thickness of the center, but also check whether the smooth material on the speaker is elastic, if not the elasticity should be immediately replaced the new material, because the flexibility is not smooth, the sound will be down, the voice coil will be only a small volume in the magnetic gap, will lead to a decrease in the sensitivity of tone. < br / > in the selection of magnet, should choose the good performance of the magnet, if magnet performance poor, magnetizing voltage is not up to the requirements, it can not fully saturated, there will be sound pressure, low sensitivity. Should pay attention to in magnetized, it is necessary to pay attention to the magnetizing time interval, such as magnetizing voltage recovery after further magnetization, the magnetizing wires package does not overheat, magnetizing the way, method, direction and angle should operate in strict accordance with the rules.
speaker of the vibration film quality, thickness, material must be consistent, otherwise it will affect the high frequency, low frequency, low frequency, frequency characteristics and sensitivity, but also pay attention to the soft hardness of the cis element, to ensure the basic consistency of the speaker frequency.