Magnetofluid can reduce the working temperature of the voice coil, improve the rate bearing capacity of the tweeter, improve the frequency response, help the voice coil to maintain the center position, reduce distortion and power compression effect, improve the dynamic performance, prolong the service life of the speaker.
What is magnetofluid?
A magnetic fluid (perhaps called a ferrofluid or magnetic fluid) is a brownish black liquid magnet that consists of ultrafine magnetic particles about 10 nanometers in diameter suspended uniformly in a synthetic oil carrier.
What is the effect of magnetic fluid?
After adding a certain amount of magnetic fluid into the gap formed by T iron and Wasi of the loudspeaker, the power of the loudspeaker will be improved obviously and the service life of the loudspeaker will be prolonged. In general, the power of the speaker is limited by the heat resistance of the voice coil. The greater the power, the greater the heat, causing the temperature of the voice coil to rise sharply, and when the voice coil material reaches its limit, the voice coil will burn. And the heat conduction coefficient of magnetic fluid is far greater than that of air, it can effectively send out heat energy through T iron, Washi and basin frame in the air, thus preventing the voice coil from being burned, delaying the aging of the voice coil material and binder, thus prolongs the life of the speaker.
Improve the frequency response characteristics, reduce the distortion of the loudspeaker, magnetic fluid has a certain damping, loudspeaker in its lowest resonant frequency (F0) near the frequency response curve will have a peak, due to the large amplitude of the diaphragm distortion. This is a flaw loudspeaker makers hope to overcome. The frequency response curve of loudspeaker at F0 can be smoothed by using the damping effect of magnetic fluid with proper viscosity on voice coil movement. Thus, the frequency response characteristics are improved, which is beneficial to simplify the design of the frequency divider circuit. The magnetic fluid also has the function of center positioning, which can prevent the phenomenon of wiping the voice coil in the large amplitude.
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