Magnet manufacturers take you to understand how to choose the speaker magnets?New

We all know that the speaker inside the speaker equipment, is responsible for the core important components of the sound, the speaker is a transducer that converts electrical signals into acoustic signals. The performance of the speaker has a great impact on the sound quality.SourceRare earth magnet-

Magnet manufacturers take you to understand how to choose the speaker magnets? SourceRare earth magnet-

A. What is a speaker magnet?SourceRare earth magnet-

Horn magnet, also known as horn word, is used in the speaker horn inside the magnet.SourceRare earth magnet-

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Second, the speaker magnet working principle.SourceRare earth magnet-

Magnet manufacturers take you to understand how to choose the speaker magnets?SourceRare earth magnet-

When the speaker receives the electrical signal output by the sound source device, the current will pass through the coil on the speaker and produce a magnetic field reaction. The current through the coil is alternating current, and its positive and negative poles are constantly changing; the positive and negative poles meet to attract each other, and the coil is attracted by the magnet on the speaker to move backward (inside the box); the positive and positive poles meet to repel each other, and the coil moves outward (outside the box). This rhythm of closing and expanding will produce sound waves and air currents, and emit sound, which is the same effect as the throat vibration of speech. The magnet in the speaker is used to make sound, if there is no magnet, the speaker speaker will not make sound.SourceRare earth magnet-

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Third, how to choose speaker magnets.SourceRare earth magnet-

Magnet manufacturers take you to understand how to choose the speaker magnets?SourceRare earth magnet-

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There are three kinds of speaker magnets in the market: Alnico magnet, ferrite magnet and NdFeB magnet.SourceRare earth magnet-

Alnico is the earliest magnet used for speakers, such as the tweeters in the 50s and 60s. Generally made into internal magnetic speakers (also external magnetic type).SourceRare earth magnet-

The disadvantages are low power, narrow frequency range, hard and brittle, and very inconvenient processing. In addition, cobalt is a scarce resource, and the price of alnico is relatively high. From the viewpoint of cost performance, there are fewer horn magnets using Alnico.SourceRare earth magnet-

Ferrite magnets are generally made into external magnetic horns. Ferrite magnetic energy is relatively low, and it needs a certain volume to meet the driving force of the horn. Therefore, it is generally used for louder audio speakers. The advantage of ferrite is that it is cheap and cost effective; the disadvantage is that it is large in size, low in power and narrow in frequency range.SourceRare earth magnet-

NdFeB magnets are far superior to Alnico and ferrite, and are the most used magnets on speakers, especially high-end speakers.SourceRare earth magnet-

The advantage is its small size, high power and wide frequency range under the same magnetic flux. Currently HiFi headphones are basically using this magnet. Disadvantage is because of rare earth elements, the material price is higher.SourceRare earth magnet-

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Fourth, the choice of speaker magnets to consider several factors.SourceRare earth magnet-

1, need to clarify the ambient temperature of the speaker work, according to the temperature to decide which magnetic material to use. Different types of magnets have different temperature resistance characteristics, and the maximum working temperature they can withstand is different. When the working temperature of the magnet exceeds the maximum working temperature, there may be magnetic energy decay, demagnetization and other phenomena, which will directly affect the sound effect of the speaker.SourceRare earth magnet-

2, we must consider the magnetic flux demand and magnet volume to choose speaker magnets. The loudspeaker magnet is not the louder the better. From the impact of magnet performance on the sound quality of the speaker can be seen, the magnetic flux of the magnet has a great impact on the sound quality of the speaker. We need to consider the volume of the speaker on the magnet volume limitations and the requirements of the permanent magnet flux performance.SourceRare earth magnet-

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