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What is the role of magnets in the speaker？
Oct. 06, 2017
With the development of modern science and technology，More and more high-tech speakers appear in our vision，The speaker is an electroacoustic transducer，The principle is to convert electrical energy into mechanical energy into electrical energy，It involves three parts: electronics, mechanics and acoustics.The electric loudspeaker general production for high fidelity home speakers, notebook computer speakers, car speakers.
To understand the role of the magnet in the speaker, we first need to know the composition of the speaker and the magnet is located in which part of the speaker?The following picture is two dimensional and three dimensional split graphs of the Speaker.
2D Picture
3D Picture
Specification for the magnetic loop effect
Its role is to provide magnetic energy（The yoke and the magnetic loop, a pole piece, the magnetized magnetic lines of force generated in space），Atually,There is a horn coil paper pots on (called voice coil), audio signal to the voice coil, the current form, change the current intensity and direction of the voice coil in the magnetic field will change the position of the voice coil vibration, drive cone vibration, drive air vibration, the horn will make a sound.
For speakers, how do we choose the correct type of magnet?
1.Split up from the magnet shape, there are two kinds of discs and rings：
Disc Magnet
Ring Manget
2.Types of speaker magnets：
（1）：Ferrite Magnet
Powder sintering, then forming，The price is very cheap, widely used in different kinds of speakers
（2）:NdFeB Magnet
Sintering forming,The price is expensive, strong magnetism, easy oxidation, high temperature demagnetization.
（3）：AlNiCo Magnet
Sintering forming, high price, small magnetic coercivity, small coercivity, easy for demagnetization
(4):SmCo Magnet
Sintering forming,The price is expensive,strong magnetism,Suitable for high temperature applications（250°-320°)
The magnetic horn is usually made of ferrite magnets and NdFeB magnets. Ferrite permanent magnet is mainly used for medium and low grade headphones, NdFeB permanent magnet for high-end headphones, the sound quality is very good, good flexibility, good details, sound quality is good, the sound field positioning accuracy.
So Which one will you choose in the form of NdFeB Magnet and Ferrite Magnet?
The price fluctuation of neodymium iron boron has led to the frequent occurrence of the recent design of ferrite unit.Review of neodymium metal prices,At that time, we have questions for that:Whether the rarity of this metal will lead to an end to the speaker design?In the past 12 months, prices have continued to fluctuate and have experienced rapid growth before falling, as we have seen in the winter of 2016.
This price fluctuation directly led to the design of some manufacturers and suppliers using ferrite units, they began to turn to different options，This is wise, because many people use neodymium metal where they don't need it.This approach is easy to manufacture, but due to the current cost increase, I personally should be more careful to look at this issue, and ferrite is a good solution.
That is to say, the instability of prices and the panic over the supply of scarce metals have led many speaker manufacturers to take seriously into account the use of the metal. Recently, the price of neodymium has increased by 3% to 5%, but manufacturers are not willing to put the neodymium metal in the new speaker products, because the price has gone up.Once the speaker is placed in a box, it is difficult to replace the entire life cycle of the product，Taking into account the current rise in the price of neodymium and generally, we generally choose to use new materials in new products. According to the design changes, everyone will face a huge challenge, redesign and adjust the box, in order to adapt to the more heavy ferrite unit.
The price of ferrite magnets has been stable and can even be predicted, which is a great boon for speaker manufacturers.Lower cost is an important factor for a wide range of metals used in the speaker industry.That is to say, its cost / quality ratio is excellent. The recent instability in the supply of neodymium magnets has led to an increase in costs, and for most customers, they are faced with unacceptable quality / performance ratios.
Unfortunately, the lower cost of ferrite can not be completely converted into lower speaker costs，The magnet which satisfies the requirements usually has a larger radius and a heavier mass.Because of the need for a larger assembly and more rugged accessories, the use of ferrite speakers, the cost of completing a set of speakers in the final 10% to 30% floating.
Although this is a significant cost reduction initiatives, it does not apply to all occasions.Unfortunately, we can not completely make Ferrite magnet replace the Neodymium magnets, because its electromagnetic performance is better.
In fact, the controversy between ferrite and NdFeB is very simple. As we all know, the main profit from the price, and the main advantage comes from the weight,Another important problem is the electromagnetic properties of neodymium at high temperature,The new material itself has a lower Curie point.
From the cost point of view, ferrite is cheaper, so the use of ferrite low-frequency unit can provide a lower price,The neodymium iron boron pressure driving unit can obtain a good high frequency output,but the ferrite must have the same effect at the cost of larger and heavier designs.
Therefore, the road may be placed in front of many companies become more obvious,They can create speaker systems for different occasions,The utility model can be used as a commercial loudspeaker with a ferrite unit or a neodymium iron boron magnet, which can meet the needs of the concert tour system.
We look forward to NdFeB magnets have a more stable supply and lower cost，But for the time being, we still believe that ferrite has the best performance / value ratio.The debate will continue，Two technologies have their own advantages，But there is no doubt that the bottom line for the price of the cost will determine the direction of the form. At this point, the cost and performance ratio determines the ferrite design more popular. But we have made a number of relevant witnesses to understand that this will not be the norm, and it is likely to change quickly and easily.
Ferrite magnets are the most common magnets used in the manufacture of speakers, but the portability of neodymium magnets is not negligible. As we have come to the conclusion of last year, the metal NdFeB magnets will still be the choice of many people, but with the emergence of more ferrite, it will be increasingly difficult to choose.
3D Picture
Specification for the magnetic loop effect
Its role is to provide magnetic energy（The yoke and the magnetic loop, a pole piece, the magnetized magnetic lines of force generated in space），Atually,There is a horn coil paper pots on (called voice coil), audio signal to the voice coil, the current form, change the current intensity and direction of the voice coil in the magnetic field will change the position of the voice coil vibration, drive cone vibration, drive air vibration, the horn will make a sound.
For speakers, how do we choose the correct type of magnet?
1.Split up from the magnet shape, there are two kinds of discs and rings：
Disc Magnet
Ring Manget
2.Types of speaker magnets：
（1）：Ferrite Magnet
Powder sintering, then forming，The price is very cheap, widely used in different kinds of speakers
（2）:NdFeB Magnet
Sintering forming,The price is expensive, strong magnetism, easy oxidation, high temperature demagnetization.
（3）：AlNiCo Magnet
Sintering forming, high price, small magnetic coercivity, small coercivity, easy for demagnetization
(4):SmCo Magnet
Sintering forming,The price is expensive,strong magnetism,Suitable for high temperature applications（250°-320°)
The magnetic horn is usually made of ferrite magnets and NdFeB magnets. Ferrite permanent magnet is mainly used for medium and low grade headphones, NdFeB permanent magnet for high-end headphones, the sound quality is very good, good flexibility, good details, sound quality is good, the sound field positioning accuracy.
So Which one will you choose in the form of NdFeB Magnet and Ferrite Magnet?
The price fluctuation of neodymium iron boron has led to the frequent occurrence of the recent design of ferrite unit.Review of neodymium metal prices,At that time, we have questions for that:Whether the rarity of this metal will lead to an end to the speaker design?In the past 12 months, prices have continued to fluctuate and have experienced rapid growth before falling, as we have seen in the winter of 2016.
This price fluctuation directly led to the design of some manufacturers and suppliers using ferrite units, they began to turn to different options，This is wise, because many people use neodymium metal where they don't need it.This approach is easy to manufacture, but due to the current cost increase, I personally should be more careful to look at this issue, and ferrite is a good solution.
That is to say, the instability of prices and the panic over the supply of scarce metals have led many speaker manufacturers to take seriously into account the use of the metal. Recently, the price of neodymium has increased by 3% to 5%, but manufacturers are not willing to put the neodymium metal in the new speaker products, because the price has gone up.Once the speaker is placed in a box, it is difficult to replace the entire life cycle of the product，Taking into account the current rise in the price of neodymium and generally, we generally choose to use new materials in new products. According to the design changes, everyone will face a huge challenge, redesign and adjust the box, in order to adapt to the more heavy ferrite unit.
The price of ferrite magnets has been stable and can even be predicted, which is a great boon for speaker manufacturers.Lower cost is an important factor for a wide range of metals used in the speaker industry.That is to say, its cost / quality ratio is excellent. The recent instability in the supply of neodymium magnets has led to an increase in costs, and for most customers, they are faced with unacceptable quality / performance ratios.
Unfortunately, the lower cost of ferrite can not be completely converted into lower speaker costs，The magnet which satisfies the requirements usually has a larger radius and a heavier mass.Because of the need for a larger assembly and more rugged accessories, the use of ferrite speakers, the cost of completing a set of speakers in the final 10% to 30% floating.
Although this is a significant cost reduction initiatives, it does not apply to all occasions.Unfortunately, we can not completely make Ferrite magnet replace the Neodymium magnets, because its electromagnetic performance is better.
In fact, the controversy between ferrite and NdFeB is very simple. As we all know, the main profit from the price, and the main advantage comes from the weight,Another important problem is the electromagnetic properties of neodymium at high temperature,The new material itself has a lower Curie point.
From the cost point of view, ferrite is cheaper, so the use of ferrite low-frequency unit can provide a lower price,The neodymium iron boron pressure driving unit can obtain a good high frequency output,but the ferrite must have the same effect at the cost of larger and heavier designs.
Therefore, the road may be placed in front of many companies become more obvious,They can create speaker systems for different occasions,The utility model can be used as a commercial loudspeaker with a ferrite unit or a neodymium iron boron magnet, which can meet the needs of the concert tour system.
We look forward to NdFeB magnets have a more stable supply and lower cost，But for the time being, we still believe that ferrite has the best performance / value ratio.The debate will continue，Two technologies have their own advantages，But there is no doubt that the bottom line for the price of the cost will determine the direction of the form. At this point, the cost and performance ratio determines the ferrite design more popular. But we have made a number of relevant witnesses to understand that this will not be the norm, and it is likely to change quickly and easily.
Ferrite magnets are the most common magnets used in the manufacture of speakers, but the portability of neodymium magnets is not negligible. As we have come to the conclusion of last year, the metal NdFeB magnets will still be the choice of many people, but with the emergence of more ferrite, it will be increasingly difficult to choose. 
