China permanent magnet manufacturer:

What are speaker magnets?

Speaker magnets refer to the magnet used in the horn, that is, the magnet used in the horn.

How to choose a speaker magnet?

The speaker magnets on the market mainly include AlNiCo, ferrite and neodymium iron boron:

  • Alnico is the earliest magnet used in speakers, such as horn speakers (known as tweeters) in the 50s and 60s. Generally made of internal magnetic horn (external magnetic type is also available). The disadvantage is that the power is small, the frequency range is narrow, hard and brittle, and processing is very inconvenient. In addition, cobalt is a scarce resource, and the price of AlNiCo is relatively high. From the perspective of cost performance, horn magnets choose AlNiCo.
  • Ferrites are generally made of external magnetic speakers. Ferrites have relatively low magnetic properties and require a certain volume to meet the driving force of the speakers. Therefore, they are generally used in larger audio speakers. The advantage of ferrite is that it is cheap and cost-effective; the disadvantage is that it is larger in size, smaller in power, and narrow in frequency range.
  • The magnetic properties of NdFeB are much better than that of alnico and ferrite, and NdFeB is the most used magnet in loudspeaker, especially in high-end loudspeaker. It has the advantages of small size, large power and wide frequency range under the same magnetic flux. At present, hifi earphone basically uses this kind of magnet. Its disadvantage is that it contains rare earth elements, so the material price is high.

Several factors should be considered when selecting speaker magnet

  • First of all, it is necessary to determine the ambient temperature in which the horn works, and which magnet should be selected according to the temperature. Different magnets have different temperature resistance characteristics and can support different maximum operating temperature. When the working environment temperature of the magnet exceeds the maximum working temperature, magnetic attenuation and demagnetization may occur, which will directly affect the sound production effect of the horn.
  • Secondly, the horn magnet should be selected by considering the magnetic flux demand and the magnet volume. The louder the speaker is, the better the sound is? In fact, the bigger the magnet, the better. From the influence of the magnet performance on the sound output quality of the loudspeaker, we can find that the magnetic flux of the magnet has a great influence on the sound quality of the horn. Under the same volume, the magnet performance is: NdFeB > alnico > ferrite; under the same magnetic flux requirement, the volume of NdFeB magnet is the smallest and the ferrite is the largest. For the same magnetic material (the same material and same performance), the larger the diameter and the greater the magnetic induction, the greater the power of the horn is, the higher the sensitivity of the horn is, and the better the transient response is. Therefore, it is necessary to determine which kind of magnetic material to choose by considering the limitation of horn volume to magnet volume and the requirements of magnetic flux performance.

Add: some people ask how many cores and how much magnetism does the horn mean?
When we say how much magnetism the horn has, we mean the diameter of the magnet in the horn. For example, 100 magnetism means that the diameter of the magnet is 100 mm. The number of cores refers to the diameter of the voice coil. For example, 100 cores means that the diameter of the voice coil is 100 mm.

China Speaker Magnets Manufacturer supplies speaker magnets, loundspeaker permanent magnets, neodymium or ndfeb speaker magnets, ceramic / ferrite speaker magnets, headphone magnets, telephone magnets, megaphone magnets, audio, television and monitor speaker magnets for horn, in kinds of materials such as NdFeB/NIB/neodymium iron boron, etc.

This product is not a toy and is not to be used by children. This product is to be used for scientific experiments or for industrial applications. This product contains strong Neodymium magnet(s) that can be harmful or fatal if swallowed. Strong Neodymium magnets are fragile, they are brittle and will break or chip if they hit a hard surface or are snagged together. Always use the utmost care when handling Neodymium magnets.

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