How to choose a horn magnet
There are three main types of speaker magnets on the market: AlNiCo, Ferrite and NdFeB:
Alnico is the earliest magnet used in speakers, such as horn speakers (known as tweeters) in the 1960s. Generally made into 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 to be relatively small.
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 far superior to AlNiCo and ferrite, and it is currently the most used magnet on speakers, especially high-end speakers. Its advantages are its small size, high power, and wide frequency range under the same magnetic flux. At present, HiFi headsets basically use such magnets. The disadvantage is that because it contains rare earth elements, the material price is higher.
