If you are new to the speaker world, you have to understand that every sound speaker, whether small or the most powerful one, all are designed with a permanent magnet. The pushing and pulling force helps to move the speaker cone rapidly in and out for it to produce sound.
Speaker manufacturers utilize various types of magnets to suit speakers of different sizes and to achieve a range of tone qualities. Before you tell how strong speaker magnets are, you have to understand the types of speaker magnet. Let’s demystify these types here below.
1. Alnico Magnet
Alnico magnet used to make original speaker magnets, which is an alloy of aluminum, iron, nickel, and cobalt. The good thing with speakers using Alnico is its tough nature and less prone to cracking than most of the other materials.
But they can sometimes lose their magnetism more readily. Alnico is expensive than neodymium and ferrite and gives speakers a classic and warm tone.
2. Samarium Cobalt
This type is used less often by manufacturers due to its high cost. It has most of the strength of neodymium and has great heat resistance.
Samarium magnet tends to be as brittle as neodymium but can withstand corrosion and moisture.
3. Neodymium Magnet
If you want a good sound from a speaker, you need a powerful magnet. Out of all magnets available, neodymium has the greatest field strength known in the permanent magnet family. Speakers designed with this magnet have a good frequency response because of its sturdy magnet.
If you plan to use smaller speakers, the smaller the magnets will be used to fit and balance sound production. Therefore, the level of magnet used depends on the size and weight of the speaker. Neodymium magnets are made with high-fidelity earbuds as they can pack a strong magnetic field into a tiny package.
The only downside about neodymium magnets is that they shatter the magnets easily.
4. Ferrite Magnet
This type of magnet may be considered the cheap type and cracks more easily than a metal type of magnet. They maintain their magnetic strength well over time, provided you do not bring a stronger neodymium magnet near it. Their weight makes the speaker system to be heavier, which is a drawback for portable guitar amplifiers and portable speakers.
Speakers that are designed using ferrite magnets tend to sound better when played louder.