Because neodymium magnets allow for designing in the highest magnetic fields, they provide the most powerful performance. Speaker Magnets Types Not Great For: The only downside about neodymium magnets is that they shatter the magnets easily.
Alnico Magnets. Alnico magnet used to make original speaker magnets, which is an alloy of aluminum, iron, nickel, and cobalt. Most alnico loudspeakers were used in some of the earlier permanent magnet drivers.
The good thing with speakers using Alnico is its tough nature and less prone to cracking than most of the other materials. Alnico is expensive than neodymium and ferrite and gives speakers a classic and warm tone. Best Used For: The great thing about alnico speakers is that they allow for higher performance and reducing demagnetizing effects. In fact, if designed well enough, they can offer a magnetic field that can perform as well as neodymium magnets but with greater axial length The greatest advantage of these speakers is that they are very easy to magnetize.
They are also easy to weaken which can allow for precision tuning. This then allows for better tuning and optimum acoustic performance. In terms of temperature resistance, thee speakers allow for great resistance regardless of temperature variations.
As such, you can achieve consistent performance within a wide temperature range. These speakers also have better corrosion resistance than neodymium. Since these magnets offer such great properties, why are neodymium magnets so much more popular? Well, neodymium magnets are mostly used for regular speaker applications while alnico speakers are mostly used in precision drivers and more external applications such as horns.
Samarium Cobalt Magnets. 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. Best Used For: Samarium Cobalt magnets are much better at maintaining a steady output in the magnetic field with temperature variations. Only alnico magnets offer better consistency in magnetism over a temperature range. They also offer better corrosion resistance compared to neodymium magnets.
In general, Samarium Cobalt magnets are mostly used to create drivers that are used in special applications such as extreme hot and cold environments or even marine environments. Academically speaking, these speakers are called electrokinetic dynamic or moving coil. When a current channel line is placed vertically between the north and south poles of the magnet, the channel line will be moved by the interaction between the magnetic line and the current.
When a piece of vibration film is attached to the channel line, the vibration film will move before and after the current changes. A movable iron chopper is installed in the middle of a U-type magnet. When the current flows through the coil, the armature will be magnetized and the magnet will absorb, and at the same time, the vibration film will move. This design is inexpensive but ineffective, so it is mostly used in telephones and small headphones.
Similar to the electromagnetic principle, but double the armature and the two voice coils on the magnet are not symmetrical. When the signal current passes through, the two armature will push each other for different magnetic flux. Unlike electromagnetism, inductance can regenerate lower frequencies, but its efficiency is very low. Usually, plastic diaphragms are vacuum vaporized with inductive materials such as aluminum.
Two diaphragms are placed face to face. When one of the diaphragms is added with positive current and high voltage, the other one will induce a small current, and the sound can be produced by attracting and repelling each other. Because of its lightweight and small vibration dispersion, electrostatic monomers are easy to get clear and transparent treble, fail to catch bass power, and its efficiency is not high.
It is easy to collect dust by using DC electrodes. At present, manufacturers such as Martin-Logan have successfully developed a hybrid speaker with electrostatic and movable coils, which solves the problem of insufficient bass of electrostatic body and is widely used in headphones. Bengaluru, Karnataka. Thane West, Thane No. Thane, Maharashtra. Sanganer, Jaipur Shop No. Jaipur, Rajasthan.
Bengaluru No. Nagar, 8th Phase, Bengaluru - , Dist. Sonipat, Haryana. Delhi No. Ahmedabad, Gujarat. Chandni Chowk, New Delhi No. Chandni Chowk, Delhi No. Parrys, Chennai Old No. Ludhiana, Punjab. Coimbatore, Tamil Nadu. Delhi Pocket D-8, House No. North Paravur, Kochi, Dist. Ernakulam, Kerala.
Have a requirement? Get Best Price. Speaker Magnet 83 products available Video. View by: Product Supplier. Location Near Me. Will it be installed in an automobile? Is the voice coil optimized for the magnet? How well are the other components matched? Are size and weight important factors?
Does the speaker use compression drivers? Compression drivers require a lot of power to drive the sound through an orifice -which might favor Neodymium magnets.
But why not design a ferrite compression driver? It can be —and has been- done with both magnets. Then what about small speakers —like the ones in mobile phones and headphones? These speakers have grown to be a big part of the electroacoustic market. What materials do they use? And why? Automotive speakers are usually designed to fit in tight automobile spaces. These spaces are often not ideal for the same design that would be placed in a home setting.
Concert systems are larger. Then the depth of the speaker might also factor into the equation. A smaller Neodymium magnet can help a designer make the speaker fit into a tighter envelope than a ferrite speaker would allow. If a design is dependent on high magnetic field strength, it is best optimized by using a magnet with the strongest magnetic field. A strong magnetic field will lead to smaller dimensions in other parts of the design.
For example, a stronger magnetic field leads to smaller motors, because now the motor can generate more torque in a smaller diameter than can be achieved by a magnet with a weaker magnetic field. Will the magnet encounter a strong demagnetizing field? Neodymium magnets have the strongest Coercivity at room temperature and even at mildly elevated temperatures.
This means they exert a very strong resistance to demagnetization in the presence of an opposing magnetic field at temperatures of up to degrees C. A smaller motor allows for other component sizes to be minimized.
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