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What Type of Earphones Use Neodymium Magnets?


There has been an increase in the popularity of high-tech headphones and earbuds. It is important to note that neodymium magnets in headphones are better than others. Transducers of energy, that’s what headphones are. In other words, they transform one kind of energy into another form of energy. Consequently, most headphones incorporate neodymium magnets in their drivers, which is why they sound so good. Sound waves (electrical energy) are converted into sound waves by headphones’ transducers (mechanical energy). Neodymium magnets are used in the most effective headphones.

What is the Principle?

Most headphones rely heavily on neodymium magnets. This is because the driver in most headphones needs a magnetic field to work correctly.

Sound waves are generated from electrical audio signals by the headphone driver, which is an essential transducer component. Neodymium magnets are the primary energy converters in most headphone drivers.

Neodymium magnets create a persistent magnetic field that attracts and repels the diaphragm or the wire that controls the diaphragm, depending on the application.

Neodymium magnets are necessary if a dynamic headphone’s diaphragm is to move and create sound.

Some headphone transducers do not need neodymium magnets to operate. Instead of electromagnetic induction, electrostatic headphones use electrostatic principles and do not involve any neodymium magnets in their construction.

What is a Neodymium Magnet?

Permanent magnets made of neodymium are the strongest on the market. Ceramic magnets, the runner-up, have ten-fold lower holding power. Some powerful magnet grades may interfere with pacemakers and wipe floppy disks or the magnetic strip on your credit card.

Because of the development of neodymium magnets in the early 1980s, personal audio and electric motors have advanced. Because of their low cost, they may now apply to a wider range of audio items such as headphones.

NIB is the alloy that makes these tiny, powerful magnets (neodymium, iron, and boron). These metal magnets are composed of rare-earth elements and are thus capable of producing powerful magnetic fields.

To complete the magnets, a stronger metal, such as nickel or a robust plastic, is applied to the metals. This reduces their brittleness and provides corrosion and rust protection.

Magnets made with neodymium have many applications. These include their current usage as earbuds, headphones, hospital MRI scanners, aircraft, yachts, vehicles, and speaker systems.

Benefits of Neodymium Magnets in Headphones

Neodymium magnets are often lighter and smaller than other magnets, making them perfect for headphones. You don’t want your headphones to be too heavy, whether you’re wearing them or carrying them.

The magnetic energy per ounce of neodymium magnets is also higher than that of other types of magnets. However, the neodymium magnet headphones have eight times as much clarity and fundamental performance as the ferrite magnet headphones.

Furthermore, neodymium magnets utilize less power while delivering better sensitivity and larger sound production than other magnets. They can make music with a high sound pressure level by applying high magnetic flux to produce the song. Because of this, neodymium magnets enable you to get better headphones at a lower price and greater sound quality.

What are Their Shape, Size, Grade, and Coating Situation?

Here we will discuss the distinctions between neodymium magnet grades.

Everything starts with the letter N, even the names of neodymium magnets. The next figure is more technical since it represents the maximum energy product of the neodymium magnet in Mega-Gauss Oersteds (MGOe). This is the most important factor in determining the strength of a neodymium magnet. The stronger the magnetic field created by the neodymium magnet in a specific application, the higher the total energy product value.

Because lower grades are no longer manufactured, the grades frequently available for purchase range from N30 to N52.

ROBO Magnetic does not compromise on quality, and most of our neodymium magnets are grade N30 to N30EH, making them more magnetic than many grade neodymium magnets. Our Neodymium magnets grade offers high performance at a low price.

Sometimes, one or two letters may be slapped onto the end of a grade. These letters determine the temperature rating and represent the maximum operational temperature the neodymium magnet can withstand before permanently losing its magnetic properties. These numbers should always be used as a guideline since other factors such as size and shape affect a neodymium magnet’s performance at high temperatures. For further information, please see our Neodymium Magnets Grade Page.

Many different materials may be used to coat neodymium magnets, including nickel, copper, zinc, tin, epoxy, silver, and gold, with nickel being the most often used. A multi-layer coating method (e.g., nickel-copper-nickel) is also commonly used to improve corrosion resistance.

How are These Types of Magnets Made?

Process introduction

Step 1: Prepare Materials for the Reaction

This step entails inspecting raw materials used in the production of Neodymium magnets. The samples are examined, cleaned, and ready for alloying. Throughout the alloying process, small quantities of other metals are added to the NdFeB alloy to improve and modify the microstructure of the final product, enhancing its magnetic properties and influencing future treatments.

Step 2: Melting

The chemical mentioned above reaction takes place in a vacuum induction furnace. To keep impurities out of the process, the products are heated by passing electrical eddy currents through them.

Step 3: Milling

Milling reduces the resultant material to a very fine particle-size powder. The typical particle size is around 3 micrometers.

Step 4: Pressing

The powder is compacted to produce a solid with a preferred magnetization direction. The powder is crushed with a die into a solid at temperatures of roughly 725°C in a procedure known as die-upsetting. The solid is then squeezed in a second die to a broader form that is roughly half its initial height. This aligns the preferred magnetization direction parallel to the pressing direction. A fixture that creates a magnetic field while pressing is used to align the particles in particular geometries.

Step 5: Sintering

In powder metallurgy, sintering is a frequent technique. The material is crushed at high temperatures (up to 1080°C) below its melting point until its particles cling to one other.

Step 6: Machining

Grinding is used to form the sintered neodymium magnets to the required shape. Complex forms are manufactured using electric discharge machining less often (EDM). Material losses due to machining are kept to a minimum owing to the high material cost. There has been no successful method of garbage recycling devised.

Step 7: Plating

Individual neodymium magnets have three layers of electroplating: nickel, copper, and nickel. This is important because unplated neodymium magnets are particularly prone to corrosion and lose their magnetic characteristics fast in the presence of moisture.

Step 8: Magnetization & Inspection

The neodymium magnets produced at this point have a “preferred” direction of magnetization, but they are not magnetized. They are put in a fixture that briefly exposes the neodymium magnet to a very high magnetic field. It’s a large wire coil that surrounds the neodymium magnet(s). To generate such a high current in such a short period, the magnetizing apparatus employs banks of capacitors and a massive voltage.

The finished neodymium magnets are examined for some qualities. The dimensions are verified using a digital measuring projector. The plating thickness is verified using x-ray fluorescence coating measuring equipment.

ROBO Magnetic

ROBO Magnetic is one of the world’s top neodymium magnet suppliers, specializing in creating permanent neodymium magnets to client specifications for composition, magnetic properties, forms, and sizes.

ROBO Magnetic provides

  1. A wide variety of services for manufacturing Neodymium Magnets.
  2. A large selection of Neodymium magnetic alloys.
  3. Creates magnetic solutions that may be utilized in various applications.

Why Choose ROBO Magnetic?

For many years, ROBO Magnetic has provided technical assistance to people, corporations, and organizations all across the globe. We endeavor to meet our consumers’ needs by delivering skilled and creative staff members.

  1. A successful track record with over 16 years of experience
  2. A large warehouse has more than 500,000 goods.
  3. A centralized position allows for faster delivery.
  4. Strict quality control
  5. High-quality neodymium magnets with patent protection


Our goal is to provide our customers with the highest quality Neodymium magnets at the lowest possible prices. We are constantly expanding and improving our products and services. At ROBO Magnetic, we strive for:

  1. Customer satisfaction
  2. Complete customer satisfaction
  3. 100% client satisfaction
  4. The highest level of customer service in the industry and dedicated reporting procedures ensure that the same high level of service is maintained or improved for many years to come.
  5. Delivery within a week of order in most cases

Don’t hesitate to get in touch with us for all inquiries. Or contact us by clicking the ” Contact Us ” button on the top of this page. Thank you for visiting our website!


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ROBO Magnetic Product Team

We are the manufacturer with 16 years of experience in custom neodymium magnets.

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