The Benefits of a Planar Magnetic Driver

Planar magnetic driver is an audio technology that is found in some of the most premium headphones and IEMs. It offers many advantages that distinguish it from other dynamic or balanced armature driver types.

However the planar driver has some disadvantages to note. They are more expensive and require an amplifier to be driven.

Ultra-thin diaphragms

Every sound we hear, from the loudest crash of a cymbal to the tiniest creak of piano bench, is portrayed by a complex turbulent pressure wave. The driver of a top headphone has to reproduce these waves accurately without missing any details or distorting the audio. This requires a light diaphragm with a thin, smooth surface that can respond quickly and swiftly to a variety of frequencies.

While dynamic drivers are powered by a voice coil bonded to a conical diaphragm planar magnetic drivers have a flat diaphragm sprayed with an conductive film that is floating between fixed magnets. This allows them to create a uniform field of magnetism across the entire diaphragm, reducing distortion.

However, this approach poses additional challenges, such as the potential for membrane resonance problems and airflow turbulence inside the grid-like magnet planar arrays. These issues could lead to the frequency of mechanical resonance in the diaphragm that is several times greater than the input frequency, which reduces the sensitivity of a voice pressure sensor.

With a patent-pending technology known as "Spherical Acoustic Structure" (SAS), Final was able to overcome these limitations with the D8000 by using a single piece of material that functions as a diaphragm as well as conductor. This solution was built on ribbon speakers that have their spherical conducting, but it was more affordable for headphones because of its dimensions and power requirements.

Another challenge common to many planar magnetic designs is a ringing sound that occurs on high-frequency, low-frequency bass notes. This is caused by a mismatch between force of the magnetic field applied to the diaphragm as well as the natural flexing characteristics of the diaphragm itself.

Final employed a thin polymer film dubbed Parylene to address this issue. The material was selected due to its superior mechanical strength, bending ability as well as its uniform thickness and thickness consistency. These traits were necessary to ensure that the thin, stiff film could be stretched without forming undesirable wrinkles or creases.

Superior transient response

The method by which planar magnetic drivers produce sound waves is different from traditional dynamic drivers. The primary difference is that in a planar magnetic driver, the conductor is laid out on the diaphragm in an 2D flat pattern instead of a coil centered around a cone shaped diaphragm. This allows the conductor to respond to magnetic fields on both sides of the diaphragm, and listening produce sound waves with high accuracy. This technology eliminates the necessity for voice coils which can alter their impedance depending on frequency, which results in distortion-free music.

In addition that, planar magnetic drivers are more durable and lighter than conventional drivers due to the fact that they don't contain moving parts that wear out over time. They are also less susceptible than conventional drivers to harmonic distortion which can degrade the audio quality. They also have a quicker response time and are able to reproduce transient sounds at a higher speed.

The vast surface area of the planar diaphragm, however, requires more power in order to move it and create sound waves. As a result, these headphones require an amplifier to drive them at adequate levels. Some listeners may not be interested in the extra weight and expense.

Planar magnetic planar headphones drivers also provide larger soundstages than dynamic headphones, making them more spacious. This is because a large, flat diaphragm creates an asymmetrical wavefront instead of the spherical wavefront that is focused typical of dynamic drivers. This is a key feature of planar headphones that provide more of an immersive listening experience.

Audio reproduction that is natural and accurate

Planar magnetic drivers deliver authentic and accurate audio reproduction as contrasted to traditional dynamic driver models. Planar magnetic drivers produce equal magnetic forces by using two rows of magnets unlike traditional dynamic drivers that feature a cone-shaped membrane that is vibrating. The diaphragm moves in a wave-like motion. This helps to avoid distortion. They can also reproduce music in greater frequency ranges including the lowest lows up to the highest highs. This makes them an excellent option for sound professionals as well as music enthusiasts.

The thin, flexible diaphragm in a planar magnet driver moves more quickly than dynamic drivers. This allows it to respond to changes in sound signals and provide accurate reproduction. The absence of a coil in the diaphragm is also a deterrent to the chance that mechanical components will come into contact with each and cause distortions at higher volume.

This means that the diaphragm can effortlessly displace huge amounts of air to reproduce bass frequencies. The size of the diaphragm and its flexibility are essential in generating the rich bass that you hear in your music. Dynamic drivers are typically small and stiff. This means they are not able to handle the speedy excursions required to reproduce bass.

Despite their advantages however, planar magnetic drivers aren't used as often in headphone or IEM products due to their high price and the complexity of their design. This is partly because they require amplifiers to drive them, which hinders their portability and ease of use. They are popular with music lovers and critics who appreciate their exceptional audio quality and exceptional performance.

Wide frequency response

Planar magnetic headphones employ diaphragms that are flat and uniform to produce sound in a steady and controlled manner. This produces a wide frequency response, which allows for a precise and accurate reproduction of music. They are also referred to as having a superior transient response. This means they can respond quickly and precisely to audio signals.

They do this by employing a planar array consisting of conductors arranged across a thin diaphragm sandwiched in between two magnets. When an electrical signal is sent to this conductor array it transforms into electromagnetic energy and interacts with the diaphragm's magnetic fields, which causes the push/pull motion mentioned earlier. This allows the diaphragm to react quickly to audio signals, resulting in high-quality music reproduction with exceptional clarity and precision.

Another reason that makes these drivers so popular among audiophiles is their low distortion rate. Because they don't have the same moving parts as other types of headphones which means they don't produce as much harmonic distortion. Additionally, they have lower impedances than their counterparts, and offer an unresistive load to amplifiers, which makes them more efficient to drive with the power they require.

Planar magnetic drivers are utilized in high-end audio equipment because of their superior performance. This can make them more expensive and require an amplifier and are therefore not suitable for a 'grab-and-go' driver. Nevertheless audiophiles will trade that extra expense and effort in exchange for the superior quality these headphones offer. They are the best option for those who wish to have a fantastic listening experience.

Low distortion

The diaphragm of a planar magnet driver is thin, so it can move at high speed without losing control. This gives a great transient response which means that the driver will respond to sudden changes in audio signals very quickly and precisely. This allows you to hear details in music and make them sound more natural and realistic.

Planar magnetic drivers also have the benefit of producing an even driving force across the diaphragm, which prevents distortions when the volume is increased. This is one of the primary reasons why headphones with planar magnetics sound so good. Dynamic drivers have thicker and more heavy diaphragms, which are not capable of moving as quickly or at the same speed. They can even break when forces are too strong or exceed their structural integrity limits, causing the diaphragms to go out of the sync.

On the other hand the planar magnetic drivers generate a very strong electromagnetic force that directly reaches the diaphragm. This eliminates the need for a voice coil that is commonly required in headphones that employ traditional cone drivers that are dynamic. This allows for greater dynamics, a larger soundstage, and a superior bass response.

Due to these benefits, planar magnet drivers are considered by many audiophiles to be the best headphone driver. They do have some considerations regarding the cost and power requirements, however their ability to provide excellent audio quality is a great choice for those seeking the best quality audio reproduction. They offer exceptional clarity and detail in all frequencies, with the exception of low bass. Dynamic drivers are still preferred. If you are seeking a pair that will deliver great sound for any price, then be sure to take a look at our top picks!