How a Planar Magnetic Diaphragm Headphone Driver Works
Traditionally, dynamic drivers have a voice coil that is connected to the center of the conical diaphragm. When electrical signals pass through a voice coil, the diaphragm shifts.
The force is applied to a small part of the diaphragm, and it's hard to move different points at the same time. This leads to breakup modes that can cause distortion.
Audio with a Detailed Sound
Many audiophiles want clear and precise sound through their headphones. One method to achieve this is by using a planar magnetic diaphragm. This type of headphone operates in a similar manner to dynamic cone drivers but with more modern technology.
A planar diaphragm has an elongated structure that is integrated into the headphone's frame. It's constructed from a thin, lightweight film-like material. It's designed to be as flat and uniform as it is possible. This enables an even distribution of pressure across the entire surface.
The flat shape of a planar diaphragm magnetic diaphragm allows for a more controlled soundstage. A more precise wavefront results in better sound staging which helps you identify the exact location of an vocal or instrument on the track. This is an advantage over the more spherical waves that are typical of dynamic drivers.
A planar diaphragm is different from traditional dynamic drivers which use a voice-coil attached to the cone's center made of paper or plastic. Instead, it utilizes series magnets that are placed on either side of its flat surface. The electrical current passing through the voice coil interacts with these magnets, causing the diaphragm to vibrate and produce sound. The entire diaphragm can be controlled simultaneously. This eliminates breakup modes, mechanical filters, transmission delays, and local resonances that could have a negative impact on the quality of sound.
A flat and uniform diaphragm can also accelerate more quickly than the larger and more heavy ones used in dynamic drivers. According to the laws of physics, force is proportional mass and acceleration. This means that the more quickly a driver's diaphragm moves the more force they exert. This results in planar magnetic drivers more precise bass response and greater detail retrieval.
Of course, the benefits of a planar magnetic driver don't come without cost. They cost more than dynamic drivers because they have a large diaphragm and a complex motor. They also require a stronger amplifier to function properly. Many manufacturers of planar magnetic headphones benefit from their technology to create premium headphones at competitive prices. Audeze LCD-4, HiFiMAN Susvara are a few examples.
High Sensitivity
The planar driver differs from the moving coil drivers found in the majority of headphones and IEMs, in that it uses a flat diaphragm instead of a dome or cone-shaped membrane. As an electrical signal passes through it, it interacts with magnets on both sides of the diaphragm. It creates sound waves by vibrating the diaphragm. The flat nature of the diaphragm enables it to react very quickly to sound and can produce a wide range of frequencies, ranging from bass to highs.
Planar magnetic headphones are more sensitive than other headphone drivers, which can utilize diaphragms that are several time larger than a standard planar design. This creates an incredible amount of dynamic range and clarity, allowing you to hear every tiniest detail that music has to offer.
Planar magnetic drivers also produce a very consistent driving force that is evenly distributed throughout the diaphragm. This prevents breakup and produces a smooth, distortion-free sound. This is particularly important for high-frequency sound, where breakups can be noticeable and distracting. In the FT5 this is accomplished through the use of a sophisticated material called polyimide. It is both ultra-light and extremely robust, as well as a sophisticated conductor pattern that eliminates the inductance associated intermodulation distortion.
OPPO's planar magnet drivers also offer a superior phase coherence. This means that when an audio wavefront strikes our ear, it is flat and unaltered. Dynamic drivers, on the other hand, have a spherical wavefront, which disrupts the coherence, resulting in poor signal peak reconstructions particularly at high frequencies. OPPO headphones sound extremely real and natural.
Wide Frequency Response
Planar magnetic diaphragms are able to reproduce sounds at much higher frequencies than traditional dynamic drivers. This is due to their thin and lightweight diaphragm moves very precisely. They can provide an excellent transient response. This makes them an ideal option for audiophiles searching for speakers and headphones capable of reproducing the most exquisite details of music.
The flat structure also allows them to have a more even soundstage than headphones with coiled dynamic drivers. They are also less prone to leakage - sound that escapes from headphone cups into the surrounding environment. In some cases this is a concern because it can distract listeners and alter their focus when listening to music. In other situations it can be beneficial as it allows listeners to enjoy music in public spaces without having to worry about disturbing others nearby.
Instead of using a coil that is placed behind a cone-shaped diaphragm, planar magnetic headphones feature conductors arranged on the thin film of the diaphragm. The conductor is hung between two magnets. When an electrical signal is applied, it transforms into electromagnetic energy and makes the magnetic forces on each side of the diaphragm to interact with each other. This is what causes the diaphragm to vibrate, resulting in an audio wave.
The low distortion is due to the uniform movement of the lightweight, thin diaphragm and the fact that the force is evenly distributed across its surface. This is a significant improvement over traditional dynamic drivers that are known for causing distortion when you are listening.
Some premium headphones still employ the old-fashioned moving coil design, however the majority of HiFi audio enthusiasts are now using a technology that was long forgotten and the latest generation of fantastic sounding planar magnetic headphones. Certain models require a top-of-the-line amplifier to provide power. However, for those who are able to afford it, they can provide an experience unlike any other headphone. They offer a rich, detailed sound that is free of the distortion that is common in other headphone models.
Minimal Inertia
Because of their construction the diaphragms of planar diaphragms move faster and are lighter than conventional drivers. They can reproduce audio signals with greater precision and can be tuned to a larger range. They also provide more natural sound and have less distortion than traditional dynamic speakers.
The dual rows in a planar magnet driver create equal and uniform magnetic force across the entire diaphragm surface. This will eliminate any unnecessary and unwanted distortion. The lightweight diaphragm can be controlled better because the force is evenly distributed. This permits the diaphragm to move with a precise pistonic movement.
Planar magnetic drivers are capable of achieving very high levels of performance while carrying the smallest weight, making them ideal for portable headphones. Additionally, they can be produced to have a wide range of frequencies, from deep bass to high-frequency sounds. The wide frequency response and accurate sound reproduction make them a favourite for audio professionals.
Planar magnetic drivers are different from dynamic drivers which use coils to push the diaphragm. They don't contain any mechanical parts which can cause distortion. This is due to the fact that the flat array is placed directly on the diaphragm's surface rather than being in the form of a coil that is behind.
A planar magnetic driver, however can drive a light and thin diaphragm using a powerful magnetic force with no energy loss. driver planar , thin, light membrane is driven by a magnetic field that exerts a constant pressure. This stops it from deforming or causing distortion.
The moment of inertia is a crucial property that describes the object's resistance to rotation. The formula I = mr2 could be used to calculate it. An object's shape affects its minimum moment of inertia, with thinner and longer objects have lower moments of inertia compared to larger and thicker ones.