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Adoption of Micro Square PM driver "Planar" and customized BA driver "Summba"

Micro Square Planar Magnetic is, in principle, a driver that uses planar dynamic technology. A flat coil is bonded to a diaphragm made of a highly rigid composite material that combines a membrane-shaped lightweight metal alloy and super engineering plastic inside a metal box made of highly processed thin plates, and a powerful magnet generates vibrations. Drive the board. This driver has a unique tone that uses a highly rigid composite material diaphragm to produce a tight and clear sound, while the coil directly drives the diaphragm to produce a dynamic, powerful tone. This time, we used three types of customized drivers for the low range, mid-low range, and high range.  

In addition, in order to bring out the tones of the Micro PM driver even more, we adopted a second-order crossover network using AVX's high-capacity capacitors, and a customized BA called Summba. The combination of three types of Micro PM drivers creates multiple tones in the mid-low range, while the use of a customized BA allows you to create Micro PM tones while adjusting the balance between the appropriate wetness and clearness of the sound. It made it stand out.  

Housing architecture "MIAA" and highly precisely managed schematic design

We have developed a unique housing architecture, "MIAA: MADOO In-ear Acoustic Architecture," to increase reliability and maximize performance. All products will be developed based on this architecture.  

We named the component that holds the driver together an acoustic box. This acoustic box is manufactured using a 3D printing process and has a complex acoustic circuit called Schematic Design. Many multi-driver earphones on the market use vinyl tube sound tubes. However, vinyl tubes have various issues such as the material itself being soft, the loss of sound due to crushing due to curvature, and the lack of reproducibility of characteristics due to unstable manufacturing even with the best design. . In other words, these earphones have individual differences, and the user depends on the fate of the earphones, just like a musical instrument. As a means to solve these problems, we developed the housing architecture "MIAA" to solve these problems. Each driver is firmly fixed in a precise position and guided by an acoustically engineered sound tube. Sound tubes designed using Schematic Design are acoustically optimized with hole diameter, length, filter function, and bore function. This allows you to deliver great sound. In addition, 3D printed parts are controlled and printed at the 0.01mm level, resulting in very precise parts. This strictly controls quality, reduces individual differences during manufacturing, and allows users to enjoy the sound quality as designed.  

Combines beauty and functionalitysapphire crystal

MADOO's design concept is inspired by submarines and clock windows. This is because the concept is to create earphones that can be used for many years. We searched for a suitable material for windows and came across sapphire crystal.  

Sapphire crystal has a Mohs hardness of 9, making it extremely scratch resistant and highly heat resistant. Given the concept of earphones that will be used for many years, we thought that the optimal material would be heat and corrosion resistance that cannot be obtained with glass or plastic materials. In addition, in terms of functionality, the structure is designed to bring out the performance of the speaker unit group by controlling the back pressure of the speaker unit group using air gaps. Sapphire crystal is more transparent and more beautiful than glass or plastic, and is a material used in high-end watches. This sapphire crystal is manufactured in Japan by Adamant Namiki Precision Jewelry, which produces luxury watch parts and high-end audio accessories.  

High rigid housing

Housing rigidity is necessary to maximize the potential of the driver unit. The housing was designed by an engineer who is familiar with metal processing and has worked on cutting tools for Swiss and Japanese luxury watches and German automobiles. The housing is manufactured by cutting out the SUS block using high-precision CNC machining.

MADOO has a design philosophy that the rigidity of the housing affects the sound quality. For this reason, we applied finishes that do not compromise on sound quality, such as sandblasting the housing surface to give it hardness and designing the shell to be thicker than standard earphones.  

Optimized shape derived from ear impressions of 300 people

Western and European ears are considered to be the base design according to international standards, but they are very large compared to Asian ears, which often causes problems with fitting.In addition, the main market for high-end earphones is Asia, centered on Japan, Hong Kong, China, and South Korea. We focused on this and collected ear molds of 300 men from these regions over a period of about three years, and based on this we derived the optimal shape. As a result, we have created a housing that combines high-quality fit and design.

Custom cable by Acoustune

The earphone cable uses a 2-core 4-core cable made of silver-coated copper wire by Acoustune Custom, a brother brand. The cable reduces sound quality loss and ensures the performance of the earphones. The connector section uses the new IEM connector "Pentaconn Ear" designed and produced by Nippon Dicks Co., Ltd., which boasts high sound quality and high reliability. Compared to traditional MMCX connectors, the plug and socket parts are in closer contact, providing superior conduction performance. It also achieves both ease of attachment and detachment and robustness. This product comes with two cables as standard: "MRC011" with a 3.5mm 3-pole L-shaped gold-plated plug and "MRC023" with a 4.4mm 5-pole L-shaped gold-plated plug.


product name


housing material

maximum input


Frequency characteristic


Cable (2 types)

weight(Including cable)


​Warranty period


Micro Planar Driver x3 +Balanced Armature Driver x2

Stainless steel + Sapphire crystal




Pentaconn Ear

[Name]: MRC011 / Pentaconn Ear 3.5mm 3-pole plug
4-core silver-plated copper wire cable (4-core structure, transparent sheath), cable length approximately 1.2m

[Name]: MRC023 / Pentaconn Ear 4.4 mm 5-pole plug
4-core silver-plated copper wire cable (4-core structure, opaque black sheath: Japanese resin), cable length approximately 1.2 m


Silicone ear tips (S/M/L), foam tips (free size)​, ear tip case, carrying case

​Main unit: 1 year / Cables and accessories: 90 days

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