Unique Melody (UM) has the courage to experiment and innovate style, which has repeatedly brought surprises to enthusiasts. Following the unprecedented success of 3DT HK Special+ in Hong Kong, UM decided to bring more advanced enjoyment to Hong Kong users, launching the first pair of flagship headphones on the market that use a "bone conduction unit", which is named HK Special+ edition; Outside, it is fully sublimated.
This time, UM used anti-EMI carbon fiber material on MEST HK Special+. The finished product has the ability to resist shear and puncture, and has the characteristics of rigidity, lightness, and EMI resistance of traditional carbon fiber. The carbon fiber texture arrangement is changeable, so that MEST can have different visual effects under different angles of light refraction, full of three-dimensional feeling.
In addition to appearance considerations, the bone conduction unit used in MEST also relies on the shell to transmit vibration; the hardness and tightness of the material are just the sound transmission channel of the bone conduction unit.
Due to the increased hardness of the carbon fiber shell, the cavity of MEST is thinner than that of 3DT, and the shape is smaller. The same ergonomic design is used, and the wearing feel is more comfortable.
Looking at the earphones with different unit configurations in the market, in addition to pursuing more diversified unit combinations, they also have trendy structures and even break the limit on the number of units. Many brands are in the direction of integrating different unit sounds or characteristics. , Are facing many problems and challenges. Here, UM has successfully combined the respective advantages of the four units by virtue of years of research and attempts on the headphone unit, and adjusted a mature and highly integrated sound on MEST, showing UM's distinctive technical capabilities.
There are various forms and sizes of bone conduction units on the market, and more manufacturers use them in the direction of full-frequency output. The actual results also reflect that these units have advantages in sound quality performance, which drives UM to apply this technology. After some attempts by the factory, they used a set of small, lightweight, and suitable multi-layer piezoelectric ceramic bone conduction units; the factory fixed the unit with a 3D printed cavity on the panel, away from other acoustic components , When the signal is input, the ceramic film drives the inner metal vibrating plate to bend, generating slight vibration and sound.
The bone conduction unit does not need a sound guide tube, is not sensitive to airflow, and the sound can be transmitted anywhere in the cavity, completely avoiding high-frequency noise interference, and the sound distortion is extremely low. UM allows the unit to work only at mid-to-high frequencies. One is to assist the transition of mid- to high-range units. The other is because of the operating mode of the bone conduction unit, which makes its fast state and imaging ability very good, and its advantages are more obvious in mid-to-high frequencies.
In addition, UM uses a pair of SONION electrostatic units for super high-frequency output. The electrostatic unit has always had its own unique way of expressing the mid-to-high overtone performance. The tone is smooth and full of air. It will not have the harshness and pressure of the high frequency of the moving iron unit, and it can easily show the gorgeous and detailed tone. On the MEST, the bone conduction unit has improved the density of the mid- and high-frequency bands, making the performance of the earphones not only full of hall, but can also fully express the gloss and vibration of the sound, creating a three-dimensional and deep music space.
The 10mm moving coil used by MEST has strong potential and flexibility, and a moderate sense of volume. It rushes to the user like a tide, creating a natural and deep atmosphere, making it easier for the user to indulge in the music.
UM also understands the importance of airflow to the iron earphones, so it uses the classic double pore structure on the HK Speical+ edition. One is used as the air return port of the moving coil unit; the other is a newly added pressure relief valve, which is connected to a sound guide tube with a metal pipe to discharge excess air, balance the air pressure in the ear canal, and enable sound transmission Smoother and improve wearing feeling.
In addition, the HK Special+ edition uses a titanium sound tube and a metal dust screen design to ensure the quality of sound transmission, and it is also convenient for users to clean the headphones.
MEST comes with a leather earphone bag produced by the Korean brand Dignis, using four different tonal blue leather materials, noble and elegant; there are adjustable intervals inside, both appearance and protection. The package also comes with a 2-pin 3.5mm copper-plated silver earphone cable, three different sizes of ear gels (S, M, L) and wipes.
Unique Melody MEST specifications:
Number of units: 8 units
Unit combination: piezoelectric ceramic bone conduction unit x1 + electrostatic unit x2 + moving iron unit x4 + 10mm moving coil
Frequency response: 20Hz~55KHz