Low frequency and high frequency brilliance test KEF M200 in-ear headphones

Last year was the 50th anniversary of KEF. In order to commemorate the achievements of the half century, the original factory launched the commemorative LS50 bookshelf speakers, and then aimed at the Multimedia field to launch the X300A active speakers. These two products are attracted to the major audio exhibitions. A lot of eyes, and this year, there are new works, this time is for the M series earphone products for personal listening - M500 earmuffs, M200 ear canal, KEF uses a large number of aluminum alloy materials to create a unique product style, just got the process design The grand prize reddot design award red dot design award, the international factory really has two brushes.

For example, the M200 ear canal earphones of this audition, the earphone shell is mainly made of matte aluminum alloy. If the black soft earloop is straightened, the appearance is a bit like an eighth note, and the overall shape is smooth and looks like a comparison. Neutral, female users are also very suitable. Although the headphone body is somewhat large, it is made of aluminum alloy, so the quality is very light, only 26 grams, and the strength of the aluminum alloy is high enough to produce resonance that can be heard by the human ear.

The earphone is like a speaker that shrinks and shrinks. However, the earphone does not have a large box like a speaker. The designer must place the single in a very limited space. Therefore, most of the dynamic headphones use a single cell. To be responsible for the full frequency band. However, the most important feature of the M200 is the use of a double-acting single-unit design. Does it require a lot of space to plug two monomers? That's right, I think this is why the M200 looks bigger than the average headset, but it's not too big to pretend. This is because the original factory has designed the ingenuity, which is called DDD (Dual Dynamic Driver) dual power. The single-array array consists of a 10mm single unit responsible for low frequency, a 5.5mm single unit for medium and high frequency, two monomers one after the other, the bass is behind, and the middle and high notes are in front. In order to make the low frequency more full, the original factory deliberately kept the LF Chamber between the two cells, giving the low frequency extension space, and then designing the channel in the front aluminum alloy casing, so that the low frequency can be smoothly transmitted, no Will be blocked by the front mid-highs.

Looking down, the headphone body is made of a tough black rubber material, which is thick and difficult to entangle, but the microphone effect can't be avoided. When you touch the headphone body, there will be a buzzing sound, but it is not too serious. . The right side of the line has an aluminum casing wire control device. The original factory said that all smart mobile devices are available, so you don't have to worry about which system's mobile phone you are using.

Although the M200 is an ear canal earphone, in order to improve the wearing stability, the outer arm of the earphone has a fixed arm of the earphone. The fixed arm is made of soft rubber material and can be bent at a large angle, so the adjustment space is large. Suitable for a variety of different ear types of users. For wearing comfort, the M200 uses ultra-thin resin to make the earplugs. The softness is high to help improve the wearing comfort. However, due to the large size of the M200, when it is actually worn, the tragus and the tragus are used. The two pieces of cartilage will be slightly extended by the body of the earphone. It may be a little uncomfortable to use it for a long time. It takes time to get used to it. Another noteworthy thing is that the original factory indicated that the M200 has a sound insulation capacity of 30dB. This data is even higher than the UE headphones that are dedicated to the stage. Otherwise, the user must first select the appropriate earbud size (large , medium and small), and the correct way to wear, it is possible to achieve good sound insulation, how to wear it is correct?

I remember when I first listened to the M200, I felt that the sound was very thin and stuffy, and there was no detail. The sound insulation effect was not as good as the original one. Even if I changed the earplugs of other sizes, I couldn’t see any improvement. When I was wondering, I suddenly found the original. The factory produced a demonstration film. It turns out that the M200 can't just plug the headphones into the ear like a normal ear canal earphone! Because the earphone body is bigger than the ordinary earphone, when wearing it, it should be like the ear temperature of the little baby. First, gently pull the ear back, so that the earplug can penetrate into the ear canal. After releasing the ear, the earplug will be Closely attached to the ear canal. Not only the sound insulation effect is good, but the sound is also fuller and more delicate, and the gap is very big!

Especially for low-frequency performance, the M200 exhibits a fast low-frequency impact. The momentum is full and not excessive. There is no such rumbling sound, and the mid-high frequency details are not affected at all. The refreshing rhythm is very suitable for listening to popular music. For example, I used the iPhone 5 to directly drive the M200 and played the Korean music group CNBLUE's "Re:Blue" EP album. At the beginning of the first track "I'm Sorry", the faint rainy background sounds were quite clear, representing the M200. Good detail control, and good sound insulation. When the same track is listening on the MRT, you can clearly hear these subtle sound effects. After a series of low frequency rhythms, the M200 shows the fast and full low frequency particles, but Will not close too tightly. When there is a low-frequency sense, the M200 will not be disappointing. For example, another Linkin Park's "Reanimation" album, the fifth track "Frgt/10", the endless low-frequency sound, listening to the M200, not only the low-frequency details Rich, the momentum is also very full, 10mm bass monomer is really good!

The thickness of the M200 is moderate but it does not appear excessively thick. The vocal resolution is very good and not dry, it sounds very smooth, such as Eason Chan's "?" album, the sixth track "Baby Song". His voice sounded close to the M200 but there was no pressure. The slight lip-tooth and ventilating sounds were not missed. The whole song was only composed of pure piano notes, and the music background was very dark and clean. It is easy to pay attention. Focusing on vocal singing, it seems that Eason Chan whispered his father's voice softly in his ear, which is simple and moving.

Finally, Zhang Sara's "Bruch, Brahms Violin Concerto" album, from the first track "Bruch Violin Concerto No. 1 G minor 1st movement" begins with the sound of timpani and wood tube warm, Soon after, Zhang Shala's violin came in. The string sound was delicate and melodious and full of gorgeous luster. The subtle sound of bowstring friction was clearly distinguishable and the resolution was excellent. In the first half, the whole orchestra was steadily laid out behind. The low-frequency plucking of the cello and the bass harps naturally extended, highlighting the violinous performance of the violin. The second half of the orchestra played more and more powerful. When the whole orchestra began to play together, The scene remained stable and not chaotic, and the sound field was naturally loose. When encountering a large-scale, large-dynamic repertoire, the M200 was still calm and relaxed, and there was no feeling of being stretched.

As the first ear canal earphone of KEF, the performance of the M200 is indeed remarkable. Not only the low frequency is refreshing, but also the high frequency is dazzling. Although the intermediate frequency is not particularly warm and rich, the resolution is very good, and it is loose. The sound field and layering, coupled with the beautiful aluminum matte shell, are really beautiful inside and outside! Don't end up reminding the user, if you want to really experience the beautiful sound quality of the M200, please be familiar with the correct way to wear it, but don't miss it in vain!

Type: ear canal headphones

Monomer: 10mm bass × 1, 5.5mm mid-high sound × 1

Frequency response: 20Hz~20kHz

Efficiency: 94dB ± 4dB

Impedance: 12 ohms ± 10%

Terminal: 3.5mm

Sound insulation effect: 30dB

Headphone cable length: 1.2m

Weight: 26g