I remember in a previous episode, when I shared SoundMAGIC earphones and said they were an underestimated domestic HiFi headphone expert, many people agreed.

Because if you have some understanding, you would know that Shengmei once thrived in the North American market, making many domestic HiFi earphones envious. In addition, it was also a domestic OEM factory of Baiya.

Will you find it incredible if one day I tell you that Shengmei's headphones can resonate with KEF's sound system?

After all, we often say that a pair of headphones has a box like feel, mostly because they have characteristics such as loose and surging low frequencies, as well as relaxed and transparent sound.

However, KEF speakers are not limited to traditional HiFi boxes, and the same goes for the E90C from Ear Sound.

If you learn about it, you will definitely feel that Shengmei is really underestimated!

▲ Perhaps it is because its main market has always been in North America, and the packaging is mostly in English, especially with no Chinese on the front.

It is said that this is a limited edition of Shengmei, but there is no relevant introduction on the purchase page. In short, for Shengmei, which does not have a strong presence in China, domestic users have little opinion on its limited or unlimited quantity.

▲ Message display on the back of the packaging, there is Chinese here, pay attention to its unit, "8mm coaxial coil iron double unit". Those who understand KEF audio must know that KEF's martial arts are coaxial and coaxial units. Although there are obvious differences in the coaxial coil iron of the Harmony Beauty E90C, there are also similarities, especially in terms of sound, which will be explained in detail below.

▲ Storage box and accessory display, the storage box is very solid, so there is no lining, it is directly placed in the packaging box. In terms of accessories, in addition to a 2.5 balanced cable, there is also a 3.5 audio cable with a microphone, and a split adapter cable for PC gaming.

There are three types of earplug covers, in addition to the regular silicone and sponge covers, there is also a pair of double section covers. Pay attention to this double section cover, it is effective!

▲ The inner lining of the storage box is displayed, and all accessories are also hidden under the inner lining. Because of this storage box, all accessories can be packed and taken away.

▲ E90C cavity display, metal shell, but the mold is quite special, it extends a metal piece on the circular rear cavity for wiring.

▲ The display on the inside of the cavity, although the mold is quite special, the overall size is very small, so small that no one may find it too big. The stability and comfort of wearing are completely guaranteed.

▲ Display of cavity details, with decent workmanship and no visible flaws to the naked eye. The nozzle is a bit short, which may make some people feel that it is not tight enough when wearing it. The consequence of not filling the ear canal is that the low-frequency sensation is somewhat affected. If this is the case, its double joint sleeve can be used.

▲ Display of cavity details, with decent workmanship and no visible flaws to the naked eye. The nozzle is a bit short, which may make some people feel that it is not tight enough when wearing it. The consequence of not filling the ear canal is that the low-frequency sensation is somewhat affected. If this is the case, its double joint sleeve can be used.

▲ Wire display, official purchase page information shows that both wires are single crystal copper plated silver wires, but the 3.5-head wire is a bit stretched and the surface TPU material is prone to stethoscope effect. The 2.5-head wire is okay, the main wire is not thick, the texture is soft, there is no elasticity, the storage index is extremely high, and it is also very comfortable to wear.

▲ According to international cases, before sharing personal subjective listening experience, let's briefly explain its units and core parameters. There's really nothing to say about the parameters. With a 29 Ω impedance and 100dB sensitivity, even if the phone is pushed directly, there shouldn't be any problem. Otherwise, it wouldn't be equipped with a 3.5mm cable with a microphone.

In terms of units, the use of coaxial unit architecture in headphones is not particularly novel. For example, DaYinKe has dual coil coaxial technology, and even includes a patented coil iron dual unit coaxial technology for sound width. However, they share a common feature of being more inclined towards the lower end and having very strong low frequencies.

That's why the Shengmei E90C looks like a KEF? Because it is similar to KEF's box, in terms of overall style, there are relatively few low frequencies, while the mid frequencies have very beautiful resolution, and the overall style is relatively light.

However, there is not much information about the circle iron coaxial on the purchase page of E90C, so we won't bother discussing this topic here.

▲ Let's first talk about the intermediate frequency of E90C. The benefits of coaxial transmission bring significant differences in resolution compared to current high resolution. The sound of E90C is clear and moist, with pure sound, clear and solid structure, and strong penetration. Its vocal position is not at the front, but the layering between the vocal and background music is distinct. Secondly, although there is no sign of richness or looseness in its thickness, it has a slight diffuse feeling like a box, especially when testing Cai Qin's songs, the soothing and looseness is purely natural.

Even when listening to the rich and mellow male voice of Li Zongsheng, the E90C does not show the richness of the lower body, nor does it have the sharpness of high resolution. In addition, there are signs of coldness in the cold and warm trends, and its beautiful resolution really has the visual feeling of listening to KEF bookshelf boxes.

So in terms of the choice of male and female voices, the E90C is theoretically more suitable for female voices. Whether it's the deep voice of Cai Qin, the obvious dental sound of Karen Mok, or the warm voice of Fish Leong, it all captivates people. Although the analysis is sharp, the dental sound is not obvious, and it is indeed very toxic to the ear.

However, I also enjoy listening to male voices using it. Whether it's the less heavy male voices like Leslie Cheung, Jay Chou, or Qi Qin, but the lower frequencies like Zhao Peng, Luo Dayou, and Li Zongsheng, the low tones are dyed, the high tones are delicate, and at the same time, they are transparent yet moist.

▲ The high frequency of the E90C is clear, bright, and even somewhat magnificent. The crisp and clean strings of the violin are very pleasant to listen to, and the vivid overtones are impressive.

Overall, it has a good extension and is very smooth. The sound field is open and organized, and the instrumental separation is high, including the ease of dynamic performance. It is natural for it to be competent in large-scale performance.

Due to the outstanding performance of the E90C in the mid to high frequency range, coupled with its slightly upward performance, it is easy to feel that its low frequency is incomplete. In fact, its diving is still very deep, and the drumming has a powerful and surging force, with a considerable overall sense of volume.

However, due to its clean analysis, there is almost no atmosphere overall, and its low frequency is not heavy (theoretically more in line with the balance of three frequencies). At first listen, it may not feel very stimulating, especially when using ordinary earplug covers, which may cause a lack of volume due to the short insertion of the nozzle into the ear. Therefore, the double joint cover included in its accessories is very important.

▲ Overall summary section

Although I shared my subjective listening experience with the higher frequencies, objectively speaking, the three frequencies are relatively balanced.

And compared to the mesmerizing vocals, another easily overlooked sound characteristic of it is its center or precision. Although it has been manufactured for Baiya, its vocals, including high frequencies, are not so straightforward, and the transparency and musicality are natural.

In terms of sound, I personally think the E90C has no flaws, it just depends on whether you like it or not.

In terms of the design of the headphones themselves, apart from the suspicion of charging with a 3.5 cable, the main cable being set to 2.5 instead of 4.4 is somewhat out of line with mainstream consumer trends.

But considering the price of the 599, I still think that both the E90C and the Sound Beauty itself are undervalued, and they are the kind that are somewhat underestimated.