Foreword ---- As a headset industry, I think about the Bluetooth headset:
In recent years, with the technological improvement of the supply chain, the headset industry has used two or three hundred megaphones for hundreds of thousands of Bluetooth headsets. This is not an industry insider, because the price of the unit is essentially linked to the quality, but it is also because Bluetooth bottlenecks Many manufacturers are reluctant to use good speaker units.
The sound quality of Bluetooth products is generally more mainstream than this. This is a matter of mainstream consciousness. Choose a simple and stable raw material supply chain and rely entirely on styling design and marketing packaging to generate a premium. Its common mainstream tuning is through the adjustment of DSP to sound. It is also the practice of most Bluetooth headset brands at home and abroad.
The bottleneck of most Bluetooth headsets is that the bandwidth and headphone circuit design experience is quite demanding. Only a few HIFI brands will achieve a more sophisticated tuning design from the acoustic structure to the speaker and the circuit compensation DSP. This requires a lot of experience. Design team and supply chain as support and time-consuming.
This is the reason why Bluetooth sound quality tuning is in a very awkward situation. The mainstream design ideas of acoustic structure tuning may or may not be included. It is purely part of DSP compensation. Most bluetooth headset sounds are boring, disorganized, harsh, and layered. Vocals and low frequencies are even like a bowl of sparse cheesy sesame paste. Even at home and abroad, some large and small brands of Bluetooth headsets have bottom noise, pop noise, partial sound, Caton, signal instability and other minor issues easily overlooked.
At present, the most popular foreign brand BETAs wireless2, this thousand-level flagship product in the sound quality is also not too much stress, compared to JBL's reflect bt in the headset industry's praise and reputation are pretty good or even far better The former, which is also a high degree of difference between the professional brand and consumer tide brand product design.
According to the author's information from the industry, Meizu's new EP51 and JBL reflect bt are in fact the same line of products, which can not help but I'm curious about whether the sound of this product is at the same level, so this evaluation is also my follow HD50 Once again began to evaluate the Meizu headset team's design skills.
About appearance:
I received the first version of the packaging, we can completely do not care about this package, but a little Tucao about packaging style really do not think there is a point of extra level of design, I feel for the test version of the packaging can be omitted a lot of description.
The back package mainly describes the five characteristics of the product: Bluetooth 4.0 wireless design, strong magnetic anti-slip design, ergonomic earmuffs, micro-power technology 6-hour call, line control functions compatible with mainstream system platform. The basic parameters are: CSR8645 chip solution, 8.6mm speaker unit, 16-ohm impedance design, maximum power 10mw, earphone sensitivity 88±3db, and battery life of 6 hours.
It touches the EP51 unpacking, the texture of this cargo really made me a stunning, still HD50's CD lines taste continued to the EP51 this small ear plug body, this frosted and CD lines together feel more than a lot of harmony than the HD50 . The red wire and the black three-button remote control part give me a little bit of a Tucao match with silver. The overall color system is more biased toward the result of the sporty wind, and the individual tends to have a strong texture or a small fresh direction.
The shape of the headset was rounded with a square structure and a circular metal thread bulge. I still can't help but feel that the accessories army likes to move a laser knife. However, this usage is quite correct. Therefore, the design of this kind of design still makes people feel that the texture is handled very well, especially in the space of the square circular structure, the circuit and the battery arrangement are balanced in volume and line decoration.
Meizu EP51 three-button operation is defined by the addition and subtraction symbol to control the volume size, the middle square concave key is responsible for playing and pausing, cut songs, then the top and bottom of the first music is a long press plus and minus keys, paired hold the concave key boot blue light flashes To start the pairing, it is as simple as switching the captain to press the recessed button.
The only thing that can be ridiculed is that the concave key has a square shape and is not marked. There is no blue light to indicate the operating status when the volume is adjusted. However, considering the headphone worn on the neck, you don't need such a logic.
EP51 as a Bluetooth headset naturally has a microphone design, the microphone is configured in the headset on the back of the wire, after wearing up the distance between the microphone and the mouth is very reasonable, so when picking up and directivity is quite good. EP51 headphones wire uses a high-purity oxygen-free copper wire core, built-in Kevlar material and TPE skin, for the skin-friendly and anti-allergy headphones are very good.
The Meizu EP51's charging port is on the side of the microphone and uses a dust-proof adhesive to prevent moisture corrosion and dust. Although the battery capacity is not indicated, it takes only 1.5-2 hours to fully charge the battery, and the battery life can reach 6 hours or more.
In terms of acoustic structure, the EP51 adopts a well-designed stencil design, with a plastic raised tab on the side to facilitate the positioning and wearing of the silicone sleeve, while the stencil surface cover has a certain additive effect on timbre enhancement and brightness extension.
For sound damping design, there is a hole below the sound outlet of the earphone as a sound adjustment design, and we can also use the acoustic damping material to adjust the sound's curve-style adjustment.
A total of four sets of three ergonomic silicone sleeves are provided for the EP51 accessory. The silicone sleeve design is based on the common support of the ear canal and the shallow ear canal, which effectively reduces the ear canal load pressure and wearing pressure. . Recently, I tried to bring an overnight and a full day without feeling exhausted or painful, so the sense of natural and foreign body wear was very good.
In addition EP51 also comes with a storage box, easy to put in the bag shockproof waterproof have a good effect, feel the feel of the headset on the inside to store just look good, especially to protect the headset shell to avoid the scraping of other items in the bag.
The pairing speed of the EP51 is quite good. Pairing can be found within ten seconds and the fluency of signals and sounds is quite stable. No sniffing, no pop, no noise, these are a bit overpowering for Meizu who first set foot in the Bluetooth headset.
Sound quality evaluation: Mobile side: Meizu MX5PRO IPHONE6S PLUS VIVO XPLAY5A
EP51 is to support APTX high-definition coding technology, compared to the traditional SBC coding technology, so that Bluetooth has a higher bandwidth and sound and audio wide display and richer details of performance, it is strange that IPHONE6SP phone can not support, but the domestic Meizu and VIVO Basically, such manufacturers generally support this technology in mid-to-high-end models, so the Android platform targets two mainstream APTX products.
Sound field performance:
The biggest problem as part of the Bluetooth headset is that the performance of the sound field due to high and low frequency bandwidths is limited by the bottleneck. The traditional SBC encoding method can easily cause attenuation of extremely high frequencies. The APTX encoding technology improves the resolution of the bit rate and bandwidth to some extent. Therefore, in the support of APTX mobile phone with the EP51 sound field will achieve the maximum effect, based on such a standard sound style.
EP51 presents a close-range indoor medium-range sound field with a good depth and width balance. It can basically achieve ideal restoration and highlighting of main details for large-scale movie scenes and concerts. It is not caused by the depression of general Bluetooth headsets and insufficient height of sound field. Feeling boring, especially the sound field background is relatively smooth, a little warm tone of the sound field is very flattering to listen for a long time, so you will not feel the sound field is tiring all day long, but the ears will have an objective The fatigue gradually increases over a long period of time.
Low frequency performance:
The EP51 low-frequency part is quite flexible and has quite detailed level. Especially in the Bluetooth products, unlike the general Bluetooth sound, the lack of low-frequency level is hard. Although the low-frequency strength is not very intense, it can be very flexible, after a long time. After taking the opportunity, it was found that the EP51 low frequency is a good reduction for the deep sound effects of many movies. Although the dive is not deep, it is possible to have relatively low-frequency listening details.
It can be said that when listening to music, there is no lack of level in the coexistence of softness. When listening to the sound of a movie, it can also express good rigidity and low-frequency dropping. It can be considered as a representative of the low-frequency flexible Bluetooth tuning. It is similar in taste to the HD50. The shadow.
IF performance:
The ep51 IF has a good density, which makes it possible to reproduce the details and density of the vocal detail and density that are generally easily lost by the Bluetooth headset. In particular, the general Bluetooth headset has a very low vocal bandwidth. The mainstream Bluetooth vocals are very thin and imaginary, lacking depth and density, and they also play a supporting role in the timbre analysis of midrange instruments.
The ep51's midrange design has a breakthrough sound style adjustment, especially a very good sense of hearing, even if the vocal range with the same price range is relatively open, there is very flexible and warm vocal detail is quite unexpected Outside. For normal Bluetooth, the vocal texture is very difficult but it is generally hard, but the EP-51 still has a certain sense of polish to increase the beauty of the vocal and Naiting.
High frequency performance:
EP51 high frequency is a good bright spot, the headset is not yet open before the high frequency is relatively dull, opened after the high frequency is relatively fresh and flexible and flexible details and resolution, this high frequency is very suitable for listening to soft musical instruments, with some The timbre of the sound is also flexible, so the high-frequency listening instrument has a texture that is very resistant to hearing.
The micro-details of the UHF part of the human voice can also be expressed, which makes the EP51 sound surprisingly good. It also shows that this headset has both high-frequency instruments and vocal UHF. On a decent level, you will easily mistakenly think that this is an ordinary wired headset HF.
Product summary:
For the sound quality of this headset, I think it's not good enough to do a good job of analysis. I hope that engineers can increase the stiffness of the diaphragm to improve the sound quality and resolution of the voice, avoiding the weakness of the mainstream Bluetooth voice. In particular, there are drawbacks to the mainstream design that do not listen to sound.
However, after the EP51 breaks open, it has produced quite different changes. The low frequency is gradually reduced from mixing stuffiness to proper strength and revealing details. The low frequency is more flexible and rich without hindering the playing of high-frequency details. The detail expression is mainly comfortable and has an analytically balanced neutrality. taste. The EP51 style is very suitable for people who wear Bluetooth for a long time, and it is also suitable for improving the headphone output on Meizu and other brands of low-end mobile phones to bypass the wired part.
The EP51 is much more enjoyable than the JBL reflect bt on the same production line. Compared to the price of thousands of yuans of the BETAs wireless2, the EP51 is comfortable and resistant to hearing too much. The EP51 sound is the most difficult to hear and the details are polished. There is no problem with sleeping plugs.
The EP51 sound is to allow me to surprise the bluetooth earbuds sound to achieve such a tuned sense of hearing direction, as the 8645 program's EP51 stability is higher than the 4.1 8651 program mainstream products, from the acoustic tuning structure, there is not much tricky The place is better than the design idea.
There are few products in the Bluetooth market that use sound quality as a premium benchmark, and they do not have the ideal reference for the industry. The benchmarking ladder appears to be confusing. The sound and price of the EP51 have a great impact on the market. It can also be regarded that the EP51 is designed to meet the value of the face but it depends on the strength of the existence of the product does not lose in the thousands of products. A friend today also discussed this product with me on WeChat. If Meizu digs up team resources such as Fengda, it still cannot do a good job.
For the author, there is no lack of technology in this year's rich, lack of technology, what is the design of the product and the judgment of the sound is more suitable for the market, can make their own taste in the popular market to adapt to different tastes, This is the design value route of EP51. EP51 is different from the mainstream sports performance pale sports Bluetooth headset (wearing uncomfortable or unpleasant), or to describe the advantages of product attributes on the scene, but the sound design experience combined with years of sound with a stable circuit to make an excellent Bluetooth sound quality The pursuit is very rare.
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