the most powerful brick? -- Feiao M15

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the year 2019 just passed is a new year for Feiao's blowout. Not only has Q5s, BTR5, K5 Pro, M11 Pro and other classic models been introduced vertically, but also the product line has been expanded horizontally, dabbling in such brand-new fields as noise reduction head wear and TWS. High yield is like that, which can be said to be the most diligent domestic manufacturer.

In the last few days of the end of the year, Feiao threw out another nuclear bomb. The launch of the flagship portable player M15 caused a lot of shock to the HIFI circle. The unprecedented reputation brought it a lot of attention and heat, and even became a new "Dream Device" for many burning friends 」. After two weeks of trial, I was deeply impressed by the new design, ancestral materials and fierce sound quality of M15, which has become my new EDC front end. here, I would like to share with you my trial experience ~


1. New design

look at the packaging first

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colorful outer box

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this time the packaging is very luxurious, the outer box, the inner box, the wooden box, the three layers

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North American walnut material, can be plate

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only went to the press conference to have the J autograph and the engraving of the media commemorative edition.

design, M15 uses a brand-new language, which is different from the previous M series and more like a large Q1mk2

has changed from M11's straight-line right-angle style to a symmetrical arc-shaped design with better grip on both sides, which is closer to black brick.

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changed from the AK straight edge type of M11 Pro to the arc type of black brick

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is still glass carbon fiber texture

is changed from a pulsator to a knob and moved to the top of the fuselage. The analog potentiometer design is adopted. The absolute position reflects the volume, making it more intuitive and convenient to adjust the volume. The knob has large damping, which can reduce accidental touch and improve adjustment accuracy.

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side control buttons also use a black brick-like arrangement, and add a physical Hold switch (praise) and a customizable button. What needs to be spit out is that the trigger force of the keys is relatively light, the body is very easy to be touched by mistake, and the shapes of the keys are consistent, lack of tactile instructions, and are not very convenient for blind operation.

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, the three earphone jacks were finally moved to the top of the machine and placed on the same straight line (obsessive-compulsive tear eyes). when using the base, LO was finally used... At the same time, brass decorative rings have been added to all three interfaces, and the 2.5mm interface on M11 Pro, which has no sense of existence, finally has a name.

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, it can be seen that although the shape has changed, the circumference of M15 is not obviously different from that of M11 Pro. The thickness and size are very close, but the weight is slightly increased.

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indicator light brings a little color to the monotonous black body, which can be set to turn off the constant light or breathe. In order to cooperate with the analog volume control, it can also indicate the current volume level through brightness, which is very intuitive. Unfortunately, the color indication of Q5s sampling rate could not be added, otherwise the intuitiveness can be further improved.

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the new DK1 base is a practical accessory used with computers. It can be used not only as a charging bracket, but also as a data input and output. It is more convenient to make DAC or turntable. Pre-purchase should be delivered.

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data supply port can switch between input and output, corresponding to the computer as DAC or turntable, and has an additional power supply interface to cope with the huge power consumption of M15.

on the whole, I still appreciate the new design idea of M15. The change of fuselage shape obviously improves the grip and connectivity. The circumference and weight are controlled to a more reasonable level and will not feel too heavy. The workmanship is still exquisite, and the double-sided glass sandwich structure has the texture of a mobile phone.

is the key that is very easy to be touched by mistake. It can be solved by placing it on the right side of the fuselage or increasing the strength of the key.


2. Extreme stacking

Feiao's characteristics in recent years is its insistence on "stacking. When others use one DAC, they have to use two. When others use 10mm units, they have to use 13.5mm. When others use a CSR8645, they put CSR8675 into Bluetooth...

Although stacking may not necessarily represent good voice, good hardware is the basis for training, and miracles often occur. Packing is more sincere than cutting corners.

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is the flagship player. It still uses the strongest SOC in DAP, Samsung Exynos7872. The performance of this CPU is about double that of Qualcomm's 425. Feiao has used three generations and has been optimized and eaten thoroughly, giving M15 the smoothness and response speed close to mainstream mobile phones.

Although this master is a bit old and only supports Android 7.0 at most, it is already the best choice that Chinese brick manufacturers can buy. DAP cannot buy a newer and stronger master at all... The main control performance such as Youshang's MTK is simply not seen.

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DAC is the core of the audio part.

In addition to SP2000,M15 is currently the only portable player that uses Asahi Kasei AK4499, and uses two pieces at a time. 4499 is currently the DAC with the highest single-chip index. It has been upgraded from a 4497 two-channel structure to a four-channel structure. If two-channel is used, it means that each channel of M15 is connected in parallel by four-channel DAC, which greatly improves the theoretical signal-to-noise ratio and dynamic range.

Feiao also talked about the DAC design process at the press conference. The cooperation with AKM was very deep this time. The decoding circuit was almost jointly developed. The Japanese headquarters provided a large amount of technical support for design and tuning. AKM's China president also attended the press conference on the same day.

Except for these two core components, other materials in the sound quality part have not shrunk at all.

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Double 4499 CSR8675 Ear Ramp

XMOS independent USB interface FPGA & amp;amp;amp; dual femtosecond clock system giant battery

the picture of dismantling the machine comes from Feiao official. Looking at some parts, I really think it is the material used for desktop computers. It is very terrible.

earphones and power supply parts pile up the most exaggerated thrust in portable players at present... Although THX is not used, this time the ten op amp system already has desktop-level output power.

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M15 has three blocks more thrust than my desktop all-in-one M500...

800mw under 32 ohms and 280mw under 300 ohms... m15 has blurred the limit between portable and desktop in terms of output power. The SMSL M500, an excellent all-in-one desktop machine for my own use, is only 570mw under 32 euros and 65mw under 300 euros...

M15 pushes all the big ears at hand, including HD600, K240s and GL1000C tablets, which are difficult to push, are very easy, and the plug is just like playing, very scary... The flagship HD800 and T1 were tested on the spot at the press conference. It can be said that the push-up effect is completely the same as that of the mid-range desktop system.

In order to ensure that the battery life will not collapse under such exaggerated output power, M15 is equipped with a 7490mAh giant battery, which has a larger battery capacity than many notebooks...

Feiao is played continuously for 15 hours. The actual use will be slightly shorter when the big ear mode and Android mode are turned on, about 10 to 12 hours, which is already very strong. Most flagship national bricks do not exceed 8 hours.

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this battery can last eight to ten hours at full power output, it is very fierce... And support QC and PD fast charging, charging speed is very fast

stacking is one of Feiao's leading product ideas in recent years. As Feiao's most expensive super flagship at present, M15 naturally makes stacking to the extreme. Not only have new heights been piled up in the sound quality related parts, but also in the user experience parts such as SOC and screen batteries. This solid hardware foundation, combined with increasingly perfect software optimization, has enabled M15 to become the "top flagship" in terms of sound quality and experience.


3. Function & sound quality

functions. All functions of M11 have been retained. M15 still represents the most versatile portable player.

Feiao's deeply optimized and customized Android 7.0 system has high purity and smoothness, and any APP can be installed through the built-in market or other third-party markets.

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core customization system and Feiao Music APP are almost the same as M11 Pro

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a ladder, you can go to the Netflix to watch the play.

this time, on the basis of Android mode and pure tone mode, USB DAC and Bluetooth reception are separated to form four working modes of M15.

M15 enhances the experience of using Bluetooth reception mode. It can not only be enabled with one click, but also automatically connect back. The overall connection speed is as high as Q5s and BTR5. The most important thing is that M15 finally supports AAC and AptX reception with the blessing of CSR8675. Apple users can finally experience the native Bluetooth connection without being tortured by SBC. It can also be regarded as an indirect solution to the problem of not supporting AppleMusic. After all, Bluetooth is much more convenient and energy-saving than turning on hot spots to connect mobile phone WIFI and then using Airplay.

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Pure tone mode is recommended for daily use, which can effectively increase battery life.

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the new details such as double-click wake-up and three-finger drop-down screenshots are very practical.

sound quality is not to mention too much. As one of the representatives of top sound quality, M11 Pro is already very close to the sound quality ceiling of portable players. M15 has become the portable player with the best sound quality at present with a little force.

Yes, I didn't add one, because in the portable players I have heard, even the top two or three times the price of Paw Gold Touch and SP2000 can only be said to be flush in sound quality (even the thrust and other parts are surpassed), not to mention the high-end DAP such as DX220 or brick black brick, which is completely crushed by M15. In the front end that can be taken out of the door, the only possibility I have ever heard that can obviously surpass the sound quality of M15 is Hugo2.

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M15 is relatively full and atmospheric, more intense than M11 and M11 Pro, and similar to SP2000. The low frequency has very excellent performance, with sufficient sense of quantity, but the texture is relatively compact, not paste or loose, and has very good dynamics. A very surging atmosphere can be obtained with headphones with low frequency diving and deep rebound.

The intermediate frequency is slightly warmer and closer, and the surrounding feeling is relatively strong. Texture is a soft and delicate style with AKM characteristics. It has no obvious dyeing, sufficient density, rich layers, no deliberate lightening or darkening, and is relatively loose as a whole. The Mid Treble part of the medium and high frequency connection is very bright, and the instrument and female voice have very good transparency and details. The extremely high frequency is not like the bright and "rough" orientation of 9038Pro, which still maintains the mildness and restraint of the Japanese DAC. Its orientation is very suitable for expressing strong vocals, such as Karise Eden and Adele, especially Live, which has a very real and Emotional atmosphere.

M15 has a flagship-level open sound field, precise image formation and sufficient resolution. The most characteristic is the explosion dynamics brought by sufficient thrust. Turn on the big ear mode and match the strong dynamic earphones with large unit amplitude, the focal Elex, to listen to the symphony scene or the original sound of the movie in the big scene, which is very close to the performance of the desktop system. Pushing the plug is even more like playing. Z1R, a plug that is difficult to push, takes off at a little volume. The output internal resistance is low enough, and there is no problem with all kinds of low-resistance moving iron. LO receives SP200 and still has an audible improvement, so if Feiao upgrades the THX earpiece part in the future and launches M15 Pro, the sound quality will have further breakthroughs.

to sum up, I can't pick out any problems with the sound quality of M15. The decoding quality is extremely high, the tuning is positive and atmospheric, the earpiece part has huge thrust, dynamic surging, and the resolution and sound field are of top level. In fact, the sound quality of portable players has basically come to an end. If there is no breakthrough in core technology (such as THX AAA), there will be no new rolling grade products in the short term, so there is really no need to pursue more expensive portability.

many people are curious about the comparison between M15 and PAW6000. Xiao Mo Ju is a very good player, but in front of M15, there is basically only a size advantage, and the difference in function and sound quality is still obvious, especially the fullness and thrust of sound, M15 is obviously higher than one position. According to the selling price, I personally recommend M15 more.


Feiao M15, as the most expensive product in Feiao's product line, is fully worthy of the position of the flagship. It has excellent workmanship and appearance design, the hardware foundation of stacking materials to the extreme, rich wireless functions, excellent system fluency and expansibility, the highest sound quality performance in the portable player and the powerful thrust without the right, and basically cannot find any hard injuries and deficiencies. Combined with the more conservative selling prices in top products,I personally think it is the most recommended one among the top players.

expect Feiao to further expand its product line in 2020, bring M15 design philosophy into earphones, decoding earphones and other fields, and launch some more amazing new products.

TuesdayQ Qiu Zijie01-14 18:40 Website: https://weibo.com/ttarticle/p/show?id=2309404460705062453588

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