Q5 Q5S should be considered a very successful product for FIIO, after all, it can be remembered and sold out repeatedly! And Q15As an upgraded version of Q5S,It should be regarded as a work of comprehensive transcendence,As far as my personal preference is concerned,I would think that Q15 is better than Q7 existence,Especially in terms of fuselage size in the product system of FIIO,Q15In fact, it is not a big tail,At most, it is a "middle tail"......
|Talk out of the boxThe outer packaging of Q15 uses the new FIIO family design language, which is different from the packaging of the previous Q7 and M series, which looks more simple and fashionable while still having a sense of technology. In the process of unboxing, you can find that Q15 has black and titanium2 colors to choose from,Of course"Pocket desktop"The definition is in Fiio, I personally think it's not strange,After all, ka17It's called a mini desktop......
In terms of accessories, FIIO is relatively generous, including**cable ties, silicone pads, data cables, adapters, charging cables, flannel bags, and you can also get a Q15 leather case (just the Q7 kind) in the official way by posting a single after purchase.
In terms of exterior design,I think compared to the current Q series flagship is a state of comprehensive evolution,The fuselage adopts a symmetrical design,Cancel the line design used for heat dissipation on the Q7,The function buttons are all concentrated in the upper part of the left side of the fuselage,It's quite comfortable for one-handed operation。
The Q15 in my hand is titanium,It will show a slight touch of metallic blue indoors,Match the black metal at the top and bottom of the fuselage,Unilaterally, I think it's much better than black! 
The top of the fuselage is a multi-function knob and 35/4.4. The output interface at the bottom of the fuselage contains a mobile phone power supply switch, a coaxial input interface, a data interface, a fast charging port, and a D·mode switch.
What exactly did Fiio cram into the Q15? I saw the Q15's business details page and review guide, and it was really numb! I'd love to throw out that picture from the detail page!! 
Q15 uses a new generation of desktop mode D·mode, and is equipped with an independent Type-C power supply port, when the device is connected to the PD adapter, Q15 will be completely powered by the outside from the battery, and then there is an output power of 1600MW+1600MW. 
The DAC of Q15 adopts the combination of AKM's flagship sequence AK4191EQ + AK4499EX, combined with FiiO's self-developed digital core XMOS16 core XU316, which brings the highest 768kHz 32bit &dsd512&MQA fully deployed decoding capability. Thanks to the blessing of QCC5125, Q15 supports the current mainstream Bluetooth protocols, including LDAC APTX Adaptive APTX LL and other high-definition protocols. 
The Q15 has a complete audio architecture of DAC-UV-LPF-Gain-Earphone amp, variable gain and variable power supply voltage design, with low voltage and low gain and high voltage and high gain play, which is perfectly suitable for earbuds and some headset large ears (15 channels of digital analog power supply, distributed energy storage, and 21 low-noise LDO precision voltage regulators, distributed with 35 low-internal resistance tantalum capacitors).
FIIO has always paid more attention to its own ecological construction, and the FIIO Control APP can refine the settings of Q15, such as PEQ, which FIIO has always been proud of, to perfectly match the earbuds and the user's taste. Sound & GameplayNo matter how hard the hardware is piled up,In the final analysis, we still have to talk about sound,Q15It has a rich input interface that brings more playability,But for me, what can be used is USB&Bluetooth mode,Coaxial is a giveaway for me,Then the question also arises,Q15Is it good? How's the sound bottom? How big of a difference will there be between USB and Bluetooth in terms of sound? Is desktop mode really good?
Q15 Is it good? More than 2000The price is used on AKM's AK4191EQ+AK4499EX flagship decoding,I think the basic disk of sound is very stable,Especially the extremely high decoding ability,With many ** software on the computer to listen to some high-bitrate files is not a problem,Even at the quality levelQ15 is also very capable of leapfrogging!
What about the sound bottom of Q15? The four words neutral, clean, transparent, and accurate can be used as standard answers to Q15 sound bottoms. The whole sound floor is lukewarm neutral presentation,Whether it is pure** or vocals, it gives people a very clean sense of hearing,It is relatively balanced in the three-frequency distribution,The extension at both ends and the entire sound field form are also unconventional,And the last accurate one is just right when it is used to listen to instrumental music or vocals,It will not give people a digital taste because the analysis is too high or the analysis is insufficient to make people feel confused。
There will always be differences between Bluetooth and USB sounds, the default state of Q15 is LDAC when connected, and APTX Adaptive needs to be enabled after selecting it in the Fiio Control App. As far as my own listening sense is concerned, the sound of Bluetooth will be softer than that of a USB connection, and if it is a large program or a track with high transient requirements, it will lack a bit of crispness, but if it is a popular vocal that focuses on emotional expression, Bluetooth is quite right. So if I have to choose,I'll choose USB mode,Anyway, Q15You can turn off the switch of the mobile phone's power supply,So that the actual power consumption of the mobile phone is not so urgent。
After plugging in the power supply and starting D·mode, it automatically enters the super big ear mode, and the loudness of the sound has not changed too much, which effectively avoids the occurrence of blowing up the ears (of course, it is not excluded that the volume of my daily listening to songs is not high), the sound is fuller when using earbuds, and the shape of the human voice changes the most obviously, that is, it is closer and thicker, and the bottom of the sound has become slightly warmer from neutral, but it is too scared to change the big ears! FT5It's pushed quite like that,But after getting on the big ears, I found that Q15 is actually not enough in terms of informationFT5,The overall sound density is still significantly different from that of its big brother Q7 (this is nonsense),But FT5The sense of frame and extension at both ends are still pushed with a decent ......
Write at the endFiiO's Bluetooth decoding headphone amplifier products have their corresponding price layouts, BTR15 within 1,000 yuan, BTR7 at 1,000 yuan, and the flagship Q7 of Bluetooth decoding headphones at 4,000 prices. FIIO Q15 with its neutral, clean, transparent, accurate sound base with rich playability and relatively non-martial driving power, is undoubtedly the best choice for Bluetooth decoding headphone amp at the 2K price point, so FIIO not only understands the product but also understands your wallet very well! And the reason why I personally prefer to recommend the Q15 over the Q7 is simple: it is more portable! Therefore, FiiO has made hundreds to thousands of dollars, and you can choose according to your own wallet......