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FiiO S15
Desktop High-Res Audio Streamer S15
Media streamer·local playback·decoder·preamplifier | Flagship AKM DAC combo AK4191+AK4499EX | Ultra-low phase noise femtosecond crystal oscillator | Android 12+custom landscape display | Snapdragon 660 + Qualcomm QCC5125 + XMOS 16-core XU316 | 35W low-noise linear power supply | 7.84-inch automotive-grade large color screen | Fully balanced analog audio architecture | HDMI/ARC decoding
*Pictures are for reference only. The real product may vary.
An all-in-one HiFi solution for the living room Premium versatility , Deeply capable
FIIO’s first full-size, all-in-one media streamer S15
Proficient in media streaming/network streaming/LAN playback/local playback decoding/preamplifier/digital jukebox
Equipped with flagship parts, a wide variety of interfaces, and numerous ways to control it, and is fully compatible with external decoders/amplifiers/speakers With its uncompromised high performance and numerous methods to help you easily control your music, it redefines what a media streamer can do.
Majestically grand, Rock-solid
Full-sized, all-metal construction, phenomenal sound
The S15 features a standard width of 430mm, allowing it to seamlessly integrate with your other equipment in the living room to create a unified audio system. Thanks to its 5 kg all-metal body and stable non-slip feet, it effectively prevents sound degradation caused by vibrations.
7.84-inch automative-grade large color screen,Excellent usability
With a larger color screen than similar products, combined with a custom Android 12 build that features a custom landscape display system, the display is clear and easy to read. Interacting with the device directly is intuitive, so that it is easy to handle various operations right out of the box. You can directly feel how each touch gets you easily and quickly to where you want.
35W low-noise linear power supply Ample energy source
The S15 is powered by a custom high-quality low-noise transformer that ensures the purity of the power supplied. It is also equipped with four 4700μF ELNA audio capacitors that serve as an ample power reserve for continuous power.
Cutting-edge masterpiece A window into the future
Everything is covered,A true audio “master”
Streaming media: Android 12 + a custom landscape display system means you can freely install many apps and smoothly use them. Network streaming: With it being Roon Ready and AirPlay, and capable of DLNA streaming and Bluetooth reception, you can enjoy high-quality streaming music.
LAN playback: Play music from your NAS/LAN/cloud servers through network protocols including UPNP/SMB/WebDAV.
Local playback: Besides locally stored music, you can also play files from microSD cards, USB flash drives, portable hard disks, and other devices.
Precisely restored audio,Every last detail present
Dual ACCUSILICON high-performance ultra-low noise femtosecond crystal oscillators
For the first time, FIIO utilizes two industry-leading ACCUSILICON AS318-B series ultra-low phase noise femtosecond oscillators (45.1584MHz, 49.1520MHz), which have been fully screened. These effectively reduce the impact of phase noise on audio signals, resulting in high levels of decoding fidelity and digital output precision. When paired with high-performance external decoders and amplifiers, you can achieve reference-grade sound.
Proprietary DAPS (Digital Audio Purification System)
No resampling throughout
FIIO’s proprietary (DAPS digital audio purification system), composed of a custom Android audio core and a low-jitter clock coprocessor, has been refined over many years. It allows for non-resampled audio globally at both the application and system levels. It can also accurately match various sampling rates of PCM and DSD audio for purer music.
Digital-analog separation Exactly reproducing the original sound
AKM flagship DAC combo AK4191+AK4499EX
Like in the Q15, K9 AKM, and M23, the S15 also utilizes the highly acclaimed AKM flagship DAC combo - AK4191+AK4499EX. This combo is based on a new design that fully separates the digital and analog portions and also incorporates ‘DWA ROUTING Technology’ – all of which enhances signal-to-noise ratio and reduces noise across various amplitudes. The audible result is a cleaner background and improved resolution to deliver a natural, relaxed, and totally unstrained sound.
Fully balanced analog audio architecture
The S15 uses a fully balanced design, including everything from the DAC decoding to the preamplifier stage. Such a design significantly reduces noise and crosstalk and improves the line and preamp output quality – for which you can choose between fixed or variable gain. The IV, LPF, and other audio sections count on OPA1612 low-noise precision op-amps for high voltage supply to ensure the dynamics in your music are faithfully reproduced.
Premium materials All in the quest for sound quality
Physical partitions and shielding Enjoy “pure” heavenly sound
The digital, analog, and power sections are physically separated to prevent mutual interference, which ensures signals are accurately processed and all dynamics within the music are preserved. The end result is that you get to enjoy “pure” heavenly sound.
Precise power supply design
Separated digital and analog power supplies
This design effectively prevents crosstalk between the analog and digital audio circuits. It also provides better power isolation and interference resistance.
Multi-stage analog power supply
The analog section is powered by a multi-stage power supply, with precisely divided stages for components like the DAC and LPF. Each stage employs numerous precision low-dropout regulators (LDOs) for secondary regulation to ensure a consistent, stable and pure power supply.
Flagship configuration Seriously capable
New FIIO OS landscape display system
Custom landscape display system
FIIO’s new custom landscape display system is specifically optimized for landscape screens like that found in the S15. It not only sports a clean and intuitive layout, but also boasts enhanced visual effects for a more immersive experience. It can be easily controlled via close-range touch, companion app, or Bluetooth remote, making it effortless to control whichever way you want to.
Custom landscape version of FiiO Music
A custom version of FiiO Music tailored for the S15’s display provides quick access to various music playback and setting menus. It supports visual audio effects like VU meters for a more pleasant visual experience.
Customizable home screen
Unlike other streamers, the S15 allows you to greatly customize it. You can freely edit the home screen layout to better suit your needs.
Genuinely intelligent Easy to control
Dual knobs + Dual virtual keys
Smart Bluetooth control Control without worries
App remote control Innovative dual-screen display
The knobs allow for more flexibility, while the virtual keys allow for quicker and more convenient controls for certain operations.
The included Bluetooth remote control allows you to easily manage music playback and volume adjustment from a distance, including adding tracks to “My Favorites” with just one click. The remote also supports gesture control that lets you handle complex operations seamlessly, ensuring an effortless and outstanding audiovisual experience.
FIIO is committed to enhancing the user experience. We have designed a dual-screen display feature within the companion app to allow you to have comprehensive control of the S15 at your fingertips using your phone.
An audiovisual feast,Here it begins Supports HDMI/ARC decoding
The S15 boasts HDMI 2.0 decoding, HDMI output, and even HDMI ARC (Audio Return Channel) capabilities, allowing it to be a crucial component of your audiovisual setup. With the included Bluetooth remote control, instantly immerse yourself into a sumptuous audiovisual feast. HDMI decoding/output: Supports 192kHz/24bit sampling rate HDMI ARC: Supports 44.1/48kHz sampling rate
Chock full of connectors Easily take to the stage
10-band high-precision PEQ Boundless enjoyment
With FIIO's proprietary PEQ algorithm and interface, you can finely adjust the PEQ's frequency points, gain, bandwidth, and Q value or correct the headphone's frequency response curve or simulate those of others to your taste.
Truly versatile All-round brilliance
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FiiO S15: full-size streamer with transparent, musical delivery
The FiiO S15 is a full-size desktop streamer and DAC that delivers a transparent, lifelike sound with a neutral‑warm tonal balance and excellent resolution. Reviewers from Enjoy The Music and Audiophilepure praise its detailed imaging, broad soundstage and natural dynamics, while Soundnews highlights resolution and build quality. The Android touchscreen, M.2 and microSD storage, balanced XLR/RCA outputs and AKM DACs give the S15 wide connectivity and system flexibility. In use it pairs musical immediacy with technical poise, making the S15 an attractive, feature‑rich centerpiece for desktop rigs or headphone setups and a compelling value against costlier streamers.
Pros
- Exceptional transparency and musicality with detailed resolution and natural dynamics, delivering lifelike presentation in desktop and headphone systems.
- Very feature-rich connectivity: touchscreen Android OS, M.2 SSD and microSD storage, balanced XLR/RCA outputs, HDMI and modern Bluetooth codecs for flexible integration.
- Strong value proposition — performance and build that reviewers say competes with much pricier streamers at roughly the sub‑$1k tier.
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Cons
- Bluetooth decoding and wireless listening modes are notably behind local playback or USB decoding in treble extension and overall refinement.
- Soundstage and texture can be connection-dependent: XLR outputs outperform RCA for staging and separation on some systems.
- The Android-based interface and multifunction controls have a learning curve that some legacy audiophiles may initially find fiddly.
Transparency
90/100
Multiple reviews explicitly call the S15's output 'transparent' and praise its neutral-warm tonal balance and detail retrieval (Audiophilepure, Enjoy The Music, ecoustics). Soundnews resolution/frequency metrics (91/92) support a very low-coloration presentation. No reviewers reported hum/hiss or noisy background, so transparency is scored near the top end but not pushed into reference-only territory (no repeated 'black background' superlatives).
Sound Quality
88/100
Dynamics
88/100
Dynamics are frequently praised: listeners reported natural, punchy transient response and good left-right balance (Audiophilepure, Soundnews). A few comparisons (to the Moon 681) note that the S15 is slightly less mighty, so dynamics score strong but not class-leading reference level.
Soundstage Imaging
87/100
Several reviews describe a broad, layered soundstage and pinpoint imaging when recordings permit (Audiophilepure, Enjoy The Music). Some outputs (XLR) are noted as superior to RCA for staging and texture, suggesting very good but recording- and connection-dependent spatial performance.
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Build Quality
88/100
Reviews describe the S15 as a well-built full-size streamer with a large touchscreen, solid chassis and attractive industrial design (ecoustics, Enjoy The Music). Soundnews also rates build quality highly (88), and there are no reports of fit-or-finish issues, supporting a high score.
Features Connectivity
92/100
The S15 offers abundant connectivity (RCA, XLR, HDMI, USB, microSD, M.2 hard drive support), strong wireless codecs (aptX HD/Adaptive, LDAC), touchscreen + remote + companion app and Roon Ready compatibility (ecoustics). That rich feature set places it in the 'fully featured' tier for this category.
Value for Money
92/100
Reviews repeatedly praise the S15 as a well-priced streamer for its performance; Enjoy The Music and Audiophilepure express surprise at the sonic quality for the advertised sub-$1k street price. Product metadata lists a retail of $1,099.99 while many reviews reference $999; because reviewers consistently framed the S15 as a justified premium at ~$1k and labelled it 'viable' and 'well priced', the value score reflects explicit praise but is slightly conservative given the SKU price discrepancy noted in metadata.
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