FiiO M11 Pro Stainless-Steel Limited Edition Smart High-Res Music Player [b-Stock]


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Brand: FiiO


M11PRO Stainless-Steel Limited Edition - Android-based Lossless Portable Music Player - Further powered, Wireless

M11 Pro Stainless-Steel Limited Edition is not only an attempt that FiiO pursued characteristic crafts, but also a declaration for audiophiles to show their individuality.

The distinction between M11 Pro and M11 Pro Stainless-Steel Limited Edition is the stainless steel chassis. In order to differentiate M11 Pro stainless steel edition from M11Pro, we adopted 316 Stainless-Steel, combined with both precise machinery and ingenious handicraft. Eventually we managed to create a delicate and noble limited edition serialized for its uniqueness.

AK4497 x2 | THX AAA | Exynos 7872 | 5.15" 18:9 TFT | AKM VELVET AUDIO architecture | Dual new crystal oscillators | AirPlay/DLNA/WiFi | 3GB RAM + 64GB built-in + up to 2TB expandable | Global All to DSD 

Building on the foundations of the M11, the M11 Pro SS has been updated to include:

1. Stainless-Steel chassis

2. Two carefully implemented AK4497EQ DAC chips based on the AKM VELVET AUDIO architecture. Compared to the AK4493EQ, the AK4497EQ brings better specifications and noticeable improved sound quality.
3. Dual THX AAA-78 amplifier module in a balanced configuration, the sound quality just gets even more amazing.
4. Dual independent crystal oscillators in an all-new upgraded clock system.
5. Double the internal storage from 32GB to 64GB.
6. The battery capacity raises from 3800 to 4370mAh.
7. The SD card expansion slot of the M11 Pro SS is one instead of two as in the the M11. 

Key features of the FiiO M11 Pro SS includes:

* Powerful Samsung Exynos 7872 processor
* Audiophile-grade 2x AK4497EQ DACs
* THX AAA-78 amplifiers in fully balanced configuration
* Dual independent crystal oscillators in an upgraded clock system
* Full-format Bluetooth transmission + LDAC lossless Bluetooth reception support
* 2.5mm/3.5mm/4.4mm headphone outputs
* Symmetrical USB Type-C connector with decoding and output functions
* AirPlay/DLNA/WiFi convenient wireless transmission
* Bluetooth/single-ended/balanced/line out/USB/coaxial output methods
* 3GB RAM + 64GB built-in storage + up to 2TB expandable storage
* 5.15 inch 18:9720P touchscreen
* Supports both QC2.0+MTK PEfast charging
* 9.5hours battery life, 55 days deep sleep standby time
* Global All To DSD functionality
* Open-source Android OS
* Dual Hi-Res Audio certifications
* Available in Black finish

Better equipment enables more possibilities - Audiophile-grade dual AK4497EQ DACs

To truly improve on the already excellent sound quality of the M11, the M11 Pro SS employs two carefully implemented AK4497EQ DAC chips based on the AKM VELVET AUDIO architecture. Compared to the AK4493EQ, the AK4497EQ brings better specs and actually noticeable improved sound quality. 

Extremely accurate yet natural sounding - Fully balanced THX AAA Amplifier

With the fully balanced THX AAA amplifier, the sound quality just gets even more amazing. The op-amps that are a part of the dual THX AAA-78 balanced amplifier architecture deliver extremely powerful output to easily drive most headphones. And using the same power supply, compared to typical amplifier, the THX AAA amplifier gives a more powerful output while being more efficient, resulting in less noise and distortion for a more precise yet natural sound. 

  • 0.5% high-precision thin film resistors
  • 4-way independent power supply
  • 6 layers of gold-plated PCB
  • 8-stage amplification

MQA Decoding for truly lossless playback 

The M11 Pro SS supports decoding MQA tracks in 8x mode. MQA encoded tracks can deliver ultra-high resolution lossless playback for stunning quality while only taking up tiny amounts of space - meaning you can carry more with you on the go. 

*MQA decoding currently only supports by the FiiO Music app. Future firmware upgrades will allow MQA decoding on third-party applications. 

Underneath the breathtaking exterior lies serious hardware

FiiO is the only one among companies of digital audio players to utilize the Samsung Exynos 7872 hexa-core processor. With performance comparable to the Snapdragon 625 and Kirin 659, the M11 Pro SS delivers a uniquely and exceptionally fluid experience when being used, allowing it to multi-task extremely well - ensuring you really get your music on demand. 

Dual independent crystal oscillators in an all-new upgraded clock system

Inside the M11 Pro SS lies two independent low phase noise crystal oscillators from Japan-based River electet, which when working together with FiiO's own self-developed FPGA greatly reduces any distortion when doing any audio processing and ensures the purity of audio signals in general, for further improvement to the sound. 

Pushing the boundaries of wireless Hi-Fi

M11 Pro SS can transmit the SBC/aptX/aptX HD/LDAC/LHDC Bluetooth format as well as receive certain formats. The M11's high-performance Bluetooth radio ensures you can transmit signals further with stronger overall signal strenght, so nothing can get in your way of enjoying quality wireless music. 

*At launch, the M11 as a receiver only supports SBC. Receiving LDAC will be enabled in a future firmware update.

A music player, but also a capable Bluetooth amplifier

When set to be in the Bluetooth receiver mode, the M11 transforms into a high-quality Bluetooth amplifier, with significantly better frequency response, as well lower distortion, noise floor, and crosstalk compared to typical Bluetooth solutions. On the top of that, the M11 can also output any received Bluetooth signals through the coaxial out to an external decoder. With the M11, you can enjoy truly divine sound over the wireless convenience of Bluetooth. 

Don't go without single-ended or balanced 2.5mm/3.5mm/4.4mm outputs all supported

We wanted to make sure you can listen however you want, so the M11 Pro SS has 2.5mm balanced, 3.5mm single-ended, and 4.4mm balanced outputs. Freely use and switch between the different outputs to listen however you want.  

Embrace the era of wireless with 2.4/5GHz dual-band Wi-Fi

With the M11's dual band Wi-Fi radio, you can expect better signal strenght as well as  faster and more stable connections - especially when using Wi-Fi on the 5GHz band to avoid interference 2.4GHz Bluetooth.  

A naturally timeless

Like the M11, you'll only find straight edges on the M11 Pro SS in its purely polygonal style that looks visually arresting, yet cohesive and natural. On the left of the device you will find the gold-plated nickel letters "PRO", hinting at the immensely upgraded components inside. 

Go to new horizons with a bold screen

The large and colorful 5.15-inch high-definition display with 10-point multitouch and 1440*720 resolution is highly immersive, with its almost borderless design lending it a more visually rhythmic flair. 

  • 90.0% (high screen ratio)
  • 10-point touch (with gesture recognition)
  • 312 PPI (high pixel density)
  • 5.15 inch (large display)
  • 16.7M colors (large color gamut)
  • 1440*770 (high resolution)

Pleasingly electrifying at every touch - Glass-backed design + PET coating technology

The stylish glass-backed lets you immediately make a tactile connection with the M11 Pro SS with just a single touch. The glass stays lustrous too, with both the front and rear glass coated with an oleophobic layer. The rear glass is also coated with PET coating, and the carbon fiber texture on the body further enhances the comfort of your grip too.  

Generous amount of storage and RAM for an effortless experience - 3GB RAM+64GB internal storage+2TB expandable

With 3GB of RAM and 64GB of built-in storage, you can be sure the M11 Pro SS multitasks effortlessy and without fail. And with the ability to put in a micro SD card up to 2TB for vastly more storage, you can carry thousands of lossless songs with you without having to worry about space.  

  • 3GB | 64GB | 2T

Large 4370 mAh battery, with QC2.0 and MTK PE fast charging

Nobody wants to wait a long time for charging. To minimize this problem, the M11 Pro SS supports both Qualcomm's QC2.0 and MediaTek's Pump Express fast charging standards, allowing the M11 to fully recharge its large battery in merely 2.5 hours! The large built-in 4370 mAh battery allows for continuous listening up to 9.5 hours, and for standby in deep sleep mode up to a massive 55 days.    

Open-source Android OS with switchable Android/Pure Music modes

The M11 features a deeply customized version of Android, with a highly optimized audio software architecture that circumvents SRC for global truly lossless audio. Unique to FiiO's custom version of Android is the ability to switch between Android and Pure Music modes - in Pure Music mode, only the built-in FiiO Music app is allowed to run, for the purest music listening experience possible. 

FiiO Link for convenient remote control over Android/Apple

Simply install the FiiO Music app on your Android/Apple device to wirelessly control the M11 Pro SS, while also showing the M11 Pro SS's current playback status. Song selection, play/pause, volume adjustment, playlist management. 

*Android devices can control through Bluetooth or Wi-Fi, Apple devices can only control through Wi-Fi

Symmetrical USB Type-C with USB DAC support up to 384kHz/32 bit

Present on the M11 Pro SS is the modern symmetrical USB Type-C connector. Supported functions over USB include charging (with support for USB PD 2.0 chargers), USB storage, USB Audio, and USB DAC.

Your personal music portal - Get your songs through DLNA, AirPlay, or Wi-Fi

You can play songs stored on your PC or NAS through DLNA, while those with iOS devices can use AirPlay to push songs to the M11 Pro SS. You can also transfer songs to the M11 Pro SS through your web browser or other mobile device via Wi-Fi.

Experience endless possibilities with USB Audio output

The M11 supports DoP/D2P/Native output of DSD over USB. Experience the numerous possibilities in sound when connecting the M11 Pro SS to different decoders via USB. 

Multifunction output jack with SPDIF

Through the single coaxial output jack, you can connect to speakers, amplifiers, and decoders using the appropriate output (coaxial, optical SPDIF, etc.)

Global ALL TO DSD functionality for a riveting experience

PCM -> DSD2.8M - With the All to DSD function on the M11 Pro SS all PCM audio signals will be converted to the DSD format. 

You will only truly know what is the definition of immersive after hearing this. When using All to DSD mode, any PCM audio signal is converted to DSD, and then decoded to analogue as a DSD digital signal - which results in a different, yet clear sound. And not just the built-in FiiO Music app supports this mode - all apps that can run on the M11 Pro SS do too.

All-new dynamic EQ with 8 presets

The M11 Pro SS contains an all-new 10-band dynamic EQ capable of increasing or decreasing each band by 12dB. With the built-in pop, blues, classical, jazz, rock, dance, metal, and vocal presets as well as a user-defined custom EQ, you can get your music to sound exactly the way you want it. 

 Hi-Res Audio Wireless certified

Besides having received the Hi-Res Audio certification from the Japan Audio Society, the M11 Pro SS is also Hi-Res Audio Wireless certified - so you can be sure of the strength of its wireless audio capabilities. 

Accessories included to cover all of your needs

Included with the M11 Pro SS is a transparent TPU protective case and a 7H tempered glass screen protector. The TPU protective case has been specially engineered to be tough enough to effectively protect the M11 Pro SS. And the screen protector is not only hard enough to prevent your screen from being scratched, it also boasts a 90%+ light transmittance rate so your screen is still bright and easy to look at.

*Tempered glass screen protector is pre-applied from the factory. 


  • CPU: Exynos 7872
  • DAC: AK4497EQ*2
  • USB DAC: 384kHz/32bit
  • DSD: DSD256
  • USB: Type C USB 2.0
  • Display size: 5.15 inches
  • Chassis: 316 Type Stainless-Steel (serialized)
  • Dimensions: about 130mm x 70.5mm x 16.5mm
  • Weight: > 232g
  • Charging time: <2.5h (QC2.0, 18W Fast-charging)
  • Battery capacity: 4370mAh
  • Battery life: 9.5 hours
  • Output power 1: 200mW (32 Ohms/PO)
  • Output power 2: 550mW (32 Ohm/BAL)
  • Frequency response: 5Hz-85kHz (-3dB)
  • SNR: =>118dB (A-weighted)
  • Noise floor: Po<3uV (A-weighted); Bal <4uV (A-weighted)
  • Output impedance: <1.1 Ohms (32 Ohm)
  • THD+N: <0.00084% (A-weighted)
  • Peak Output Voltage: 11.87Vp-p (Bal)

A ´B-Stock´ is a product which has been returned by a customer within their 14/30 Day Money Back Guarantee.
These items are offered at a special, reduced price. Please note, that occasionally the packaging is no longer in pristine condition.
B-Stock products are in full working order and are checked by specialists before releasing them as B-Stock. They come with the full 2 year warranty as any other new product.
Any special comments about a B-Stock product will be noted at the beginning of the article description.


FiiO logo

About FiiO Electronics Technology Co., Ltd.

01 Brand Introduction - HiFi+Fashion

FiiO Electronics Technology Co., Ltd. was established in 2007.  It is a high-tech enterprise that combines research, development, production and sales, and its sales are mainly based on its own FiiO brand as opposed to OEM/ODM.  It focuses on digital audio, with current mainstay products being portable headphone amplifiers, DAC / amps and portable digital audio players.

FiiO: It is composed of Fi (Fidelity) from HiFi and iO (represents number 1 and 0) which indicates the sincerer feeling and more convenient life the digital tech has brought to us.

飞傲: The Chinese transliteration of FiiO, as well as representing youthful vigor and the active & innovative spirit of the company.

Audio products are meant to fulfill the spiritual pleasure of users.

  1. FiiO provides products and service related to music.
  2. We also hope to bring happiness to our users with the provided products and service, which is also the key value of FiiO.

Customer Service

  1. Good after-sales service, more reliable
  2. Great user experience, more pleasure
  3. Variety of activities, more involved

About products

  1. Affordable: FiiO products are well-known for its feature of high cost-performance. Lowering the entry level to make more customers can afford.
  2. Easy to use: FiiO pays great attention to the user experience. We are not only provide products with high quality, but also easy to use and with long lasting durability.
  3. More accessories bring more fun: Enable to play in a variety way and use under more possible environments.
  4. Updates available: Equipped with a variety of ports, it makes the music players can still connect to external amp/DAC for upgraded enjoyment.
  5. Endless transformability available: With replaceable amp module and expandable storage, the X7 can bring more playability.

02 Company Profile

Research & Development Team

  • Twenty years of R&D experience in audio products
  • Former core R&D team for audio products from OPPO
  • A team of 20 professional R&D engineers in software, hardware, industrial design, structure and electro-acoustic.

Research & Development Investment

FiiO keeps bringing in advanced equipments and high-tech talents so as to ensure the stable growth and long term competitive edge. Up till now, the team size has expanded three times than that of 2007 when we established.

Team Composition

The R&D team is made up of development dep, engineering dep and QC dep, with 60+engineers in total.

Authorized certifications

FC, CE, KC, CCC and ISO9001:2008 ensure the safety and quality of the products.

Production management

FiiO has strict requirements to production with almost “zero tolerance” even to small problems, which is strictly in compliance with the International Quality Management System ISO9001. 

QC Equipment 

  • a. AP audio analyzer (valued at 200,000RMB).
  • b. Life-span test platform against high & low temperature, swing and plug & unplug trial.
  • Aging test carriage towards mass production.
  • Aging test machine under high & low temperature.

Customer oriented

Driven by customers’ needs, we innovate constantly and response promptly to the market changes. We develop new products based on customers’ needs and compete for more market shares.

Company culture - Our Vision

Present the world a better “Made in China”.

Brand Spirit

  • Innovation

the earliest company that designed the minimum volume headphone amplifier. First dockable amp & DAC product. First amp specially designed for iPod/iPhone. First amp with adjustable power supply and power supplied by mobile phone battery. First multifunctional headphone amp & DAC for Android smarphone. First Hi-Res music player at a price lower than 1000RMB supporting 192K music. First Android-based Hi-res music player. 

  • Quality

Repair Rate < 1%. Sound Quality Control system. Original components imported from TI, Wolfson, Maxim. Company-wide quality control. +20 quality engineers and inspectors. Complete testing facilities. 

  • Service

CEO at the frontline of customer service. 100% response to enquiries. The most popular headphone amplifier brand on Head-Fi. First class website and contents in the audio industry. Interaction with and support to customers on Facebook and Microblog (twitter-like social website).

Brand Mission

FiiO designs, produces and sells high-quality products at favorable prices to those who love music and style.

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FiiO M11 Pro Stainless-Steel Limited Edition Smart High-Res Music Player [b-Stock]

b-Stock product, (read below) in excellent conditions, WITHOUT TRANSPARENT PROTECTIVE CASE, full warranty.

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