AK4499EQ*2 | Samsung Exynos 7872 |

XMOS USB chip | 768kHz/32bit,DSD512 |

  3rd-gen FPGA technology | 2nd-gen All to DSD 

Flagship M15


Android Hi-Res Lossless Smart Portable Music Player


Cumulation of technology advancements

· 8-layer ultra-thick immersion gold PCB

Greatly improves space utilization, and ensures no interference between digital and analog circuits


· Independent shielding for digital and analog circuits + special absorbant material

For further improved shielding against interference, and pro-grade material specifically to absorb 2.4GHz waves further helps


· Customized thermally conductive silicone, graphene, and copper-nickel-zinc alloy heatsinks

Effectively conducts internally-generated heat to the outer body, which allows the heat to dissipate into the air

The two custom Japanese NDK femtosecond crystals in the M15 allow for a phase noise as low as -140dBc/Hz @ 1kHz offset. These crystals work in conjunction with the 3rd gen FPGA clock algorithm, for lower jitter and ultimately a more accurate clock for the DAC.

NDK femtosecond crystal

No nonsense, all high performance


Dual AK4499EQ flagship DACs

The AK4499EQ is AKM’s flagship third generation DAC. With four channels per DAC chip, a current output architecture, and being manufactured on the LSI special process, the AK4499 has impressive performance. The DAC chip is capable of decoding up to 768kHz sampling rate and native DSD512, and has a signal-to-noise ratio up to 140dB and THD+N as low as -124dB.

Handle it all with active servo power technology

For the first time, FiiO has implemented “active servo power” technology to the final amplification stage, which allows the power output to change depending on the user’s preferred settings. When paired with IEMS, you can set the M15 to be optimized for minimal noise as possible. But if you want to use your hard-to-drive 300 ohm headphones, you can enable Big Driver mode to turn your M15 into a power monster capable of pushing such headphones to their limits.

· PET coated, carbon fiber textured back cover


· 2.5mm/3.5mm/4.4mm headphone outputs


· Concentric round analog potentiometer volume knob

Every side is a beautiful side

· 7490mAh high energy density lithium cobalt oxide battery

· Custom FPC and Japanese SMK battery connector

· Supports QC2.0, MTK PE, and USB PD fast charging

15 hours battery life


1800 hours standby time

1800 Hours


Deep Sleep Time

7490 mAh


Ultra-high Capacity Battery



Dual Quick Charging Technology

15 Hours


Battery Life

Corning Gorilla Glass


5.15 inch/18:9


borderless screen

screen-to-body ratio

High density display

Gestures operation



10-finger multi-touch


million colors


Large screen display


High resolution

The M15 represents the 5th generation of the basic classic columnar design that defined FiiO’s previous models, such as the Q1 Mark II/K3/K5 Pro. The left and right sides are made concave to facilitate gripping the device, and the overall arced design gives the M15 totally unified design.

5th gen classic columnar design

Arched design for a comfortable grip

· 2nd gen global All to DSD functionality with significantly reduced power consumption

When All to DSD is turned on, the various kinds of harmonic distortion in music are more uniformly distributed for a more comfortable and fatigue-free experience.

A breath of fresh air with high quality music

The M15 adopts a fully balanced architecture to ensure every last detail can be heard without sacrificing bold dynamics. Inside this balanced architecture are: 2 all-new high-precision, low-noise, low temperature drift TI OPA2211 op-amps for the low-pass filter, 4 OPA1612 for IV conversion, and 1 OPA1622 for amplification of each channel.

Sharply dressed and well-equipped inside and out

Monstrous power output 

comparable to desktop amps


Under a 32-ohm load,single-ended output power is 490mW and balanced output power up to 800mW


Under a 300-ohm load,single-ended output power is 70mW and balanced output power up to 275mW

Android Mode

 Online Music、 WiFi Song Transfer Quick and easy 

Pure music mode

Enjoy music undisturbed, a pure listening experience;

USB decoding

 Suitable for desktop, listening to music in computer also have good sound quality

Bluetooth decoding

Capable of receiving any devices through Bluetooth, choosing ways for your preference to enjoy music.

一Add to favorites with just one click

一 Shuffle to the next track with just one click

一 Delete the song currently playing with just one click

一 Switch filters with just one click

一 Change EQ with just one click

一 Enter USB DAC mode with just one click

一 Enter Bluetooth decoding mode with just one click


A do-it-all button

Customizable multifunction key

CPU:Exynos 7872


DAC Chip:AK4499EQ*2


Supported rates:768kHz-32bit,DSD512 native


USB:Type C USB2.0


Screen:5.15 inch 1440×720 borderless 10-point touch display 


Dimensions:134mm×75mm×18mm (excluding volume knob)


Weight:approx. 310g


Charging time:<3.5h


Battery:7490mAh high-voltage fast-charging lithium ion


Battery life:15 hours


Output Power 1: 490mW (32Ω/single-ended/big driver mode)


Output Power 2: 70mW (300Ω/single-ended/big driver mode)


Output Power 3: 800mW(32Ω/balanced/big driver mode)


Output Power 4: 280mW(300Ω/balanced/big driver mode)


Frequency Response: 20Hz~90kHz(-3dB)


Signal to Noise Ratio: ≥122dB(A-weighted)


Noise Floor:PO<2.1μV(A-weighted); BAL<4μV(A-weighted)


Output Impeda nce: <1.1Ω(32Ω load)


THD+N: <0.0004%(1kHz/10kΩ)


When the M15 is used as a Bluetooth receiver, Qualcomm’s CSR8675 flagship Bluetooth chip comes into play for complete Bluetooth audio format support as well as enabling lower latency and faster transfer speeds.


Bluetooth transmission formats:SBC, aptX, aptX-HD, LDAC, HWA


Bluetooth reception formats:SBC, AAC, aptX, aptX-LL, aptX-HD, LDAC

Qualcomm CSR8675 Bluetooth chip


Supports two-way LDAC lossless



ADC curve reconstruction as employed in the M15’s volume adjustment solves problem traditionally associated with analog potentiometers, such as volume imbalance between the left and right channels.


The brightness of the pulsar light can be also adjusted with the volume knob, making each turn of the knob both a visual and auditory delight.

Analog potentiometer volume knob


Pro-audio grade volume adjustment

Not just a single-trick pony


Versatility in spades

· Supports DLNA, AirPlay, Wi-Fi music transfer

· Supports FiiO Link, allowing any smartphone

  to control the M15

· One click to display the track currently playing

· Karaoke playlist management

· Double-tap to wake

· Three finger screenshot

Whether online or local playback, wired or wireless audio, Bluetooth or Wi-Fi music, Bluetooth transmission or reception, USB output or USB decoding - the M15 can easily switch between all of these playback modes any time you want, and provide you an excellent experience in all modes.  

The king of different modes

The M15 supports decoding MQA tracks encoded in the 8x format for master-level sound quality, just as if you were actually in the recording studio.

Supports MQA 8x decoding

When in USB DAC mode, the M15 utilizes professional grade XMOS XUF208 USB chip, supporting up to 768kHz/32 bit and DSD512 input.

XMOS XUF208 USB chip


Supports up to



Exynos 7872 processor


Most powerful SoC among HiFi DAPs

· Dual A73 cores + Quad A53 cores


· 3GB RAM + 64GB storage + 2TB expansion


· Supports 2.4/5GHz dual-band WiFi

Ultra-low noise resistors:high precision 0.1% tolerance, low temperature drift, low noise film resistors


Dedicated audio capacitors:4 low-loss polymer tantalum capacitors + 4 Panasonic electrodeless film capacitors + 8 small film capacitors


Ample power reserves:28 220uF low-loss polymer capacitors, 5 100uF high-voltage capacitors


Impressive LPF configuration:Eight 4-way independent Panasonic metallized film capacitors


Parts worthy of a flagship

Present in the M15 is FiiO’s self-developed 3rd generation FPGA with more advanced algorithms, more accurate clocks, and even further reduced jitter.

FiiO 3rd gen FPGA

Noise floor as low as 2.1μV


Distortion as low as 0.0004%


S/N Ratio up to 122dB

A quiet listening background as black as the universe

Full digital audio format support


Finding new joy in music




Turn on car mode for lossless music on the road

Acts as a USB DAC with your computer 

Paired with the DK1 base/USB audio output to external DAC

Can be paired with a smartphone, EH3 NC, or EW1

The collectible North American Black Walnut wood box the M15 comes in give the player a flair befitting of its status. And to ensure your M15 looks pristine for years to come, included are tempered glass screen protectors.

Exceptional packaging for an extraordinary device

North American Black Walnut wood box