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FiiO M15 Digital Audio Player

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FiiO M15 Digital Audio Player

  • Flagship M15 Android Hi-Res Music Player

  • Dual AK4499EQ flagship DACs

  • Samsung Exynos 7872 CPU chipset

  • XMOS USB chip

  • Qualcomm CSR8675 Bluetooth transmission at lower latency

  • Supports 2-way aptX-HD, aptX-LL, LDAC codecs

  • Supports up to 768kHz/32bit, Native DSD512

  • Supports MQA 8x decoding

  • 3rd-gen FGPA technology

  • 2nd-gen All to DSD



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 DSD12, and has a signal-to-noise ratio up to 140dB and THD+N as low as -124dB.

XMOS XUF208 USB chip
Supports up to 768kHz/32bit, DSD512

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

Qualcomm CSR8675 Bluetooth chip
Supports two-way LDAC lossless Bluetooth

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

Exynos 7872 processor
Unrivalled processing power

  • Dual A73 cores + Quad A53 cores
  • 3GB RAM + 64GB storage + 2TB expansion
  • Supports 2.4/5GHz dual-band WiFi

NDK femtosecond crystal

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.

FiiO 3rd gen FGPA

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

Parts worthy of a flagship

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

Technologically rivals the best smartphones

  • 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

Sharply dressed and well-equipped inside and out

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.

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.

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

A quiet listening background as black as the universe

  • Noise floor as low as 2.1μV
  • Distortion as low as 0.0004%
  • S/N Ratio up to 122dB

15 hours battery life, 1800 hours standby time

  • 7490mAh high energy density lithium cobalt oxide battery — 1800 Hours Deep Sleep Time & 15 Hours Battery Life
  • Custom FPC and Japanese SMK battery connector
  • Supports QC2.0, MTK PE, and USB PD fast charging — QC2.0/MTK PE Dual Quick Charging Technology

5th gen classic columnar design
Arched design for a comfortable grip

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.

Analog potentiometer volume knob
Pro-audio grade volume adjustment

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.

Corning Gorilla Glass
5.15 inch/18:9 borderless screen

  • 86.0% screen-to-body ratio
  • 10-finger multi-touch Gestures operation
  • 312PPI High density display
  • 16.7M million colors
  • 5.15inch Large screen display
  • 1440×720 High resolution

Every side is a beautiful side

  • PET coated, carbon fiber textured back cover
  • 2.5mm/3.5mm/4.4mm headphone outputs
  • Concentric round analog potentiometer volume knob

A do-it-all button

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 breath of fresh air with high quality music

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.

Supports MQA 8x decoding

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.

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

The king of different modes

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.

  • 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.

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

Exceptional packaging for an extraordinary device
North American Black Walnut wood box

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.

Technical Specifications

Additional Information

Web Reviews
Colour Black
Warranty 1 year (local)
Product Weight (g) 307
Availability Discontinued
Product Type Digital Audio Player
Style/Type Portable
Features AAC, AirPlay / AirPlay 2, aptX, aptX HD, aptX Low Latency, Bluetooth, DLNA, DSD, Dual Headphone Output, Expandable Memory/Storage, High-Res Audio Certified, LDAC, MQA (Master Quality Authenticated), Music Network Server, Music Streamer, SBC, WiFi
DAC AKM AK4499EQ x 2 (Dual)
Storage Capacity 64GB + up to 2TB
Sampling / Bitrate up to 768kHz/32bit, DSD512 native
Frequency Response (Hz) 20Hz~90kHz (-3dB)
Signal-to-Noise Ratio (SNR) ≥122dB (A-weighted)
Total Harmonic Distortion (THD) < 0.0004% (1kHz/10kΩ)
Output Power 490mW (32Ω/single-ended/big driver mode); 70mW (300Ω/single-ended/big driver mode); 800mW (32Ω/balanced/big driver mode); 280mW (300Ω/balanced/big driver mode)
Battery Life (hrs) 15 hours
Input Connectivity Bluetooth, USB Type-C (USB-C), WiFi
Output Connectivity 3.5mm Stereo, 2.5mm Balanced / 4-Pole, 4.4mm Balanced / 5-Pole, Bluetooth
Additional Tech Specs Visit official FiiO website for full Technical Specifications
User Reviews