Fiio X5 III


FiiO X5 III 3rd Gen. Portable High Res audio player. Android-based, mastering quality, lossless playback portable music player. Doubling down on sound quality. Features Bluetooth and WiFi.

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The FiiO X5 III High End audio player MP3 is equipped with two top-of-the-line AKM AK4490EN DACs, one for each channel. The AK4490EN is a part of a new generation of high-quality 32-bit DACs that supports all PCM and DSD formats. By using a dual-channel implementations of AKM’s unique VELVET SOUND low-distortion architecture that includes digital filtering with 32-bit processing, the DAC chips in the FiiO X5 III have the ability to finely and exactly reproduce your music.



Dual crystal oscillators for faithfully reproduced music
The FiiO X5 III utilizes two separate crystal oscillators, one for the DSD/44.1/88.2/176.4/352.8kHz sampling rates and the other for 48/96/192/384kHz. This ensures that under all sampling rates, there is significantly reduced jitter, improved clock accuracy, more stable operation, and virtually no sampling rate conversion artifacts.


Four-way LPF for first-rate amplification
The FiiO X5 3rd gen utilizes two dual-channel OPA1642 chips for its low-pass filtering stage and a custom-made audiophile-grado OPA426 chip for amplification, providing greater power output (up to 300mW under a 32 Ohm load) and greater ability to deal with capacitive loads. The outstanding sound quality of the final audio architecture employed in the FiiO X5 3rd generation is the result of closed beta users working tirelessly together with the team at FiiO in a quest to make this new FiiO X5 III sound the best that it can.


Dual headphone outputs for double fun
The FiiO X5 III has two headphones outputs – one single-ended and the other balanced. This allows the new FiiO X5 III to cater to fans of either headphones output type.


Deeply customized Android 5.1 OS for efficient music playback
To circumvent the problem of third-party Android apps automatically converting the sample rate of music, FiiO’s software team wrote an entire new audio software architecture for its deeply customized and optimized version of the Android 5.1 OS. This result in improved sound quality and better overall performance of the device, and also gives 90 more minutes of battery life compared to running under Android 4.4


Two operating modes for more enjoyment
The FiiO X5 III, following in tyhe footstep of Fiio’s flagship DAP, also offers two modes of operation, pure music mode and Android mode.
In Pure Music Mode, only the main music player is available, no other apps run for smoother operation and a purer sound.
In Android Mode, users are free to install and run any third-party Android apps according to their needs. By offering these two modes of operation, the FiiO X5 III can satisfy both the music purtists and those who need more versatility.


WiFi and Bluetooth (aptX) for a connected era
The FiiO X5 III brings a number of new features for a convenient wireless experience, 2.4 GHz allows users to listen to their favorite online streaming services. Aptx ensures a low latency, high-quality wireless Bluetooth experience, and DLNA is supported for even more forms of wireless connectivity. With the FiiO X5 III , you can play your music anytime, anywhere.


All-new, throroughly reworked user interface
The FiiO X5 III has an all new UI that has been throroughly and carefully changed from past efforts down to the last pixel, for example, many of the icons have been redesigned, such as the ones for EQ setting and system settings. The new UI has a black theme with splashes of thoughtfully-placed bold colors for a clean, modern presentation.


Concealed microSD card design
In order to make a more seamless-looking and durable chassis, the FiiO X5 III design team needed to rethink the design of the microSD card slot. In this new design made of fine stainless steel powder based on new metallurgical methods, the gap between the microSD card slot and the rest of the body is only 0.2mm, making for a more handsome body.


Dual microSD card slots
The FiiO X5 III gen contains both 32GB of built-in storage and two external microSD card slots. Since each microSD card slot supports up to 256GB cards, the X5 3rd gen is able to carry up to a whopping 544GB of music, enough to store up to 130.000 songs.


Side-facing volume knob
New to the FiiO X5 III gen is a physical volume knob, which is slightly recessed within a guard so as to prevent accidental volume changes but still easy to manipulate. The volume knob contains several of FiiO’s characteristic design traits, such as the 45º grooves on the volume knob as well as the rigid lines and smooth circular elements which complement each other for a striking unique look.


3 modes of charging to quickly get back up and running
The FiiO X5 III contains a 3.8V 3400mAh battery that provides more than 10 hours of playing time. But when you do run out of battery, the new FiiO X5 has new rapid charging technology with temperature detection (with an on-screen indicator) that not only supports the typical BC 1.2 USB charging specification but also supports 9V/12V high-voltage rapid charging. When charged at the maximum current rate of 1.2C, the FiiO X5 III ‘s battery can be filled in a mere 1.5 hours.


Meticulosly detailed, inside and out
The upgrade in the feel and grip of the FiiO X5 III 3rd gen’s body over the previous X5 is immediately apparent. In order to achieve a smoother finish, the X5 3rd gen’s body is made of specially-selected No. 180 zirconium sand. The front panel features a subtle dot matrix pattern, while the rear is tastefully adorned with a snazzy fine star pattern. The anodized titanium and gold color paints perfectly harmonize with each other to give the FiiO X5 III 3rd gen a understated yet luxurious appearance. The molded chassis, plastic, and stainless steel on every corner of the new FiiO X5 III come together seamlessly for a very sleek look. This makes even the headphone jack more durable and look more integrated with the rest of the body.


A highly versatile player
The X5 3rd gen can be used in multitude of different ways according to the needs of the user. With a special cable, the X5 III gen can be in a car ins its in-vehicle mode. It can be connected to a computer as a USB DAC. It can also act as a transport, outputting digital audio signals to an external USB DAC. And finally, it can also be docked to the FiiO K5 docking statio, through which it can be charged and connected in even more different ways.


DAC AK4490 x 2
Quad-Core RK3188 processor
32GB built-in storage
1GB of RAM
Up to 512GB of expanded microSD storage
Supports 2.5mm TRRS balanced output
2 operating modes
3.8V battery
Bluetooth 4.0
2.4GHz Wi-Fi
3.97in touch screen
2 charging modes



WIFI: 2.4GHz IEEE802.11 b/g/n standards supported
Bluetooth: Bluetooth V4.0,aptX supported
USB: Micro USB2.0


Display screen
Display size: 3.97 inches
Number of colours: 16.7 million colors
Display type: IPS TFT
Viewable angle: 178°
Resolution: 480×800
Pixel density: 233 ppi
Touchscreen: Yes


Total ROM: 32GB
Storage expansion type: Micro SD
ROM available to user: About 26G
Maximum storage expansion: 512GB (256GB x 2)


Dimensions: 114.2 mm× 66.2 mm× 14.8 mm
Weight: 186g
Volume control: 120 steps +/- button control (via analog-domain controller)
Recommended headphone impedance: 16~150 Ω
Equalizer: 10-band EQ (±6dB), 9 presets+custom preset, freestyle EQ curve drawing (to be added in the future), ViPER4 equalizer (to be added in the future)
Bass boost: N/A
Treble boost: N/A
Balance control: 10 dB
Gain control: Low/High
USB DAC: Up to 192kHz/24bit supported


Headphone out specifications (3.5mm headphone out jack)
Output power 1: ≥480 mW(16Ω / THD+N<1%)
Output impedance: <1Ω (32Ω loaded)
Output power 2: ≥250 mW(32Ω /THD+N<1%)
Channel separation: >73 dB (1 kHz)
Output power 3: ≥28 mW(300Ω / THD+N<1%)
THD+N: <0.003% (1 kHz)
Frequency response: 5 Hz~55 kHz (-3dB)
Peak output voltage: >8 Vp-p
SNR: ≥115 dB (A-weighted)
Max. output current: 250mA (For reference)


Balanced headphone out specifications (2.5mm TRRS headphone out jack)
Output power 1: ≥400 mW (16Ω / THD+N<1%)
Output impedance: <3Ω (32Ω loaded)
Output power 2: ≥240 mW (32Ω /THD+N<1%)
Channel separation: ≥98 dB (1 kHz)
Output power 3: ≥26 mW (300Ω / THD+N<1%)
THD+N: <0.003% (1 kHz)
Frequency response: 5 Hz~55kHz (-3dB)
Peak output voltage: >7.5 Vp-p
SNR: ≥111 dB (A-weighted)
Max. output current: >250 mA (For reference)


File format support
DSD:DSD64/128 (“.iso”, “.dsf”, “.dff”)
APE FAST/High/Normal: 384kHz/24bit (MAX)
APE Extra High: 192kHz/24bit (MAX)
APE Insane: 48kHz/24bit (MAX)
Apple Lossless: 384kHz/24bit (MAX)
AIFF: 384kHz/24bit (MAX)
FLAC: 384kHz/24bit (MAX)
WAV: 384kHz/64bit (MAX)
WMA LOSSLESS: 96kHz/24bit (MAX)


Lossy compression


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