X7 Android Portable Music Player

Portable Players by FIIO
X7 Android Portable Music Player


X7 Android Portable Music Player

The X7 from Fiio is their most ambitious product to date that includes a number of mini-revolutions that distinguish it from any other product in it's category, the amp module system allows for adaptation and upgrades which equal a longer product life-cycle.

The X7 utilises Rockchip's RK3188SoC with 4 cortex-A9 cores running at 1.4GHz which is both incredibly powerful but efficient. Not only does the X7 support  popular lossless and lossy formats such as WAV, FLAC, APE, ALAC, AIFF, WMA, MP3 and OGG etc. higher formats such as DXD, DSD64/128 are supported as well as PCM up to 384kHz/64bit.

Designed originally for hi-end home audio systems, the X7 is one of the first devices to use the original ESS ES9018S chipset for portable audio. It's 8 output channels are bridged for an astonishing 135db signal to noise ratio and dynamic range. 

The Patent-pending dedicated source module and independent headphone amplifier module design keeps the compact integrated profile of a single portable music player while providing the sonic advantages of using a seperate headphone amplifier. 

The X7 ultilises a full multi-touch screen for operation with a symmetrical button design on either side. The X7's embedded music app (FiiO Music) was researched and developed with as much effort as the hardware itself. Compared to usual Android music apps, the X7 music app handles lossless music more proficiently and is more user-friendly. The interface is clear and concise with all the status and indicators available at your fingertips within a few screen pages. 

If that is not enough, the X7 also supports Bluetooth devices for wireless music playback plus remote control with third party apps may be used to connect to unlimited online music services via Wi-Fi. Through firmware updates, playback via DLNA/UPnP from a NAS or cloud storage can be added. 


Main Unit

Name / Model No. X7(FX7121) Operating System Deeply customized Android 4.4.4
CPU Model RK3188 No. of Cores 4
CPU Operating Frequency 1.4GHz DAC ES9018S
Keyboard Virtual QWERTY keyboard Input Method Touchscreen
Special features Dual Android / Pure Music operating modes, symmetrical remappable keys, separate interchangeable amp modules, USB DAC, docking connector, etc. User Interface Android 4.4.4 / FiiO Music


WIFI 2.4GHz IEEE802.11 b/g/n standards supported Bluetooth 2.4GHz Bluetooth V4.0 + EDR
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 Tracks up to 5 simutaneous touch points    


Light Sensor Included NFC Not included
Accelerometer Included    


RAM 1GB Total ROM 32GB
Storage Expansion Type Micro SD ROM Available to User About 27G
Maximum Storage Expansion 128GB    

Buttons and Ports

Buttons Side buttons + touchscreen Custom Key Mapping Supported (track and volume controls)
Headphone Out 3.5mm TRRS (supports in-line remotes) Balanced Output Supported (balanced amp module sold separately)
Line out / Coaxial Out 3.5mm TRRS composite port USB Connection Micro USB2.0 (charging / data transfer / docking function / USB DAC)


Color Titanium Dimensions 130 mm× 64 mm× 16.6 mm
Weight 220g Volume Control 120 steps +/- button control (via analog-domain controller
Recommended headphone Impedance 16~300 Ω (depending on fitted amp module) Equalizer 10-band EQ (±6dB), 8 presets+custom preset, freestyle EQ curve drawing planned
Bass Boost N/A Treble Control N/A
Balance Control Max. 10 dB bias Gain Control Low / High
USB DAC Up to 384kHz/32bit supported, DSD supported (driver installation required on computer)    

Power Specifications

USB Power Adapter DC5V 2A recommended Battery  Internal 3500 mAh Li-polymer battery
Charging Indication Via LCD display and pulse LED Battery Indication  Yes
Charging Time <4.5h (using USB 5V 2A charger)    


Firmware upgrade supported both via zip file and OTA Font Size Changeable

Partial Performance Parameters for Line Output

THD+N <0.0007% (10 KΩ/1 kHz) SNR ≥115 dB (A-weighted)
Frequency Response 20 Hz~20 kHz Dynamic Range >115 dB
Channel Separation >100 dB (10 KΩ/1 kHz) Line Level >1.4 Vrms (10 KΩ/1 kHz)

Partial Performance Parameters 1 for Headphone Output 

(Specifications with AM1 headamp module (bundled low-gain module for sensitive headphones and IEMs; OPA1612+AD8397 amp+buffer.  ±3.1V voltage supply, software gain))

Output Power 1 >100 mW(32Ω/1 kHz) Output Impedance <0.2 Ω(32Ω load)
Output Power 2 >200 mW(16Ω/1 kHz) Channel Separation >73 dB(32Ω/1 kHz)
Output Power 3 >10 mW(300Ω/1 kHz) THD+N <0.0008% (32Ω/1 kHz)
Frequency Response 20 Hz~20 kHz Peak Output Voltage >5.2 Vp-p
SNR ≥115 dB (A-weighted) Max. Output Current >250 mA(For reference)

Partial Performance Parameters 2 for Headphone Output 

(Specifications with AM2 headamp module (Medium-power type; MUSES02+BUF634 amp+buffer.  ±7.5/5.3V voltage supply, hardware gain))

Output Power 1 >300 mW(32Ω/1 kHz) Output Impedance <0.5Ω(32Ω load)
Output Power 2 >350 mW(16Ω/1 kHz) Channel Separation >72 dB(32Ω/1 kHz)
Output Power 3 >30 mW(300Ω/1 kHz) THD+N <0.001% (32Ω/1 kHz)
Frequency Response 20 Hz~20 kHz Peak Output Voltage >8.8 Vp-p
SNR ≥118 dB (A-weighted) Max. Output Current >250 mA(For reference)
Audio Formats Supported

APE FAST/High/Normal:384kHz/24bit(MAX)
APE Extra High:192kHz/24bit(MAX)
APE Insane:48kHz/24bit(MAX)
Apple Lossless:384kHz/24bit(MAX)


Lossy Compression: