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FiiO X7 Mark II Review

Product Specification

Main Unit
Name / Model No.X7 Mark Ⅱ (FX5321)Operating SystemDeeply customized Android 5.1.1
CPU ModelRK3188No. of cores4
CPU operating frequency1.4GHzDACESS9028 PRO
KeyboardVirtual QWERTY keyboardInput methodTouchscreen
Special featuresDual Android / Pure Music operating modes, symmetrical remappable keys, USB DAC, docking connector, etc.User InterfaceAndroid 5.1.1 / FiiO Music
Chips usedSoC: RK3188, DAC:ESS9028 PRO, LPF: OPA1612x2, OP: Customized OPA926x2
Connectivity
WIFI5GHz/2.4GHz IEEE802.11 b/g/n standards supportedBluetoothBluetooth V4.1,aptX supported
USBMicro USB2.0
Display screen
Display size3.97 inchesNumber of colours16.7 million colours
Display typeIPS TFTViewable angle178°
Resolution480×800Pixel density233 ppi
TouchscreenYes
Storage
RAM2GBTotal ROM64GB
Storage expansion typeMicro SDROM available to the userAbout 55GB
Maximum storage expansion512GB (256GB x 2)
Buttons and ports
ButtonsSide buttons + side volume wheel+ touchscreenCustom key mappingN/A
Headphone out3.5mm standard headphone output jackBalanced outputSupported (2.5mm balanced headphone jack)
Line out/Digital Coaxial out/Optical outputStandard 3.5mm port (shared LO/Coaxial out)USB connectionMicro USB2.0 (charging / data transfer / docking function / USB DAC)
General
ColourTitaniumDimensionsabout 128.7mm(H)×67.2mm(W)×15.5mm(D)
Weightabout 212gVolume control120 steps +/- button control (via analogue-domain controller
Recommended headphone impedance16~150 Ω (Headphone out)
16~300 Ω (Balanced out)
Equalizer10-band EQ (±6dB), 9 presets+custom preset, ViPER Effect
Bass boostN/ATreble boostN/A
Balance control10 dBGain controlLow/High
USB DACUp to 192kHz/24bit supported
Power specifications
USB power adapterDC 12/1.5A, 9V/2A, 5V/2A recommendedBatteryInternal 3800 mAh High-voltage quick charging Li-polymer battery
Charging indicationvia LCD display and pulse LEDCharging time<100 min (DC 12V/1.5A)
<2.5 h (DC 5V/2A)
Battery indicationYes (accurate battery % readings)
Battery Life & Test Conditions
3.5mm headphone output:>8 h
Volume62GainLow
LoadM3 open earbuds (27 Ω)ScreenOFF
Test FileMP3 44.1kHz/16bit (Download link)EQOFF
2.5mm TRRS balanced headphone output:>7 h
Volume51GainLow
Load32ΩScreenOFF
Test FileMP3 44.1kHz/16bit (Download link)EQOFF
Others
Firmware UpgradeSupported both via zip file(internal memory or external micro SD card) and OTAFont sizeChangeable
Third-party apps supportNo limit (recommended to install the apps listed on FiiO Market)
Line output specifications
THD+N<0.0008% (1 kHz/10kΩ)SNR≥119 dB (A-weighted)
Frequency response5 Hz~70 kHz(-3dB)Dynamic range>114 dB
Channel separation≥103 dB (1 kHz)Line level>1.8Vrms
Headphone out specifications (3.5mm headphone out jack)
Output power 1≥200 mW(16Ω / THD+N<1%)Output impedance<1.2Ω (32Ω loaded)
Output power 2≥150 mW(32Ω /THD+N<1%)Channel separation≥73 dB (1 kHz)
Output power 3≥17 mW(300Ω / THD+N<1%)THD+N<0.003% (1 kHz)
Frequency response6 Hz~60 kHz(-3dB)Peak output voltage>6 Vp-p
SNR≥116 dB (A-weighted)Max. output current>150mA (For reference)
Balanced headphone out specifications (2.5mm TRRS headphone out jack)
Output power 1≥380 mW(16Ω / THD+N<1%)Output impedance<1.7Ω (32Ω loaded)
Output power 2≥400 mW(32Ω /THD+N<1%)Channel separation≥97 dB (1 kHz)
Output power 3≥63 mW(300Ω / THD+N<1%)THD+N<0.003% (1 kHz)
Frequency response6 Hz~60kHz(-3dB)Peak output voltage>10 Vp-p
SNR≥119 dB (A-weighted)Max. output current>150 mA (For reference)
File format support
Lossless:DSD:DSD64/128(“.iso”,“.dsf”,“.dff”)
DXD:352.8kHz
APE FAST/High/Normal:384kHz/24bit(MAX)
APE Extra High:192kHz/24bit(MAX)
APE Insane:96kHz/24bit(MAX)
Apple Lossless:384kHz/32bit(MAX)
AIFF:384kHz/32bit(MAX)
FLAC:384kHz/32bit(MAX)
WAV:384kHz/64bit(MAX)
WMA Lossless:96kHz/24bit(MAX)
Lossy compression:MP3, AAC, WMA, OGG…
Price:USD 649.99 (SGD 999)

Part 1: Introduction, Design and Build
Part 2: Usability
Part 3: Sound Quality
Part 4: Product Specifications
Part 5: Review Ratings, Summary

Author

  • Goh Beng Yeow

    Goh Beng Yeow, the Founder / Editor at Porta-Fi™, is a recipient of the IT Youth Award in Singapore. Twice nominated for EY Entrepreneur of the Year Awards, Beng Yeow has previously founded startups such as PDALive.com, Coded Pixels Consultants and was a Tech writer for TODAY, a national daily newspaper under MediaCorp. Since 2017, he has been writing, editing and producing commentaries, interviews, news and reviews on Porta-Fi™. In 2019, Beng Yeow was appointed Advisor to LHDC™, the industry's latest low latency and high-definition Bluetooth audio codec.

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Goh Beng Yeow
Goh Beng Yeow
Goh Beng Yeow, the Founder / Editor at Porta-Fi™, is a recipient of the IT Youth Award in Singapore. Twice nominated for EY Entrepreneur of the Year Awards, Beng Yeow has previously founded startups such as PDALive.com, Coded Pixels Consultants and was a Tech writer for TODAY, a national daily newspaper under MediaCorp. Since 2017, he has been writing, editing and producing commentaries, interviews, news and reviews on Porta-Fi™. In 2019, Beng Yeow was appointed Advisor to LHDC™, the industry's latest low latency and high-definition Bluetooth audio codec.

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