Home / Products / X7 Mark II
Name/Model No. X7 Mark II (FX7221) X7 (FX7121) X5 3rd gen (FX5321)
General Specifications
Color Titanium Titanium Titanium/Black/Red
Dimensions 128.7mm(H)×67.2mm(W)×15.5mm(D) 130 mm× 64 mm× 16.6 mm 114.2 mm× 66.2 mm× 14.8 mm
Weight 212 g 220 g 186 g
Screen Display 3.97 inches, 16.7 million colors, IPS TFT touch screen, Pixle density: 233 ppi, Resolution: 480x800 3.97 inches, 16.7 million colors, IPS TFT touch screen, Pixle density: 233 ppi, Resolution: 480x800 3.97 inches, 16.7 million colors, IPS TFT touch screen, Pixle density: 233 ppi, Resolution: 480x800
Line Out(LO) Standard 3.5mm Port (Shared line out /S/PDIF out) Standard 3.5mm Port (Shared line out /S/PDIF coaxial out) Standard 3.5mm Port (Shared line out /S/PDIF coaxial out)
Digital Out (Coaxial) Standard 3.5mm Port (Shared line out /S/PDIF out) Standard 3.5mm Port (Shared line out /S/PDIF coaxial out) Standard 3.5mm Port (Shared line out /S/PDIF coaxial out)
Digital Out (Optical) Standard 3.5mm Port (Shared line out /S/PDIF out) N/A N/A
USB DAC Supporting up to 192kHz/24bit Supporting up to 384kHz/32bit Supporting up to 192kHz/24bit
Headphone Output Standard 3.5mm Headphone Port Standard 3.5mm Headphone Port Standard 3.5mm Headphone Port
Drive Ability 16~150 Ω (Headphone out)
16~300 Ω (Balanced out)
16~300 Ω (it may change with different amp modules) 16~150 Ω
Volume Control 120 steps digital potentiometer 120 steps digital potentiometer 120 steps digital potentiometer
Treble Boost N/A N/A N/A
Bass Boost N/A N/A N/A
Equalizer 10-band EQ (±6dB), 9 presets+custom preset,  ViPER Effect 10-band EQ (±6dB), 9 presets+custom preset,  ViPER Effect(Android 5.1) 10-band EQ (±6dB), 9 presets+custom preset, ViPER Effect
Balance Control 10 dB 10 dB  10 dB
Gain Control Low/High Low/High Low/High
Internal Memory 64GB (about 55GB available to user) 32GB (about 27GB available to user) 32GB (about 26GB available to user)
Expansion Memory (Maximum) 512GB (256GBx2) 256GB 512GB (256GBx2)
Chips used SoC: RK3188, DAC: ES9028 PRO,  LPF: OPA1612x2, OP: customized OPA926x2 (AM3A) SoC: RK3188, DAC: ES9018S, LPF: OPA1612 , OP: (it may change with different amp modules) SoC: RK3188, DAC: AK4490x2,  LPF: OPA1642x2, OP: customized OPA426x2
Others
Input Methods Physical buttons + Touch screen + Side volume wheel Physical buttons + Touch screen Physical buttons + Touch screen + Side volume wheel
Buttons Mapping N/A Yes N/A
Font Size Adjustment Yes Yes Yes
In-line Control

Supports most headphones on the market (Play/Pause, Previous/Next, Volume Up/Down)

Does not support in-line volume control from Apple Earpods

Supports CTIA standards headphones (Play/Pause, Previous/Next)

Does not support in-line volume control

Supports most headphones on the market (Play/Pause, Previous/Next, Volume Up/Down)

Does not support in-line volume control from Apple Earpods

WiFi 5GHz/2.4GHz  IEEE802.11 b/g/n standards 2.4GHz IEEE802.11 b/g/n standards 2.4GHz IEEE802.11 b/g/n standards
Bluetooth Supports Bluetooth v4.2 and aptX Supports Bluetooth v4.0 and aptX (with the latest firmware) Supports Bluetooth v4.0 and aptX
Firmware Upgrade Supports OTA upgrade and manual upgrade via internal memory or Micro SD card Supports OTA upgrade and manual upgrade via internal memory or Micro SD card Supports OTA upgrade and manual upgrade via internal memory or Micro SD card
Partial Performance Parameters for Line Output
THD+N <0.0008% (1 kHz/10kΩ) <0.0007% (1 kHz/10kΩ) <0.0009% (1 kHz/10kΩ)
Frequency Response 5 Hz~70 kHz(-3dB) 10 Hz~62 kHz (-3dB) 5 Hz~55kHz (-3dB)
Crosstalk ≥103 dB (1 kHz) >100 dB (10 KΩ/1 kHz) >98 dB (10 KΩ/1 kHz)
SNR ≥119 dB (A-weighted) ≥115 dB (A-weighted) ≥120 dB (A-weighted)
Dynamic Range >114 dB >115 dB >117 dB
Line Output Level >1.8 Vrms (10 kΩ/1 kHz) >1.4 Vrms (10 KΩ/1 kHz) >1.8Vrms
Partial Performance Parameters for Headphone Output (The X7MKII in comparison is using AM3A as example)
3.5mm headphone output
Output Power 1 ≥200 mW(16Ω / THD+N<1%) >250mW (16Ω / THD+N<1%) ≥480 mW (16Ω / THD+N<1%)
Output Power 2 ≥150 mW(32Ω /THD+N<1%) >190mW (32Ω / THD+N<1%) ≥250 mW (32Ω /THD+N<1%)
Output Power 3 ≥17 mW(300Ω / THD+N<1%) >25mW (300Ω / THD+N<1%) ≥28 mW (300Ω / THD+N<1%)
Frequency Response 6 Hz~60 kHz (-3dB) 5Hz~83kHz (-3dB) 5 Hz~55 kHz (-3dB)
SNR ≥116 dB (A-weighted) ≥115dB (A-weighted) ≥115 dB (A-weighted)
Output Impedance <1.2 Ω (32Ω loaded) <0.3Ω (32Ω loaded) <1Ω (32Ω loaded)
Crosstalk ≥73 dB (1 kHz) 72dB (32Ω/1kHz) >73 dB (32KΩ/1 kHz)
THD+N <0.003% (1 kHz) <0.001% (32Ω/1kHz) <0.003% (32 KΩ/1 kHz)
Max. Output Voltage >6 Vp-p >7Vp-p >8 Vp-p
Max. Output Current >150 mA (For reference) >80mA (for reference) >250mA (for reference)
Drive Ability 16~150 Ω 16~300 Ω 16~150 Ω
2.5mm TRRS Balanced Output
Output Power 1 ≥380 mW(16Ω / THD+N<1%) >420mW (16Ω / THD+N<1%) ≥400 mW (16Ω / THD+N<1%)
Output Power 2 ≥400 mW(32Ω /THD+N<1%) >540mW (32Ω / THD+N<1%) ≥240 mW (32Ω /THD+N<1%)
Output Power 3 ≥63 mW(300Ω / THD+N<1%) >70mW (300Ω / THD+N<1%) ≥26 mW (300Ω / THD+N<1%)
Frequency Response 6 Hz~60 kHz(-3dB) 5Hz~83kHz(-3dB) 5 Hz~55 kHz(-3dB)
SNR ≥119 dB (A-weighted) ≥115dB (A-weighted) ≥111 dB (A-weighted)
Output Impedance <1.7Ω (32Ω loaded) <0.3Ω (32Ω loaded) <3Ω (32Ω loaded)
Crosstalk ≥97 dB (1 kHz) >100dB (32Ω/1kHz) ≥98 dB (32Ω/1kHz)
THD+N <0.003% (1 kHz) <0.0008% (32Ω/1kHz) <0.003% (32 KΩ/1 kHz)
Max. Output Voltage >10 Vp-p >11 Vp-p >7.5 Vp-p
Max. Output Current >150 mA (For reference) >160mA (for reference) >250mA (for reference)
Drive Ability 16~300 Ω 16~150 Ω 16~150 Ω
Power and Battery
Power DC 12/1.5A, 9V/2A, 5V/2A recommended DC5V 2A recommended DC 12/1.5A, 9V/2A, 5V/2A recommended
Quick Charge Yes N/A Yes
Charge Display via LCD display and pulse LED via LCD display and pulse LED via LCD display
Battery Display Yes (battery level in percentage)  Yes (battery level in percentage) Yes (battery level in percentage)
Battery Capacity 3800 mAh 3500 mAh 3400 mAh
Battery Life >10 h (3.5mm headphone output)
> 8 h (2.5mm TRRS balanced output)
>6 h (AM3, 3.5mm headphone output)
> 6 h (AM3, 2.5mm TRRS balanced output)
>10 h (3.5mm headphone output)
> 8 h (2.5mm TRRS balanced output)
Charging Time <100 min(DC12V/1.5A quich charge)
<2.5 h(DC5V/2A normal charge)
<4.5h (DC5V 2A recommended) <2h (DC12V/1.5A quich charge)
<3h (DC5V/2A normal charge)
Audio Formats Supported
Lossless: DSD:DSD64/128/256(“.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)

DSD:DSD64/128 (".iso", ".dsf", ".dff")
DXD:352.8K
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)

DSD:DSD64/128 (".iso", ".dsf", ".dff")
DXD:352.8K
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/32bit(MAX)
WMA LOSSLESS: 96kHz/24bit(MAX)

Lossy Compression: MP3、WMA、OGG... MP3、WMA、OGG... MP3、WMA、OGG...
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