Home / Products / X5 3rd gen
Name/Model No. X7 (FX7121) X5 3rd gen (FX5321) X5 2nd gen (FX5221)
General Specifications
Color Titanium Titanium/Black/Red Titanium/Black/Gold
Dimensions 130 mm× 64 mm× 16.6 mm 114.2 mm× 66.2 mm× 14.8 mm 109 mm× 63.5 mm× 15.3 mm
Weight 220 g 186 g 165 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 2.4 inches, 262,144 color HD IPS screen with 400x360 pixels
Line Out(LO) Standard 3.5mm Port (Shared line out /S/PDIF coaxial 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 coaxial out) Standard 3.5mm Port (Shared line out /S/PDIF coaxial out) Standard 3.5mm Port (Shared line out /S/PDIF coaxial out)
USB DAC Supporting up to 384kHz/32bit Supporting up to 192kHz/24bit Supporting up to 192kHz/24bit
Headphone Output Standard 3.5mm Headphone Port Standard 3.5mm Headphone Port Standard 3.5mm Headphone Port
Drive Ability 16~300 Ω (it may change with different amp modules) 16~150 Ω 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(Android 5.1) 10-band EQ (±6dB), 9 presets+custom preset, ViPER Effect 10-band EQ (±6dB), 9 presets+custom preset
Balance Control 10 dB  10 dB 10 dB
Gain Control L/H L/H L/H
Internal Memory 32GB (about 27GB available to user) 32GB (about 26GB available to user) N/A
Expansion Memory (Maximum) 256GB 512GB (256GBx2) 512GB (256GBx2)
Chips used SoC: RK3188, DAC: ES9018S, LPF: OPA1612 , OP: (it may change with different amp modules) SoC: RK3188, DAC: AK4490x2,  LPF: OPA1642x2, OP: customized OPA426x2 SoC: JZ4760B, DAC: PCM1792A, LPF: OPA1612, OP: OPA1612+BUF634
Others
Input Methods Physical buttons + Touch screen Physical buttons + Touch screen + Side volume wheel Physical buttons + Mechanical wheel
Buttons Mapping Yes N/A N/A
Font Size Adjustment Yes Yes N/A
In-line Control

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

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

Does not support in-line volume control

WiFi 2.4GHz IEEE802.11 b/g/n standards 2.4GHz IEEE802.11 b/g/n standards N/A
Bluetooth Supports Bluetooth v4.0 and aptX (with the latest firmware) Supports Bluetooth v4.0 and aptX N/A
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 manual upgrade via Micro SD card
Partial Performance Parameters for Line Output
THD+N <0.0007% (1 kHz/10kΩ) <0.0009% (1 kHz/10kΩ) <0.001% (1 kHz/10kΩ)
Frequency Response 10 Hz~62 kHz (-3dB) 5 Hz~55kHz (-3dB) 10 Hz~65 kHz (-3dB)
Crosstalk >100 dB (10 KΩ/1 kHz) >98 dB (10 KΩ/1 kHz) >115 dB (10 KΩ/1 kHz)
SNR ≥115 dB (A-weighted) ≥120 dB (A-weighted) ≥114 dB (A-weighted)
Dynamic Range >115 dB >117 dB >110 dB
Line Output Level >1.4 Vrms (10 KΩ/1 kHz) >1.8Vrms 1.53 Vrms (10 KΩ/1 kHz)
Partial Performance Parameters for Headphone Output (The X7 in comparison is using AM3 as example)
3.5mm headphone output
Output Power 1 >250mW (16Ω / THD+N<1%) ≥480 mW (16Ω / THD+N<1%) >436 mW (16Ω/THD+N<1%)
Output Power 2 >190mW (32Ω / THD+N<1%) ≥250 mW (32Ω /THD+N<1%) >245 mW (32Ω//THD+N<1%)
Output Power 3 >25mW (300Ω / THD+N<1%) ≥28 mW (300Ω / THD+N<1%) >27 mW (300Ω/THD+N<1%)
Frequency Response 5Hz~83kHz (-3dB) 5 Hz~55 kHz (-3dB) 10 Hz~65 kHz (-3dB)
SNR ≥115dB (A-weighted) ≥115 dB (A-weighted) ≥117 dB (A-weighted)
Output Impedance <0.3Ω (32Ω loaded) <1Ω (32Ω loaded) <0.2Ω (32Ω loaded)
Crosstalk 72dB (32Ω/1kHz) >73 dB (32KΩ/1 kHz) >75 dB (32KΩ/1 kHz)
THD+N <0.001% (32Ω/1kHz) <0.003% (32 KΩ/1 kHz) <0.001% (32 KΩ/1 kHz)
MAX Output Voltage >7Vp-p >8 Vp-p >8.2 Vp-p
MAX Output Current >80mA (for reference) >250mA (for reference) >250 mA (for reference)
Drive Ability 16~300 Ω 16~150 Ω 16~150 Ω
2.5mm TRRS Balanced Output
Output Power 1 >420mW (16Ω / THD+N<1%) ≥400 mW (16Ω / THD+N<1%) N/A
Output Power 2 >540mW (32Ω / THD+N<1%) ≥240 mW (32Ω /THD+N<1%) N/A
Output Power 3 >70mW (300Ω / THD+N<1%) ≥26 mW (300Ω / THD+N<1%) N/A
Frequency Response 5Hz~83kHz(-3dB) 5 Hz~55 kHz(-3dB) N/A
SNR ≥115dB (A-weighted) ≥111 dB (A-weighted) N/A
Output Impedance <0.3Ω (32Ω loaded) <3Ω (32Ω loaded) N/A
Crosstalk >100dB (32Ω/1kHz) ≥98 dB (32Ω/1kHz) N/A
THD+N <0.0008% (32Ω/1kHz) <0.003% (32 KΩ/1 kHz) N/A
MAX Output Voltage >11 Vp-p >7.5 Vp-p N/A
MAX Output Current >160mA (for reference) >250mA (for reference) N/A
Drive Ability 16~150 Ω 16~150 Ω N/A
Power and Battery
Power DC5V 2A recommended DC 12/1.5A, 9V/2A, 5V/2A recommended DC5V 2A recommended
Quick Charge N/A Yes N/A
Charge Display via LCD display and pulse LED via LCD display Red light indicates , green light turns on after fully charged
Battery Display  Yes (battery level in percentage) Yes (battery level in percentage) Yes
Battery Capacity 3500 mAh 3400 mAh 3300 mAh
Battery Life >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)
>10 h (32Ω, normal volume with LCD off)_
Charging Time <4.5h (DC5V 2A recommended) <2h (DC12V/1.5A quich charge)
<3h (DC5V/2A normal charge)
<4 h (DC5V 2A recommended)
Audio Formats Supported
Lossless:

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)

DSD: DSD64, DSD128 (".iso", ".dsf", ".dff");
APE(Fast): 192 kHz/24 bit;
APE(Normal): 96 kHz/24 bit;
APE (High): 96 kHz/24 bit;
AIFF:192kHz/24bit;
FLAC: 192 kHz/24 bit;
WAV: 192 kHz/64 bit;
WMA Lossless: 96 kHz/24 bit;
Apple Lossless: 192 kHz/24 bit;

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