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)
|
Supports most headphones on the market
(Play/Pause, Previous/Next, Volume Up/Down)
|
Supports CTIA standards headphones
(Play/Pause, Previous/Next)
|
Does not support in-line volume control |
Does not support in-line volume control
from Apple Earpods
|
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) |
>10 h (3.5mm headphone output) |
>10 h (32Ω, normal volume with LCD off)_ |
> 6 h (AM3, 2.5mm TRRS balanced output) |
> 8 h (2.5mm TRRS balanced output) |
Charging Time |
<4.5h (DC5V 2A recommended) |
<2h (DC12V/1.5A quich charge) |
<4 h (DC5V 2A recommended) |
<3h (DC5V/2A normal charge) |
Audio Formats Supported |
Lossless: |
DSD:DSD64/128 (".iso", ".dsf", ".dff") |
DSD:DSD64/128 (".iso", ".dsf", ".dff") |
DSD: DSD64, DSD128 (".iso", ".dsf", ".dff"); |
DXD:352.8K |
DXD:352.8K |
APE(Fast): 192 kHz/24 bit; |
APE FAST/High/Normal:384kHz/24bit(MAX) |
APE FAST/High/Normal:384kHz/24bit(MAX) |
APE(Normal): 96 kHz/24 bit; |
APE Extra High:192kHz/24bit(MAX) |
APE Extra High:192kHz/24bit(MAX) |
APE (High): 96 kHz/24 bit; |
APE Insane:48kHz/24bit(MAX) |
APE Insane:48kHz/24bit(MAX) |
AIFF:192kHz/24bit; |
Apple Lossless:384kHz/24bit(MAX) |
Apple Lossless:384kHz/24bit(MAX) |
FLAC: 192 kHz/24 bit; |
AIFF:384kHz/24bit(MAX) |
AIFF:384kHz/24bit(MAX) |
WAV: 192 kHz/64 bit; |
FLAC:384kHz/24bit(MAX) |
FLAC:384kHz/24bit(MAX) |
WMA Lossless: 96 kHz/24 bit; |
WAV:384kHz/64bit(MAX) |
WAV:384kHz/32bit(MAX) |
Apple Lossless: 192 kHz/24 bit; |
WMA LOSSLESS:96kHz/24bit(MAX) |
WMA LOSSLESS: 96kHz/24bit(MAX) |
|
Lossy Compression: |
MP3、WMA、OGG... |
MP3、WMA、OGG... |
MP3、WMA、OGG... |