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General Specifications
Model/Number X3(X3 2nd gen) Headphone Port Standard 3.5mm Headphone Port
Color Titanium/Black/Gold Drive Ability 16~150 Ω
Dimensions 96.7 mm×57.7 mm×16.1 mm Volume Control 120 steps digital potentiometer
Weight 135 g Equalizer 10-band equalizer (±6dB)
Display Screen 2.0" TFT screen, 320x240 pixels Treble N/A
Line Out Standard 3.5mm Port (Shared line out / S/PDIF coaxial out) Bass N/A
Digital Out (Coaxial) Standard 3.5mm Port (Shared line out / S/PDIF coaxial out) Balance 5 dB
USB DAC Supporting up to 24bit / 192kHz and DSD (driver installation required) Gain 2.6dB(GAIN=L)
8.6dB(GAIN=H)

Partial Performance Parameters for Line Output

THD+N <0.001% (1 kHz) SNR ≥114 dB (A-weight)
Frequency Response 10 Hz~55 kHz (-3dB) Dynamic Range >110 dB
Crosstalk >102 dB (10 KΩ/1 kHz) Line Output Level 1.45 Vrms (10 KΩ/1 kHz)
Partial Performance Parameters for Headphone Output
Output Power 1 >224 mW (16 Ω/THD+N<1%) Output Impedance <0.2 Ω(32Ω)
Output Power 2 >200 mW (32 Ω/THD+N<1%) Crosstalk >74 dB (1 kHz)
Output Power 3 >24 mW (300 Ω/THD+N<1%) THD+N <0.001% (1 kHz)
Frequency Response 10 Hz~55 kHz (-3dB) MAX Output Voltage >7.2 Vp-p
SNR ≥113 dB (A-weighted) MAX Output Current >75 mA (For reference)
Power and Battery
Power

DC5V 2A recommended

Battery Capacity 2600 mAh
Charge Display Red light indicates , green light turns on after fully charged Battery Display Yes 
Battery Life ≥ 11 h  Charging Time <3 h (DC5V 2A)
Battery Life Test Conditions
Screen

OFF

Load M3 open earbuds (27 Ω)
Volume 58 EQ OFF
Gain L Test File MP3 44.1kHz/16bit (download link)
Audio Formats Supported
Lossless:

DSD: DSD64, DSD128 (.iso&.dsf & .dff);
APE(Fast): 192 kHz/24 bit;
APE(Normal): 96 kHz/24 bit;
APE (High): 96 kHz/24 bit;
FLAC: 192 kHz/24 bit;

AIFF: 192 kHz/24 bit;
WAV: 192 kHz/64 bit;
WMA Lossless: 96 kHz/24 bit;
Apple Lossless: 192 kHz/24 bit;

Lossy compression: MP3、AAC、WMA、OGG...

 

 Frequency Response diagram of curves 1.

Test condition:play -5 dB sinusoidal signal,Gain=High , Lineout(10k ohms loaded)

Green curve: Left channel , Blue curve: Right channel.

 

 

Frequency Response diagram of curves 2.
Test condition:VOL=MAX, Gain = High, Headphone output(33 ohms loaded)

Green curve: Left channel , Blue curve: Right channel.

 

 

 

Distortion diagram of curves 1. 

Test condition:play -5 dB sinusoidal signal,DSD, Headphone output.

Distortion diagram of curve 2.

Test condition:play -5 dB sinusoidal signal,Line output.

Distortion diagram of curves 3.

Test condition:play -5 dB sinusoidal signal,PCM, Headphone output.

Distortion diagram of curves 4.

Test condition:play -5 dB sinusoidal signal,PCM, Line output

 

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