Model/Number X3 Mark III/ FX3321 X1(X1 2nd gen) X3(X3 2nd gen)
General Specifications
Color Red/Black Sliver/Black/Rose gold/Red (limited edition) Titanium/Black/Gold
Dimensions 114mm×59 mm×12.8 mm 97mm×55.5 mm×12 mm 96.7 mm×57.7 mm×16.1 mm
Weight 126 g 102 g 135 g
Display Screen TFT 320×240 TFT 320×240 2.0" TFT screen, 320x240 pixels
Headphone Out Standard 3.5mm Port (Shared Headphone out/Line out/Coaxial out) Standard 3.5mm Headphone Port Standard 3.5mm headphone Port
Line Out Standard 3.5mm Port (Shared Headphone out/Line out/Coaxial out) Standard 3.5mm headphone Port Standard 3.5mm Port (Shared Line out/Coaxial out)
Digital Out (Coaxial) Standard 3.5mm Port (Shared Headphone out/Line out/Coaxial out) N/A Standard 3.5mm Port (Shared line out / Coaxial out)
Balanced Out 2.5mm headphone output jack N/A N/A
USB DAC Supporting up to 192kHz/24 bit (driver installation required) N/A Supporting up to 192kHz/24 bit and DSD (driver installation required)
Drive Ability 16~150 Ω 16~100 Ω 16~150 Ω
Volume Control 120 steps digital potentiometer 100 steps digital potentiometer 120 steps digital potentiometer
Treble N/A N/A N/A
Bass N/A N/A N/A
Equalizer 10-band equalizer (±6dB) 7-band equalizer (±6dB) 10-band equalizer (±6dB)
Channel Balance 5 dB 5 dB  5 dB  
Gain Gain=L:1.1dB(PO)/ 2.5dB(BAL)
Gain=H:7.2dB(PO)/ 8.2dB(BAL)
N/A 2.6dB(GAIN=L)
8.6dB(GAIN=H)
Internal Memory N/A N/A N/A
Expansion Memory (Maximum) 256 GB 256 GB 256 GB
Chips used

SoC: JZ4760B

DAC: PCM5242 *2   

LPF: OPA2140    

OP:  OPA1622

SoC: JZ4760B

DAC: PCM5242

LPF: OPA2322

OP: ISL28291

SoC: JZ4760B

DAC: CS4398

LPF: OPA1642

OP: OPA1612+LMH6643

Partial Performance Parameters for Line Output
THD+N ≤ 0.002% (1 kHz) ≤ 0.003% (1 kHz) <0.001% (1 kHz)
Frequency Response 5Hz~70kHz (-3dB) 5 Hz~60 kHz (-3dB) 10 Hz~55 kHz (-3dB)
Crosstalk ≥ 103 dB (10 KΩ/1 kHz) ≥ 101 dB (10 KΩ/1 kHz) >102 dB (10 KΩ/1 kHz)
SNR ≥113 dB  (A-weighted) ≥115 dB  (A-weighted) ≥114 dB (A-weighted)
Dynamic Range ≥107 dB ≥107 dB >110 dB
Line Output Level 1.9 Vrms (10 KΩ/1 kHz) 1.7 Vrms (10 KΩ/1 kHz) 1.45 Vrms (10 KΩ/1 kHz)
Partial Performance Parameters for Headphone Output
Output Power 1 ≥120mW (16 Ω/THD+N<1%) >100 mW (16 Ω/THD+N<1%) >224 mW (16 Ω/THD+N<1%)
Output Power 2 ≥ 160 mW (32 Ω/THD+N<1%)

≥ 70 mW (32 Ω/THD+N<1%)

>200 mW (32 Ω/THD+N<1%)
Output Power 3 ≥ 15 mW (300 Ω/THD+N<1%)

≥ 8 mW (300 Ω/THD+N<1%)

>24 mW (300 Ω/THD+N<1%)
Frequency Response 5Hz~70kHz (-3dB) 5 Hz~60 kHz (-3dB) 10 Hz~55 kHz (-3dB)
SNR ≥112 dB  (A-weighted) ≥113 dB (A-weighted) ≥113 dB ( A-weighted)
Output Impedance <1.4Ω(32Ω loaded) <1Ω (32Ω loaded) <0.2 Ω (32Ω loaded)
Crosstalk ≥69 dB (1 kHz) ≥72 dB (1 kHz) >74 dB (1 kHz)
THD+N ≤ 0.002% (1 kHz) <0.003% (1 kHz) <0.001% (1 kHz)
MAX. Output Voltage >6.5 Vp-p >4.0 Vp-p 7.2 Vp-p
MAX. Output Current >145 mA(For reference) >130 mA(For reference) >75 mA (For reference)
Power and Battery
Power Recommend DC5V 2A DC5V 2A recommended DC5V 2A recommended
Charge Display Red light indicates , green light turns on after fully charged Red light indicates , green light turns on after fully charged Red light indicates , green light turns on after fully charged
Battery Display Yes Yes Yes
Battery Capacity 2350 mAh 1800 mAh 2600 mAh
Battery Life

≥10 h (headphone out: 27Ω open earbuds; volume 61; display off; EQ off; MP3 44.1kHz/16bit)

≥10 h(balanced out: 32Ω; volume 59; display off; EQ off; MP3 44.1kHz/16bit)

>12 h  (27Ω open earbuds; volume 39; display off; EQ off; MP3 44.1kHz/16bit ) >11 h  (27Ω open earbuds; volume 58; display off; EQ off; Gain=L; MP3 44.1kHz/16bit )
Charging Time <3 h (DC5V 2A) <3 h (DC5V 2A) <3 h (DC5V 2A recommended)
Audio Formats Supported
Lossless:

DSD:DSD64(.iso, .dsf和.dff)
APE(Fast): 192 kHz/24 bit;
APE(Normal): 96 kHz/24 bit;
APE (High): 96 kHz/24 bit;
FLAC: 192 kHz/24 bit;
WAV: 192 kHz/32 bit;
Aiff:192 kHz/32 bit;
Aif:192 kHz/24 bit;
WMA Lossless: 48 kHz/24 bit (to be supported by future update);
Apple Lossless: 192 kHz/24 bit;

APE(Fast): 192 kHz/24 bit;
APE(Normal): 96 kHz/24 bit;
APE (High): 96 kHz/24 bit;
FLAC: 192 kHz/24 bit;
WAV: 192 kHz/32 bit;
Aiff:192 kHz/32 bit;
Aif:192 kHz/24 bit;
WMA Lossless: 48 kHz/24 bit (to be supported by future update);
Apple Lossless: 192 kHz/24 bit;

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:192 kHz/24 bit;
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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