General Specifications | |||
Model/Number | X1 2nd gen / FX1221 | Headphone out (PO) | 3.5mm headphone output jack |
Color Available | Sliver/Black/Rose gold/Red (limited edition) | Headphone Impedance Range | 16~100 Ω |
Dimensions | 97mm×55.5 mm×12 mm | Volume control type | 100 steps digital potentiometer |
Weight | 102 g | Bass Boost | N/A |
Display Screen | TFT 320×240 | Treble | N/A |
Analog Audio Output Jack(LO) | 3.5 mm headphone output jack | Balance | 5 dB |
Digital Audio Output Jack | N/A | Gain Selection | N/A |
USB DAC | N/A | Equalizer | 7-band equalizer (±6dB) |
Chips used |
SoC: JZ4760B , DAC: PCM5242, LPF: OPA2322, OP: ISL28291 |
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Partial Performance Parameters for Line Output | |||
THD+N | ≤ 0.003% (1 kHz) | SNR | ≥115 dB (A-weighted) |
Frequency Response | 5 Hz~60 kHz (-3dB) | Dynamic range | ≥107 dB |
Crosstalk | ≥ 101 dB (10 KΩ/1 kHz) | Line output Level | 1.7 Vrms (10 KΩ/1 kHz) |
Partial Performance Parameters for Headphone Output | |||
Output Power 1 | > 100 mW (16 Ω/THD+N<1%) | Output Impedance | <1Ω(32Ω loaded) |
Output Power 2 | ≥ 70 mW (32 Ω/THD+N<1%) | Crosstalk | ≥72 dB (1 kHz) |
Output Power 3 | ≥ 8 mW (300 Ω/THD+N<1%) | THD+N | ≤ 0.003% (1 kHz) |
Frequency Response | 5 Hz~60 kHz (-3dB) | Max. output voltage | >4.0 Vp-p |
SNR | ≥113 dB (A-weighted) | Max. output current | >130 mA(For reference) |
Power and Battery | |||
Power | Recommend DC5V 2A | Battery Capacity | 1800 mAh |
Charge Display | Red light indicates , green light turns on after fully charged | Battery Display | Yes |
Battery Life | >12 h | Charging Time | <3 h (DC5V 2A) |
Battery Life Test Conditions | |||
Screen |
OFF |
Load | M3 open earbuds (27 Ω) |
Volume | 39 | EQ | OFF |
Test File | MP3 44.1kHz/16bit (Download link) | ||
Audio Format Supported | |||
Lossless: APE(Fast): 192 kHz/24 bit;
Lossy compression: MP3、WMA、OGG.... |
Frequency Response diagram of curves.
Test condition:play -5 dB sinusoidal signal, VOL=MAX, Lineout(10kΩ loaded)
Blue curve: Left channel , Red curve: Right channel
Frequency Response diagram of curves.
Test condition:play -5 dB sinusoidal signal, VOL=MAX,Headphone output(33 ohms loaded)
Blue curve: Left channel , Red curve: Right channel
Distortion diagram of curves.
Test condition:play -5 dB sinusoidal signal,Line output
Distortion diagram of curves.
Test condition:play -5 dB sinusoidal signal,headphone output