Model Name K1 KUNLUN-E18 ALPEN 2-E17K Q1
General Specifications
Color Available Titanium Black Black Black
Dimensions 50mm x 20.5mm x 8mm 130 mm×66.2 mm×14.6 mm 104.1 mm×62.2 mm×12.8 mm 97mm x 56mm x 13.1mm
Weight 11.3g (incl. belt clip) 162 g 110 g 100 g
Displayer N/A N/A OLED 128×64/1.3 inch N/A
Analog Audio input N/A 3.5 mm stereo Jack 3.5 mm stereo Jack Micro USB/3.5 mm Jack
Digital Audio input N/A N/A Micro USB/Coaxial/3.5 mm jack(COAXIAL adapter attached) N/A
Headphone output 3.5 mm stereo Jack 3.5 mm stereo Jack 3.5 mm stereo Jack 3.5 mm stereo Jack
Line Output N/A 3.5 mm stereo Jack Dock(Micro USB)/3.5 mm Line Out port 3.5 mm stereo Jack
Headphone Impedance Range 16~100 Ω(Recommended) 16~150 Ω 16~150 Ω 16~150 Ω (Recommended)
Volume Control N/A ALPS Potentiometer Digital Volume Control (0-60) TOCOS  Potentiometer
Bass Adjust N/A / ±10 dB 0/5dB
Treble Adjust N/A 0 dB/6 dB ±10 dB N/A
Balance Adjust N/A / 5 dB N/A
GAIN Control N/A 0/6 dB  0/6/12 dB AUX IN:-7dB/4.5dB
USB IN:-3.5dB/8dB
Line Out Bypass N/A YES YES YES
Audio Performance (DAC Section)
USB Sample Rate Support 32/44.1/48/96 kHz (16/24 bit) 32/44.1/48/96 kHz (16/24 bit) 32/44.1/48/96 kHz (16/32 bit)
DSD 2.8 MHz Supported
32/44.1/48/96 kHz (16/24 bit)
SPDIF Sample Rate Support N/A / 32/44.1/48/96/192 kHz (16/24 bit) N/A
THD+N <0.01% (1 kHz) <0.005% (32 Ω/1 kHz) (PO)
<0.003% (32 Ω/1 kHz) (LO)
0.003% (1 kHz) <0.0045% (10 kΩ/1 kHz) (LO)
SNR ≥100 dB >106 dB >105 dB ≥107 dB
Dynamic Range N/A >100 dB >102 dB >95 dB
Line Out Level N/A >1.3 Vrms >1.5 Vrms  >1.48 Vrms
Audio Performance
Output Power1 >75 mW(16Ω / THD+N<1%) >300 mW (32 Ω/THD+N<1%) >200 mW (32 Ω/THD<1%) >190 mW (32 Ω/THD+N<1%)
Output Power2 >35 mW(32Ω/THD+N<1%) >400 mW (16 Ω/THD+N<1%) >290 mW (16 Ω/THD+N<1%) >75 mW (150 Ω/THD+N<1%)
Frequency Response 20 Hz~20 kHz 20 Hz~20 kHz 20 Hz~20 kHz 20 Hz~20 kHz
SNR N/A >110 dB (AUX IN) >106 dB(AUX IN Gain 12 dB)
>113 dB(AUX IN Gain 0 dB/6dB)
≥110dB (AUX IN)
Output impedance ≤ 1 Ω <0.3 Ω <1.1 Ω <0.3 Ω
Crosstalk ≥70 dB >72 dB (1 kHz) >75 dB (1 kHz) ≥75dB (1 kHz)
THD+N N/A <0.005% (32 Ω/1 kHz) (PO)
<0.003% (32 Ω/1 kHz) (LO)
0.003% (1 kHz) <0.005% (32 Ω/1 kHz)
Max. Gain N/A / >12 dB N/A
Peak Output Voltage 3.25Vp-p 8 Vp-p >7.8 Vp-p 7.2 Vp-p
Max. output Current >35.93mA >94 mA >115 mA >75 mA
Input Overload N/A 1.5 Vrms 4 Vrms 4.3 Vrms
Power and Battery
Power/Charger N/A Recommend DC5V 2A Recommended DC5V 1A Recommend DC5V 1A
Charing Display N/A YES YES YES
Battery Level display N/A NA YES N/A
Capacity N/A 3500 mAh 1500 mAh 1400 mAh
Battery Life N/A

>25 h (1 kHz) (AUX IN)
>12 h (USB IN)

>15 h >30 h
Charge Time N/A 4 h ≤220 min ≤4 h

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